6.0.0

Dropped support for ColdBox 5

It's very likely that Quick v6 will still work on ColdBox 5, but it is no longer an officially supported platform.

5.1.0

KeyType now accepts the builder as a second argument to `preInsert`

This is only a breaking change if you have built your own key types. This is being released as a bug fix since the ReturningKeyType has not worked correctly since 5.0.0

/**
 * Called to handle any tasks before inserting into the database.
 * Receives the entity as the only argument.
 *
 * @entity   The entity that is being inserted.
 * @builder  The builder that is doing the inserting.
 *
 * @return   void
 */
public void function preInsert( required any entity, required any builder );

5.0.0

Dropped support for Adobe ColdFusion 2016

Please upgrade to a supported engine.

`addSubselect` calls must be accessed on the QuickBuilder

This means for scopes, you must call addSubselect off of the passed in builder object.

function scopeAddAuthorName( qb ) {
    qb.addSubselect( "authorName", "author.name" );
}

`applyGlobalScopes` functions now receive a Builder instance that should be used to call scopes

Instead of this:

function applyGlobalScopes() {
    this.addVendorName();
    this.addLocationName();
}

the scopes should be called on the passed in Builder instance:

function applyGlobalScopes( qb ) {
    qb.addVendorName();
    qb.addLocationName();
}

4.0.0

Scopes, whereHas, and whereDoesntHave are now automatically grouped when using an OR combinator

This isn't a breaking change that will affect most people. In fact, it will most likely improve your code.

Previously, when using scopes, whereHas, or whereDoesntHave, you were fully responsible for the wrapping of your where statements. For example, the following query:

var users = getInstance( "User" )
    .active()
    .search( event.getValue( "q", "" ) )
    .get();

with the following scopes defined:

function scopeActive( qb ) {
    qb.where( "active", 1 );
}

function scopeSearch( qb, term ) {
    qb.where( "username", "like", term & "%" )
        .orWhere( "email", "like", term & "%" );
}

would generate the following SQL:

SELECT *
FROM "users"
WHERE "active" = ?
    AND "username" = ?
    OR "email" = ?

The problem with this statement is that the OR can short circuit the active check.

The fix is to wrap the LIKE statements in parenthesis. This is done in qb using a function callback to where. Adding this nesting inside our scope will fix this problem.

function scopeSearch( qb, term ) {
    qb.where( function( q ) {
        q.where( "username", "like", term & "%" )
            .orWhere( "email", "like", term & "%" );
    } );
}

But this was easy to miss this. This is because you are in a completely different file than the built query. It also breaks the mental model of a scope as an encapsulated piece of SQL code.

In Quick 4.0.0, scopes, whereHas, and whereDoesntHave will automatically group added where clauses when needed. That means our original example now produces the SQL we probably expected.

SELECT *
FROM "users"
WHERE "active" = ?
    AND (
        "username" = ?
        OR "email" = ?
    )

Grouping is not needed if there is no OR combinator. In these cases no grouping is added.

var users = getInstance( "User" )
    .active()
    .isAdmin()
    .get();

function scopeActive( qb ) {
    qb.where( "active", 1 );
}

function scopeIsAdmin( qb ) {
    qb.where( "admin", 1 )
        .whereNotNull( "hireDate" );
}

SELECT *
FROM "users"
WHERE "active" = ?
    AND "admin" = ?
    AND "hireDate IS NOT NULL

If you had already wrapped your expression in a group inside the scope, whereHas, or whereDoesntHave call, nothing changes. Your code works as before. The OR combinator check only works on the top most level of added where clauses. Additionally, if you do not add any where clauses inside your scope, nothing changes.

The breaking change part is if you were relying on these statements residing at the same level without grouping. If so, you will need to group your changes into a single scope where you control the grouping or do the querying at the builder level outside of scopes.

3.0.0

Adobe ColdFusion 11 and Lucee 4.5 are no longer supported

Please migrate to a supported engine.

Virtual Inheritance support removed

Virtual Inheritance allowed you to use a quick annotation on your entity instead of extending quick.models.BaseEntity. This was hardly used and didn't offer any benefit to extending using traditional inheritance. Additionally, removing the support allows us to clean up the code base by removing duplicate code paths.

If any of your entities are using the quick annotation, instead have them extends="quick.models.BaseEntity".

`accessors="true"` required for all entities

From the early days of Quick, developers have wanted to have accessors="true" on their entities. Because of this, Quick supported defining entities both with and without accessors. However, just as with virtual inheritance, it created two code paths that could hide bugs and make it hard to follow the code. In Quick 3.0.0, accessors="true" is required on all entities. If it is omitted, a helpful error message is thrown to remind you. This will help immensely in simplifying the code base. (In fact, just introducing this requirement helped find two bugs that were only present when using accessors.)

Ensure all entities have accessors="true" in their component metadata.

AssignedKey removed

Use NullKeyType instead.

Boolean casts updates to hook in to new Cast system

Previously, the only valid cast type was casts="boolean". In introducing the new Casts system, the boolean cast was refactored to use the same system. For this reason, any casts="boolean" needs to be changed to casts="BooleanCast@quick"

defaultGrammar updated to be the full WireBox mapping

In previous versions, the value passed to defaultGrammar was used to look up a mapping in the @qb namespace. This made it difficult to add or use grammars that weren't part of qb. (You could get around this be registering your custom grammar in the @qb namespace, but doing so seemed strange.)

To migrate this code, change your defaultGrammar to be the full WireBox mapping in your moduleSettings:

moduleSettings = {
    "quick": {
        "defaultGrammar": "SqlServerGrammar@qb"
    }
};

HasManyThrough relationship re-tooled to be based on relationships

It no longer accepts any entities or columns. Rather, it accepts an array of relationships to walk "through" to end up at the desired entity.

Here's how the old syntax would be used to define the relationship between Country and Post.

component extends="quick.models.BaseEntity" {

    function posts() {
        return hasManyThrough( "Post", "User", "country_id", "user_id" );
    }

}

This same relationship now needs to be defined in terms of other relationships, like so.

component extends="quick.models.BaseEntity" {

    function posts() {
        return hasManyThrough( [ "users", "posts" ] );
    }

    function users() {
        return hasMany( "User" );
    }

}

component extends="quick.models.BaseEntity" {

    function posts() {
        return hasMany( "Post" );
    }

}

This approach does require a relationship defined for each level, but it works up and down any number of relationships to get to your desired entity.

`associate` cannot be called on unloaded entities

To update the foreign key of a belongsTo relationship you use the associate method. In the past, it was possible to associate a new, unsaved child entity to its parent using this method.

var newChild = getInstance( "Child" );
newChild.fill( fields );
newChild.parent().associate( parent );
newChild.save();

In an attempt to provide more helpful error messages, this behavior is no longer possible. You can achieve the same effect in one of two ways.

