Querying Relationships

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When querying an entity, you may want to restrict the query based on the existence or absence of a related entity.  You can do that using the following four methods:
has
Name
Type
Required
Default
Description
relationshipName
String
true
​
The relationship to check.  Can also be a dot-delimited list of nested relationships.
operator
String
false
​
An optional operator to constrain the check. See qb for a list of valid operators.
count
numeric
false
​
An optional count to constrain the check.
negate
boolean
false
false
If true, checks for the the absence of the relationship instead of its existence.
Checks for the existence of a relationship when executing the query.
By default, a has constraint will only return entities that have one or more of the related entity.
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getInstance( "User" ).has( "posts" ).get();
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An optional operator and count can be added to the call.
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getInstance( "User" ).has( "posts", ">", 2 ).get();
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Nested relationships can be checked by passing a dot-delimited string of relationships.
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getInstance( "User" ).has( "posts.comments" ).get();
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doesntHave
Name
Type
Required
Default
Description
relationshipName
String
true
​
The relationship to check.  Can also be a dot-delimited list of nested relationships.
operator
String
false
​
An optional operator to constrain the check. See qb for a list of valid operators.
count
numeric
false
​
An optional count to constrain the check.
Checks for the absence of a relationship when executing the query.
By default, a doesntHave constraint will only return entities that have zero of the related entity.
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getInstance( "User" ).doesntHave( "posts" ).get();
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An optional operator and count can be added to the call.
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getInstance( "User" ).doesntHave( "posts", "<=", 1 ).get();
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Nested relationships can be checked by passing a dot-delimited string of relationships.
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getInstance( "User" ).doesntHave( "posts.comments" ).get();
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whereHas
Name
Type
Required
Default
Description
relationshipName
String
true
​
The relationship to check.  Can also be a dot-delimited list of nested relationships.
closure
Function
true
​
A closure to constrain the relationship check.
operator
String
false
​
An optional operator to constrain the check. See qb for a list of valid operators.
count
numeric
false
​
An optional