The first is to manually assign the foreign keys:

var newChild = getInstance( "Child" );
newChild.fill( fields );
newChild.setParentKey( parent.getId() );
newChild.save();

While this works, it breaks the encapsulation provided by the relationship.

The second approach is to use the hasOne or hasMany side of the relationship to create the new child entity:

var newChild = getInstance( "Child" );
newChild.fill( fields );
var parent = getInstance( "Parent" ).findOrFail( id );
parent.children().save( newChild );

If you have all the data handy in a struct, you can use the create method for a more concise syntax.

var parent = getInstance( "Parent" ).findOrFail( id );
var newChild = parent.children().create( fields );

This is the recommended way of creating these components.

assignAttributesData argument renamed to `attributes`

This brings the API in line with the other methods referencing attributes.

Method changes due to compound key support

Compound key support required some method and parameter name changes. Although the list seems extensive, you will likely not need to change anything in your code unless you have extended built-in Quick components. (You will see many relationship parameter name changes. Note that the function you call to define a relationship is a function on the BaseEntity and has not changed its signature.)

BaseEntity.cfc:

• retrieveQualifiedKeyName : String -> retrieveQualifiedKeyNames : [String]

• keyName : String -> keyNames : [String]

• keyColumn : String -> keyColumns : [String]

• keyValue : String -> keyValues : [String]

AutoIncrementingKeyType.cfc

• This cannot be used with composite primary keys

BaseRelationship.cfc

• getKeys now takes an array of keys as the second argument

• getQualifiedLocalKey : String -> getQualifiedLocalKeys : [String]

• getExistenceCompareKey : String -> getExistenceCompareKeys : [String]

BelongsTo.cfc

• init arguments have changed

  • foreignKey : String -> foreignKeys : [String]

  • localKey : String -> localKeys : [String]

• getQualifiedLocalKey : String -> getQualifiedLocalKeys : [String]

• getExistenceCompareKey : String -> getExistenceCompareKeys : [String]

BelongsToMany.cfc

• init arguments have changed

  • foreignPivotKey : String -> foreignPivotKeys : [String]

  • relatedPivotKey : String -> relatedPivotKeys : [String]

  • parentKey : String -> parentKeys : [String]

  • relatedKey : String -> relatedKeys : [String]

• getQualifiedRelatedPivotKeyName : String -> getQualifiedRelatedPivotKeyNames : [String]

• getQualifiedForeignPivotKeyName : String -> getQualifiedForeignPivotKeyNames : [String]

• getQualifiedForeignKeyName : String -> getQualifiedForeignKeyNames : [String]`

HasManyThrough.cfc

• This component now extends quick.models.Relationships.HasOneOrManyThrough

• init arguments are now as follows:

  • related: The related entity instance.

  • relationName: The WireBox mapping for the related entity.

  • relationMethodName: The method name called to retrieve this relationship.

  • parent: The parent entity instance for the relationship.

  • relationships: An array of relationships between the parent entity and the related entity.

  • relationshipsMap: A dictionary of relationship name to relationship component.

• The following methods no longer exist:

  • getQualifiedFarKeyName

  • getQualifiedForeignKeyName

  • getQualifiedFirstKeyName

  • getQualifiedParentKeyName

HasOneOrMany.cfc

• init arguments have changed

  • foreignKey : String -> foreignKeys : [String]

  • localKey : String -> localKeys : [String]

• getParentKey : any -> getParentKeys : [any]

• getQualifiedLocalKey : String -> getQualifiedLocalKeys : [String]

• getQualifiedForeignKeyName : String -> getQualifiedForeignKeyNames : [String]

PolymorphicBelongsTo.cfc

• init arguments have changed

  • foreignKey : String -> foreignKeys : [String]

  • localKey : String -> localKeys : [String]

PolymorphicHasOneOrMany.cfc

• init arguments have changed

  • id : String -> ids : [String]

  • localKey : String -> localKeys : [String]

2.0.0

Quick 2.0 brings with it a lot of changes to make things more flexible and more performant. This shouldn't take too long — maybe 2-5 minutes per entity.

Internal properties renamed

There were some common name clashes between internal Quick properties and custom attributes of your entities (the most common being fullName). All Quick internals have been obfuscated to avoid this situation. If you relied on these properties, please consult the following table below for the new property names.

Additionally, some method names have also changed to avoid clashing with automatically generated getters and setters. Please consult the table below for method changes.

Lastly, the following properties and methods have been removed:

Key Types

Defining Key Types

Key Types are the way to define setting and retrieving a primary key in Quick. In Quick 1.0 these were injected in to the component. This made reusability hard for simple things like sequence names. In order to allow for more flexible key types, key types are no longer injected. Instead, they should be returned from a keyType method.

function keyType() {
    return variables._wirebox.getInstance( "Sequence@quick" )
        .setSequenceName( "seq_users" );
}

The keyType is lazily created and cached on the component, so this is both a more flexible approach as well as being more performant. If you are injecting custom key types in your entities you will need to move them to the method syntax.

Changed Key Types

A few key types have been renamed and will need to be updated in your codebase:

New Key Types

In additional to the changes to defining key types, there is a few new key types introduced in Quick 2.0.

ReturningKeyType

Used with grammars that return their primary key in the query response when inserting to the database. An example of this is NEWSEQUENTIALID in Microsoft SQL Server.

Scopes

The way arguments are passed to scopes have been updated to allow for default arguments. query is still the first argument. Other arguments will be passed in order after that. The args struct is no longer passed.

Relationships

The relationship methods are still named the same but some of the arguments have been changed to fix bugs and support better eager loading performance. Please check the relationship docs for more details.

Additionally, the alternative syntax for defining relationships on a relationships struct has been removed. It created an unnecessary code path that had it's own share of bugs. All relationships should be defined as methods on the entity.

Removing CFCollection

CFCollection was included in Quick 1.0 as both a way to lazily eager load a relationship and as a compatibility layer for older CF versions. The compatibility that CFCollection provides, however, comes with a performance cost. Additionally, the majority of users wanted to use plain arrays as the return format. For those reasons, arrays are now the default return format for collections. CFCollections can still be used by specifying a different return format in the module settings.

Converting to Null

Null is a tricky thing in CFML. The same goes for interacting with nulls in a database. By default, we will support the CFML convention of using an empty string to represent null. When interacting with the database empty strings will be converted to nulls. You can adjust this behavior on the property level with two new annotations:

• convertToNull - Determines if the property will be automatically checked to convert to null at all. Defaults to true.

• nullValue - This is the value that is equivalent to null for this property. Defaults to an empty string.

Returning Null instead of Unloaded Entities

In an effort to avoid dealing with CFML's version of null, Quick originally returned unloaded entities. You could check if an entity was loaded using the isLoaded method. This doesn't make as much sense as null however and even made it more difficult to interact with other libraries. Now Quick will return null when it encounters an empty query result either from a retrieval or from a belongsTo or hasOne relationship. Any instances that you were checking isLoaded should be updated. isLoaded will continue to exist for when you are creating a new entity not from the database.

AutoDiscover Grammar

The default grammar for Quick is now AutoDiscover. This provides a better first run experience. The grammar can still be set in the moduleSettings.

BaseService

As a new way to interact with Quick, you can use Quick Services to interact with your entities in a service-oriented fashion. These are equivalent to VirtualEntityServices in cborm.

The easiest way to use a Quick Service is to use the quickService: injection dsl.

component {
    property name="userService" inject="quickService:User";
}

All methods available on the Quick entity are available on the service.

Eager Loading

Eager loading is now supported for nested relationships using a dot-separated syntax. Additionally, constraints can be added to an eager loaded relationship. See the docs on eager loading for more information.

Column Aliases in Queries

Column aliases can now be used in queries. They will be transformed to columns before executing the query.

Quick entities in Setters

If you pass a Quick entity to a setter method the entity's keyValue value will be passed.

Update and Insert Guards

Columns can be prevented from being inserted or updated using property attributes — insert="false" and update="false".

cbvalidation removed as a default dependency

Quick no longer automatically validates entities before saving them. Having cbvalidation baked in made it hard to extend it. If desired, validation can be added back in using Quick's lifecycle hooks.

instanceReady Lifecycle Method

Quick now announces an instanceReady event after the entity has gone through dependency injected and had its metadata inspected. This can be used to hook in other libraries, like cbvalidation and mementifier.

Automatic Attribute Casting

You can automatically cast a property to a boolean value while retrieving it from the database and back to a bit value when serializing to the database by setting casts="boolean" on the property.

isLoaded

Checks if the entity was loaded from the database.

A loaded entity has a tie to the database. It has either been loaded from the database or saved to the database. An unloaded entity is one created in code but not saved to the database yet.

var user = getInstance( "User" );
user.isLoaded(); // false
user.save();
user.isLoaded(); // true

6.1.0

Introducing the asQuery method

This method is similar to asMemento. You use it when the return format you want is an array of structs. asQuery will skip creating entities at all, instead returning the values straight from qb. This can result in a large performance boost depending on the number of records being returned. Additionally, asQuery supports returning the columns using the alias names and returning eager loaded entities.

Read more in the asQuery docs.

6.0.0

• Add compatibility with ColdBox 7.

• Fixed a bug where once a virtual attribute was added to an entity it was added to all future entities of that same type.

• Dropped support for ColdBox 5.

5.3.3

Use correct nesting for where statements

5.3.2

Fixed retrieving null values from fields and relationships

5.3.1

• Special handling for Lucee generated keys

• Workaround for adobe@2021 not supporting null values in param statements

• Upgrade to latest cfmigrations (v4.0.0)

5.3.0

Add a way to not fire events inside a callback using withoutFiringEvents.

5.2.11

Upgrade to qb 9

5.2.10

HasOneOrManyThrough: Fix too many joins for has and whereHas

5.2.9

HasOneOrManyThrough: Fixed applying of through constraints BaseEntity: Use wirebox to get the util to work in CommandBox

5.2.8

Fix bad link to Getting Started guide

5.2.7

Use existing builder when adding subselects

5.2.6

Update to latest mementifier (v3.0.0)

5.2.5

CommandBox compatibility

5.2.4

Force generated key to be an integer.

5.2.3

CommandBox-friendly injections using the box namespace.

5.2.2

Fixed regression where eager loading inside a relationship was broken.

5.2.1

Fixed accessing QuickBuilder from entities and relationships.

5.2.0

Add include and exclude arguments to fill method.

5.1.3

Always return numeric value for AutoIncrementingKeyType.

5.1.2

Add the builder to the preInsert method for ReturningKeyType.

5.1.1

Set the table when creating new queries.

5.1.0

Added support for single-table inheritance (STI) with discriminated subclass entities.

5.0.0

In 5.0.0, we stepped up the performance of Quick in a major way. Entity creation is now over twice as fast as before.

Performance Improvements

Average duration to create one entity:

While the times may seem small, this is compounded for each entity you create. So, if you are retrieving 1000 entities, multiply each of these numbers by 1000 and you'll start to see why this matters.

This did introduce one breaking change from v4. See the Upgrade Guide for more information.

New Features

• Added a new RowIDKeyType that will correctly set your primary key if your database only returns ROWID in the queryExecute response.

Bug Fixes

• Fixed a null check in isNullValue.

• Fixed nulls coming back as strings in JsonCast.

4.2.0

• Add a simplePaginate pagination method for quicker performance when total records or total pages are not needed or too slow.

4.1.6

• Configure columns are no longer cleared when setting up a BelongsToMany relationship.

4.1.5

• Provide initialThroughConstraints for hasOne relationships (used in *Through relationships).

4.1.4

• Ignore orders when retrieving a relationship count.

4.1.1, 4.1.2

• Preserve casted value after saving an entity.

4.1.0

• Allow for child entities, including discriminated entities.

• Look up returning values by column name not by alias in the ReturningKeyType.

4.0.2

• Skip eager loading database call when no keys are found.

• Only apply CONCAT when needed in *Through relationships.

4.0.1

• Use WHERE EXISTS over DISTINCT when fetching relationships. DISTINCT restricts some of the queries that can be run.

4.0.0

BREAKING CHANGES

• Scopes, whereHas, and whereDoesntHave callbacks now automatically group where clauses when an OR combinator is detected.

Other Changes

• Dynamically add relationship counts to a parent entity without loading all of the relationship.

• Give a helpful error message when trying to set relationship values before saving an entity, where applicable.

• Multiple bug fixes related to subselects and querying relationships when using belongsToThrough, hasOneThrough, or hasManyThrough.

3.1.7

• Correct jQuery link in test runner.

3.1.6

• Allow expressions in basic where clauses.

• Fix delete naming collision.

3.1.5

• Add an alias to with to QuickBuilder.

3.1.4

• Fix a stack overflow on nested relationship checks.

3.1.3

• Configured tables (.from) are now used for qualifying columns.

3.1.2

• Remove unnecessary nesting in compare queries.

3.1.1

• Fix querying relationship methods when using "OR" combinators.

3.1.0

• Add support for JSON casting using a new JsonCast@quick component.

3.0.4

• Compatibility updates for ColdBox 6

3.0.3

• Optimize cast caching

3.0.2

• Apply custom sqltypes during eager loading.

3.0.1

• Account for null values in fill.

• Swap structAppend order for a Lucee bug in mementifier integration.

3.0.0

BREAKING CHANGES

Please see the Upgrade Guide for more information on these changes.

• Drop support for Lucee 4.5 and Adobe ColdFusion 11.

• Virtual Inheritance (using a quick annotation instead of extending quick.models.BaseEntity) has been removed. It was hardly used, and removing it allows us to simplify some of the code paths.

• accessors="true" is now required on every entity. This is similar to above where requiring it allows us to simplify the codebase immensely. A helpful error message will be thrown if accessors="true" is not present on your entity.

• The defaultGrammar mapping needs to be the full WireBox mapping, including the @qb, if needed.

  • For instance, MSSQLGrammar would become MSSQLGrammar@qb.

  • This will allow for other grammars to be more easily contributed via third party modules.

• HasManyThrough relationships now only accept a relationships parameter of relationship methods to walk to get to the intended entity.

• Attributes using casts="boolean" need to be updated to casts="BooleanCast@quick".

• Some method and parameter names have been changed to support composite keys. The majority of changes will only affect you if you have extended base Quick components. The full list can be found in the Upgrade Guide.

Other Changes

• Bundle Mementifier for memento transformations.

• Use asMemento to automatically convert queries to mementos.

• Automatically-generated API docs.

• Add error message for defaulting key values.

• Update to qb 7.0.0.

• Add a belongsToThrough relationship.

• Add a HasOneThrough relationship.

• Custom Casts - using custom components to represent one or more attributes.

• Ordering by relationship attributes.

• addSubselect improvements.

• Add a new QuickBuilder to better handle interop with qb.

• Add exists and existsOrFail methods.

• Allow custom error messages for orFail methods.

• Ensure loadRelationship doesn't reload existing relationships.

• Add multiple retrieve or new/create methods - firstWhere, firstOrNew, firstOrCreate, findOrNew, and findOrCreate.

• Add paginate to Quick.

• Add is and isNot to compare entities.

• Allow hydrating entities from serialized data.

• Allow returning default entities for null relations on HasOne, BelongsTo, HasOneThrough, and BelongsToThrough relationships.

• Query relations using has, doesntHave, whereHas, and whereDoesntHave.

• Split reset into reset and resetToNew methods.

• Store the original attributes for later resetting.

• Use parameterLimits to eager load.

• Use a new entity each time on BaseService.

• Apply sql types for columns to wheres.

• Apply global scopes more consistently

• Correctly ignore key column when updating.

• Fix hasRelationship method to only return true for exact matches.

• Better handling of constrained relationships when eager loading.

• Convert aliases when qualifying columns.

• Add a better error message if onMissingMethod fails.

• Only retrieve columns for defined attributes.

• Cache entity metadata in CacheBox.

• Use attribute hash for checking isDirty.

2.5.0

• Define custom collections per entity.

2.4.0

• Apply custom setters when hydrating from the database. (Reverted in 2.5.3 for unintended consequences with things like password hashing.)

• Query scopes can return any value. This allows you to use scopes to perform query functions and return values. (If you do not want to return a custom value, return the QueryBuilder instance or nothing.)

• Improve error messages for not loaded entities.

• Return the correct memento with accessors on.

2.3.0

• Option to ignore non-existent attributes

2.2.0

• Relationship Fetch Methods (first and find methods)

2.1.0

• Subselect Helper

• Global Scopes

• saveMany

• Mapping foreign keys for relationships is now optional

• Either entities or primary key values can be passed to relationship persistance methods

• Relationships can also be saved by calling "set" & relationshipName

• Virtual Inheritance works on ColdBox 5.2+

Configure a default datasource in your CFML engine

You can do this any way you'd like: through the web admin, in Application.cfc, or using cfconfig.

Make sure to set this.datasource in your Application.cfc so Quick knows which datasource to use.

Download Quick

The easiest way to download Quick is to use ForgeBox with CommandBox. Just run the following from the root of your application:

box install quick

Add a mapping for quick in your Application.cfc

For a default installation in a ColdBox template, the following line will do the trick.

this.mappings[ "/quick" ] = COLDBOX_APP_ROOT_PATH & "/modules/quick";

Configure your defaultGrammar in config/ColdBox.cfc

Quick will auto discover your grammar by default on startup. To avoid this check, set a BaseGrammar.

defaultGrammar is a module setting for Quick. Set it in your config/ColdBox.cfc like so:

moduleSettings = {
    quick = {
        defaultGrammar = "MySQLGrammar@qb"
    }
};

Valid options are any of the qb supported grammars. At the time of writing valid grammar options are: MySQLGrammar@qb, PostgresGrammar@qb, SqlServerGrammar@qb and OracleGrammar@qb. You can also have qb discover your grammar on application init using AutoDiscover@qb. Please check the qb docs for additional options.

If you want to use a different datasource and/or grammar for individual entitities you can do so by adding some metadata attributes to your entities.

Coming from <cfquery> or queryExecute?

You might be thinking, I don't need an ORM engine. I don't even know what ORM means! I know SQL backwards and forwards so there's nothing an ORM can offer me. Maybe you've had experience with other ORM engines, whether CFML-based or not, and the experience was less that ideal. Why should you consider Quick?

Quick's ORM philosophy comes down to three main points:

1. Give relevant names to important collections of SQL code. (scopes, relationships, etc.)

2. Make queries easy to compose at runtime to get the exact data you want in the most efficient way (subselects, eager loading, etc.)

3. Get out of your way when you need or want to write barebones SQL.

Coming from Hibernate?

Quick was built out of lessons learned and persistent challenges in developing complex RDBMS applications using built-in Hibernate ORM in CFML.

• Hibernate ORM error messages often obfuscate the actual cause of the error

  because they are provided directly by the Java classes.

• Complex CFML Hibernate ORM applications can consume significant memory and

  processing resources, making them cost-prohibitive and inefficient when used

  in microservices architecture.

• Hibernate ORM is tied to the engine releases. This means that updates come

  infrequently and may be costly for non-OSS engine users.

• Hibernate ORM is built in Java. This limits contributions from CFML

  developers who don't know Java or don't feel comfortable contributing to a

  Java project.

• Hibernate ORM doesn't take advantage of a lot of dynamic- and

  meta-programming available in CFML. (Tools like CBORM have helped to bridge

  this gap.)

We can do better.

To get started with Quick, you need an entity. You start by extending quick.models.BaseEntity.

// User.cfc
component extends="quick.models.BaseEntity" accessors="true" {}

That's all that is needed to get started with Quick. There are a few defaults of Quick worth mentioning here.

Tables

We don't need to tell Quick what table name to use for our entity. By default, Quick uses the pluralized, snake_cased name of the component for the table name. That means for our User entity Quick will assume the table name is users. For an entity with multiple words like PasswordResetToken the default table would be password_reset_tokens. You can override this by specifying a table metadata attribute on the component.

// User.cfc
component table="t_users" extends="quick.models.BaseEntity" accessors="true" {}

Inheritance

For more information on using inheritance and child tables in your relational database model, see Subclass Entities.

Primary Key

By default, Quick assumes a primary key of id. The name of this key can be configured by setting variables._key in your component.

// User.cfc
component extends="quick.models.BaseEntity" accessors="true" {

    variables._key = "user_id";

}

Quick also assumes a key type that is auto-incrementing. If you would like a different key type, override thekeyType function and return the desired key type from that function.

// User.cfc
component extends="quick.models.BaseEntity" accessors="true" {

    function keyType() {
        return variables._wirebox.getInstance( "UUIDKeyType@quick" );
    }

}

Quick ships with the following key types:

• AutoIncrementingKeyType

• NullKeyType

• ReturningKeyType

• UUIDKeyType

• RowIDKeyType

keyType can be any component that adheres to the keyType interface, so feel free to create your own and distribute them via ForgeBox.

interface displayname="KeyType" {

    /**
    * Called to handle any tasks before inserting into the database.
    * Recieves the entity as the only argument.
    */
    public void function preInsert( required entity );

    /**
    * Called to handle any tasks after inserting into the database.
    * Recieves the entity and the queryExecute result as arguments.
    */
    public void function postInsert( required entity, required struct result );

}

Attributes

You specify what attributes are retrieved by adding properties to your component.

// User.cfc
component extends="quick.models.BaseEntity" accessors="true" {

    property name="id";
    property name="username";
    property name="email";

}

Now, only the id, username, and email attributes will be retrieved.

Persistent

To prevent Quick from mapping a property to a database column add the persistent="false" attribute to the property. This is needed mostly when using dependency injection.

// User.cfc
component extends="quick.models.BaseEntity" accessors="true" {

    property name="bcrypt" inject="@BCrypt" persistent="false";

    property name="id";
    property name="username";
    property name="email";

}

Column

If the column name in your table is not the column name you wish to use in Quick, you can specify the column name using the column metadata attribute. The attribute will be available using the name of the attribute.

component extends="quick.models.BaseEntity" accessors="true" {

    property name="id";
    property name="username" column="user_name";
    property name="countryId" column="FK_country_id";

}

Null Values

To work around CFML's lack of null, you can use the nullValue and convertToNull attributes.

nullValue defines the value that is considered null for a attribute. By default it is an empty string. ("")

convertToNull is a flag that, when false, will not try to insert null in to the database. By default this flag is true.

component extends="quick.models.BaseEntity" accessors="true" {

    property name="id";
    property name="number" convertToNull="false";
    property name="title" nullValue="REALLY_NULL";

}

Read Only

The readOnly attribute will prevent setters, updates, and inserts to a attribute when set to true.

component extends="quick.models.BaseEntity" accessors="true" {

    property name="id";
    property name="createdDate" readonly="true";

}

SQL Type

In some cases you will need to specify an exact SQL type for your attribute. Any value set for the sqltype attribute will be used when inserting or updating the attribute in the database. It will also be used when you use the attribute in a where constraint.

component extends="quick.models.BaseEntity" accessors="true" {

    property name="id";
    property name="number" sqltype="cf_sql_varchar";

}

Casts

The casts attribute allows you to use a value in your CFML code as a certain type while being a different type in the database. A common example of this is a boolean which is usually represented as a BIT in the database.

Two casters ship with Quick: BooleanCast@quick and JsonCast@quick. You can add them using those mappings to any applicable columns.

Custom Casts

The casts attribute must point to a WireBox mapping that resolves to a component that implements the quick.models.Casts.CastsAttribute interface. (The implements keyword is optional.) This component defines how to get a value from the database in to the casted value and how to set a casted value back to the database. Below is an example of the built-in BooleanCast, which comes bundled with Quick.

// User.cfc
component extends="quick.models.BaseEntity" accessors="true" {

    property name="id";
    property name="active" casts="BooleanCast@quick";

}

// BooleanCast.cfc
component implements="CastsAttribute" {

    /**
     * Casts the given value from the database to the target cast type.
     *
     * @entity      The entity with the attribute being casted.
     * @key         The attribute alias name.
     * @value       The value of the attribute.
     *
     * @return      The casted attribute.
     */
    public any function get(
        required any entity,
        required string key,
        any value
    ) {
        return isNull( arguments.value ) ? false : booleanFormat( arguments.value );
    }

    /**
     * Returns the value to assign to the key before saving to the database.
     *
     * @entity      The entity with the attribute being casted.
     * @key         The attribute alias name.
     * @value       The value of the attribute.
     *
     * @return      The value to save to the database. A struct of values
     *              can be returned if the cast value affects multiple attributes.
     */
    public any function set(
        required any entity,
        required string key,
        any value
    ) {
        return arguments.value ? 1 : 0;
    }

}

Casted values are lazily loaded and cached for the lifecycle of the component. Only cast values that have been loaded will have set called on them when persisting to the database.

Casts can be composed of multiple fields as well. Take this Address value object, for example:

// Address.cfc
component accessors="true" {

    property name="streetOne";
    property name="streetTwo";
    property name="city";
    property name="state";
    property name="zip";

    function fullStreet() {
        var street = [ getStreetOne(), getStreetTwo() ];
        return street.filter( function( part ) {
            return !isNull( part ) && part != "";
        } ).toList( chr( 10 ) );
    }

    function formatted() {
        return fullStreet() & chr( 10 ) & "#getCity()#, #getState()# #getZip()#";
    }

}

This component is not a Quick entity. Instead it represents a combination of fields stored on our User entity:

component extends="quick.models.BaseEntity" accessors="true" {

    property name="id";
    property name="username";
    property name="firstName" column="first_name";
    property name="lastName" column="last_name";
    property name="password";

    property name="address"
        casts="AddressCast"
        persistent="false"
        getter="false"
        setter="false";
    property name="streetOne";
    property name="streetTwo";
    property name="city";
    property name="state";
    property name="zip";

}

Noticed that the casted address is neither persistent nor does it have a getter or setter created for it.

The last piece of the puzzle is our AddressCast component that handles casting the value to and from the native database values:

component implements="quick.models.Casts.CastsAttribute" {

    property name="wirebox" inject="wirebox";

    /**
     * Casts the given value from the database to the target cast type.
     *
     * @entity      The entity with the attribute being casted.
     * @key         The attribute alias name.
     * @value       The value of the attribute.
     * @attributes  The struct of attributes for the entity.
     *
     * @return      The casted attribute.
     */
    public any function get(
        required any entity,
        required string key,
        any value
    ) {
        return wirebox.getInstance( dsl = "Address" )
            .setStreetOne( entity.retrieveAttribute( "streetOne" ) )
            .setStreetTwo( entity.retrieveAttribute( "streetTwo" ) )
            .setCity( entity.retrieveAttribute( "city" ) )
            .setState( entity.retrieveAttribute( "state" ) )
            .setZip( entity.retrieveAttribute( "zip" ) );
    }

    /**
     * Returns the value to assign to the key before saving to the database.
     *
     * @entity      The entity with the attribute being casted.
     * @key         The attribute alias name.
     * @value       The value of the attribute.
     * @attributes  The struct of attributes for the entity.
     *
     * @return      The value to save to the database. A struct of values
     *              can be returned if the cast value affects multiple attributes.
     */
    public any function set(
        required any entity,
        required string key,
        any value
    ) {
        return {
            "streetOne": arguments.value.getStreetOne(),
            "streetTwo": arguments.value.getStreetTwo(),
            "city": arguments.value.getCity(),
            "state": arguments.value.getState(),
            "zip": arguments.value.getZip()
        };
    }

}

You can see that returning a struct of values from the set function assigns multiple attributes from a single cast.

Insert & Update

You can prevent inserting and updating a property by setting the insert or update attribute to false.

component extends="quick.models.BaseEntity" accessors="true" {

    property name="id";
    property name="email" column="email" update="false" insert="true";

}

Formula, Computed, or Subselect properties

Quick handles formula, computed, or subselect properties using query scopes and the addSubselect helper method. Check out the docs in query scopes to learn more.

Multiple datasource support

Quick uses a default datasource and default grammar, as described here. If you are using multiple datasources you can override default datasource by specifying a datasource metadata attribute on the component. If your extra datasource has a different grammar you can override your grammar as well by specifying a grammar attribute.

// User.cfc
component
    datasource="myOtherDatasource"
    grammar="PostgresGrammar@qb"
    extends="quick.models.BaseEntity"
    accessors="true"
{
    // ....
}

At the time of writing Valid grammar options are: MySQLGrammar@qb, PostgresGrammar@qb, SqlServerGrammar@qb and OracleGrammar@qb. Please check the qb docs for additional options.

Comparing Entities

You can compare entities using the isSameAs and isNotSameAs methods. Each method takes another entity and returns true if the two objects represent the same entity.

var userOne = getInstance( "User" ).findOrFail( 1 );
var userTwo = getInstance( "User" ).findOrFail( 1 );

userOne.isSameAs( userTwo ); // true
userOne.isNotSameAs( userTwo ); // false

What are Scopes?

Query scopes are a way to encapsulate query constraints in your entities while giving them readable names .

A Practical Example

For instance, let's say that you need to write a report for subscribers to your site. Maybe you track subscribers in a users table with a boolean flag in a subscribed column. Additionally, you want to see the oldest subscribers first. You keep track of when a user subscribed in a subscribedDate column. Your query might look as follows:

var subscribedUsers = getInstance( "User" )
    .where( "subscribed", true )
    .orderBy( "subscribedDate" )
    .get();

Now nothing is wrong with this query. It retrieves the data correctly and you continue on with your day.

Later, you need to retrieve a list of subscribed users for a different part of the site. So, you write a query like this:

var subscribedUsers = getInstance( "User" )
    .where( "subscribed", true )
    .get();

We've duplicated the logic for how to retrieve active users now. If the database representation changed, we'd have to change it in multiple places. For instance, what if instead of keeping track of a boolean flag in the database, we just checked that the subscribedDate column wasn't null?

var subscribedUsers = getInstance( "User" )
    .whereNotNull( "subscribedDate" )
    .get();

Now we see the problem. Let's look at the solution.

The key here is that we are trying to retrieve subscribed users. Let's add a scope to our User entity for subscribed:

component extends="quick.models.BaseEntity" accessors="true" {

    function scopeSubscribed( query ) {
        return query.where( "subscribed", true );
    }

}

Now, we can use this scope in our query:

var subscribedUsers = getInstance( "User" )
    .subscribed()
    .get();

We can use this on our first example as well, for our report.

var subscribedUsers = getInstance( "User" )
    .subscribed()
    .orderBy( "subscribedDate" )
    .get();

We've successfully encapsulated our concept of a subscribed user!

We can add as many scopes as we'd like. Let's add one for longestSubscribers.

component extends="quick.models.BaseEntity" accessors="true" {

    function scopeLongestSubscribers( query ) {
        return query.orderBy( "subscribedDate" );
    }

    function scopeSubscribed( query ) {
        return query.where( "subscribed", true );
    }

}

Now our query is as follows:

var subscribedUsers = getInstance( "User" )
    .subscribed()
    .longestSubscribers()
    .get();

Best of all, we can reuse those scopes anywhere we see fit without duplicating logic.

Usage

All query scopes are methods on an entity that begin with the scope keyword. You call these functions without the scope keyword (as shown above).

Each scope is passed the query, a reference to the current QuickBuilder instance, as the first argument. Any other arguments passed to the scope will be passed in order after that.

component extends="quick.models.BaseEntity" accessors="true" {

    function scopeOfType( query, type ) {
        return query.where( "type", type );
    }

}

var subscribedUsers = getInstance( "User" )
    .ofType( "admin" )
    .get();

Scopes that Return Values

All of the examples so far either returned the QuickBuilder object or nothing. Doing so lets you continue to chain methods on your Quick entity. If you instead return a value, Quick will pass on that value to your code. This lets you use scopes as shortcut methods that work on a query.

For example, maybe you have a domain method to reset passwords for a group of users, and you want the count of users updated returned.

component extends="quick.models.BaseEntity" accessors="true" {

    property name="id";
    property name="username";
    property name="password";
    property name="type";

    function scopeOfType( query, type = "limited" ) {
        return query.where( "type", type );
    }

    function scopeResetPasswords( query ) {
        return query.updateAll( { "password" = "" } ).result.recordcount;
    }

}

getInstance( "User" ).ofType( "admin" ).resetPasswords(); // 1

Global Scopes

Occasionally, you want to apply a scope to each retrieval of an entity. An example of this is an Admin entity which is just a User entity with a type of admin. Global Scopes can be registered in the applyGlobalScopes method on an entity. Inside this entity you can call any number of scopes:

component extends="User" table="users" accessors="true" {

    function applyGlobalScopes( qb ) {
        qb.ofType( "admin" );
    }

}

These scopes will be applied to the query without needing to call the scope again.

var admins = getInstance( "Admin" ).all();
// SELECT * FROM users WHERE type = 'admin'

To temporarily disable global scopes that have been applied to an entity, you have the option to disable them individually or all at once by utilizing the withoutGlobalScope method.

// disable all global scopes
var admins = getInstance( "Admin" ).withoutGlobalScope().all();

// selectively disable global scopes
var admins = getInstance( "Admin" ).withoutGlobalScope( [ "ofType" ] ).all();

// SELECT * FROM users

Subselects

Subselects are a useful way to grab data from related tables without having to execute the full relationship. Sometimes you just want a small piece of information like the lastLoginDate of a user, not the entire Login relationship. Subselects are perfect for this use case. You can even use subselects to provide the correct key for dynamic subselect relationships. We'll show how both work here.

Quick handles subselect properties (or computed or formula properties) through query scopes. This allows you to dynamically include a subselect. If you would like to always include a subselect, add it to your entity's list of global scopes.

Here's an example of grabbing the lastLoginDate for a User:

component extends="quick.models.BaseEntity" accessors="true" {

    /* properties */

    function logins() {
        return hasMany( "Login" ).latest();
    }

    function scopeAddLastLoginDate( qb ) {
        qb.addSubselect( "lastLoginDate", newEntity( "Login" )
            .select( "timestamp" )
            .whereColumn( "users.id", "user_id" )
        );
    }

}

We'd add this subselect by calling our scope:

var user = getInstance( "User" ).addLastLoginDate().first();
user.getLastLoginDate(); // {ts 2019-05-02 08:24:51}

We can even constrain our User entity based on the value of the subselect, so long as we've called the scope adding the subselect first (or made it a global scope).

 var user = getInstance( "User" )
     .addLastLoginDate()
     .where( "lastLoginDate", ">", "2019-05-10" )
     .all();

Or add a new scope to User based on the subselect:

function scopeLoggedInAfter( qb, required date afterDate ) {
    return qb.where( "lastLoginDate", ">", afterDate );
}

In this example, we are using the addSubselect helper method. Here is that function signature:

You might be wondering why not use the logins relationship? Or even logins().latest().limit( 1 ).get()? Because that executes a second query. Using a subselect we get all the information we need in one query, no matter how many entities we are pulling back.

Using Relationships in Subselects

In most cases the values you want as subselects are values from your entity's relationships. In these cases, you can use a shortcut to define your subselect in terms of your entity's relationships represented as a dot-delimited string.

Let's re-write the above subselect for lastLoginDate for a User using the existing relationship:

component extends="quick.models.BaseEntity" accessors="true" {

    /* properties */

    function logins() {
        return hasMany( "Login" );
    }

    function scopeAddLastLoginDate( qb ) {
        qb.addSubselect( "lastLoginDate", "logins.timestamp" );
    }

}

Much simpler! In addition to be much simpler this code is also more dynamic and reusable. We have a relationship defined for logins if we need to fetch them. If we change how the logins relationship is structured, we only have one place we need to change.

With the query cleaned up using existing relationships, you might find yourself adding subselects directly in your handlers instead of behind scopes. This is fine in most cases. Keep an eye on how many places you use the subselect in case you need to re-evaluate and move it behind a scope.

var user = getInstance( "User" )
    .addSubselect( "lastLoginDate", "logins.timestamp" )
    .first();
user.getLastLoginDate(); // {ts 2019-05-02 08:24:51}

Dynamic Subselect Relationships

Subselects can be used in conjunction with relationships to provide a dynamic, constrained relationship. In this example we will pull the latest post for a user.

component extends="quick.models.BaseEntity" accessors="true" {

    /* properties */

    function scopeWithLatestPost( qb ) {
        return qb.addSubselect( "latestPostId", newEntity( "Post" )
            .select( "id" )
            .whereColumn( "user_id", "users.id" )
            .orderBy( "created_date", "desc" )
        ).with( "latestPost" );
    }

    function latestPost() {
        return belongsTo( "Post", "latestPostId" );
    }

}

This can be executed as follows:

var users = getInstance( "User" ).withLatestPost().all();
for ( var user in users ) {
    user.getLatestPost().getTitle(); // My awesome post, etc.
}

As you can see, we are loading the id of the latest post in a subquery and then using that value to eager load the latestPost relationship. This sequence will only execute two queries, no matter how many records are loaded.

Virtual Attributes

Virtual attributes are attributes that are not present on the table backing the Quick entity. A Subselect is an example of a virtual attribute. Other examples could include calculated counts or CASE statement results.

By default, if you add a virtual column to a Quick query, you won't see anything in the entity. This is because Quick needs to have an attribute defined to map the result to. You can create a virtual attribute in these cases.

Here's an example including the result of a CASE statement as a field:

// Post.cfc
component extends="quick.models.BaseEntity" accessors="true" {

    function scopeAddType( qb ) {
        qb.selectRaw( "
                CASE
                    WHEN publishedDate IS NULL THEN 'unpublished'
                    ELSE 'published'
                END AS publishedStatus
            " );
        appendVirtualAttribute( "publishedStatus" );
    }

}

With this code, we could now access the publishedStatus just like any other attribute. It will not be updated, inserted, or saved though, as it is just a virtual column.

The appendVirtualAttribute method adds the given name as an attribute available in the entity.

appendVirtualAttribute

Creates a virtual attribute for the given name.

save

New Quick entities can be created and persisted to the database by creating a new entity instance, setting the attributes on the entity, and then calling the save method.

var user = getInstance( "User" );
user.setUsername( "JaneDoe" );
user.setEmail( "jane@example.com" );
user.setPassword( "mypass1234" );
user.save();

When we call save, the record is persisted from the database and the primary key is set to the auto-generated value (if any).

We can shortcut the setters above using a fill method.

fill

Finds the first matching record or creates a new entity.

Sets attributes data from a struct of key / value pairs. This method does the following, in order:

1. Guard against read-only attributes.

2. Attempt to call a relationship setter.

3. Calls custom attribute setters for attributes that exist.

4. Throws an error if an attribute does not exist (if ignoreNonExistentAttributes is false which is the default).

var user = getInstance( "User" );
user.fill( {
    "username": "JaneDoe",
    "email": "jane@example.com",
    "password": "mypass1234"
} );
user.save();

populate

Populate is simply an alias for fill. Use whichever one suits you best.

create

Creates a new entity with the given attributes and then saves the entity.

var user = getInstance( "User" ).create( {
    "username": "JaneDoe",
    "email": "jane@example.com",
    "password": "mypass1234"
} );

There is no need to call save when using the create method.

firstOrNew

Finds the first matching record or returns an unloaded new entity.

var user = getInstance( "User" )
    .firstOrNew( { "username": rc.username } );

firstOrCreate

Finds the first matching record or creates a new entity.

var user = getInstance( "User" )
    .firstOrCreate( { "username": rc.username } );

findOrNew

Returns the entity with the id value as the primary key. If no record is found, it returns a new unloaded entity.

var user = getInstance( "User" ).findOrNew(
    9999,
      {
              "firstName" : "doesnt",
              "lastName"  : "exist"
      }
);

findOrCreate

Returns the entity with the id value as the primary key. If no record is found, it returns a newly created entity.

var user = getInstance( "User" ).findOrCreate(
    9999,
      {
        "username"  : "doesntexist",
              "firstName" : "doesnt",
              "lastName"  : "exist",
              "password"  : "secret"
      }
);

updateOrCreate

Updates an existing record or creates a new record with the given attributes.

var user = getInstance( "User" ).updateOrCreate( {
    "username": "newuser"
} );

Hydration Methods

Hydration is a term to describe filling an entity with a struct of data and then marking it as loaded, without doing any database queries. For example, this might be useful when hydrating a user from session data instead of doing a query every request.

hydrate

Hyrdates an entity from a struct of data. Hydrating an entity fills the entity and then marks it as loaded.

If the entity's keys are not included in the struct of data, a MissingHydrationKey is thrown.

var user = getInstance( "User" ).hydrate( {
    "id": 4,
    "username": "JaneDoe",
    "email": "jane@example.com",
    "password": "mypass1234"
} );

user.isLoaded(); // true

hydrateAll

Hydrates a new collection of entities from an array of structs.

var users = getInstance( "User" ).hydrateAll( [
    {
        "id": 3,
        "username": "JohnDoe",
        "email": "john@example.com",
        "password": "mypass4321"
    },
    {
        "id": 4,
        "username": "JaneDoe",
        "email": "jane@example.com",
        "password": "mypass1234"
    }
] );

By default, Quick supports basic component-level inheritance of entities, meaning that a child component inherits the properties ( and ability to overload ) its parent. A common, object-oriented relational database pattern, however is to provide additional definition on parent tables ( and classes ) within child tables which contain a foreign key.

Quick supports two types of child classes: Discriminated and Subclassed child entities. In both cases, loading any child class will also deliver the data of its parent class.

Subclass Entities

Let's say, for example, that I have a Media entity, which is used to catalog and organize all media items loaded in to my application.

component 
    table="media" 
    extends="quick.models.BaseEntity" 
    accessors="true"
{

    property name="id";
    property name="uploadFileName";
    property name="fileLocation";
    property name="fileSizeBytes";

}

My Media entity contains all of the properties which are common to every media item uploaded in to my application. Let's say, however, that I need to have specific attributes that are available on only media for my Book entity ( e.g. whether the image is the cover photo, for example ). I can create a child class of BookMedia which extends my Media entity. When loaded, all of the properties of Media will be loaded along with the custom attributes which apply to my BookMedia object:

component
    extends="Media"
    table="book_media"
    joinColumn="FK_media"
    accessors="true"
{
    property name="displayOrder";
    property name="designation";

    function approvalStatus(){
        return belongsTo( "Book", "FK_book" );
    }

}

Note the additional component attribute joincolumn. The presence of this attribute on a child class signifies that it is a child entity of the parent and that the parent's properties should be loaded whenever the BookMedia entity is loaded. In addition, the primary key of the entity is that of the parent.

Child entities can be retrieved by queries specific to their own properties:

var coverPhotos = getInstance( "BookMedia" )
                    .where( "designation", "cover" )
                    .orderBy( "displayOrder", "ASC" );

Or properties on the parent class can be used as first-class properties within the query:

var smallCoverPhotos = getInstance( "BookMedia" )
                    .where( "designation", "cover" )
                    .where( "fileSizeBytes", "<", 40000 )
                    .orderBy( "displayOrder", "ASC" )
                    .orderBy( "uploadFileName", "ASC" );

Child entities can be retrieved, individually, using the value of the joinColumn, which should be a foreign key to the parent identifier column:

var myBookMediaItem = getInstance( "BookMedia" ).get( myId );

Now my Book entity can use its extended media class to retrieve media items which are specific to its own purpose:

function media(){
    return hasMany( "BookMedia", "FK_book" ).orderBy( "displayOrder", "ASC" );
}

Discriminated Entities

A discriminated child class functions, basically, in the same way as a subclassed entity, with one exception: The parent entity is aware of the discriminated child due to a discriminatorValue attribute and will return a specific subclass when a retrieval is performed through the parent Entity. This pattern is also known as polymorphic association.

Quick supports two different types of discriminated entities defined by single-table inheritance (STI) or multi-table inheritance (MTI). Your database schema will determine the most appropriate inheritance pattern for your use case.

Let's take our BookMedia class again, but this time, define it as a discriminated entity.

The first step is to add the discriminatorColumn attribute to the Media entity, which is used to differentiate the subclass entities. Next, define an array of possible discriminated entities for the parent. This is so we don't have to scan all Quick components just to determine if there are any discriminated entities.

Then we set a discriminatorValue property on the child class, the value of which is stored in the parent entity table, which differentiates the different subclasses.

// Media (parent entity)
component 
    extends="quick.models.BaseEntity" 
    accessors="true"
    table="media" 
    discriminatorColumn="type" // the database column that determines the subclass
{

    property name="id";
    property name="uploadFileName";
    property name="fileLocation";
    property name="fileSizeBytes";
    
    // Array of all possible subclass entities
    variables._discriminators = [
        "BookMedia"
    ];

}

Then we set a discriminatorValue property on the child class, the value of which is stored in the parent entity table:

// BookMedia (subclass)
component
    extends="Media"
    accessors="true"
    discriminatorValue="book" // column value unique to this subclass
{
    property name="displayOrder";
    property name="designation";

}

We aren’t entirely done yet. Finally, we must tell Quick whether we are using multi-table inheritance or single-table inheritance so it can map the database data to the subclass entities.

Multi-Table Inheritance (MTI)

If the data for your discriminated entities is normalized across multiple tables, you should use the multi-table inheritance (MTI) method for creating discriminated entities. In the example below, The Media entity has two subclasses, MediaBook and MediaAlbum. The discriminator column for the entities is the type column in the media table and the distinct properties for each subclass come from the media_book and media_album tables.

To inform Quick that our database schema follows the MTI pattern, we must add a joinColumn and table values for each subclass.

// BookMedia (subclass entity using MTI)
component 
    extends="Media"
    table="media_book" // table for BookMedia data
    joinColumn="mediaId" // column to join on
    accessors="true"
{

Single Table Inheritance (STI)

If the data for your discriminated entities lives in a single table, you should use the single-table inheritance (STI) method for creating discriminated entities. In the example below, the Media entity has two subclasses, MediaBook and MediaAlbum. The discriminator column for the entities is the type column in the media table, and the distinct properties for each subclass come from a single table.

To inform Quick that our database schema follows the STI pattern, we must also add singleTableInheritance=true to the parent entity.

// Media (parent entity)
component 
    extends="quick.models.BaseEntity" 
    accessors="true"
    table="media" 
    discriminatorColumn="type" 
    singleTableInheritance="true" // Enable STI
{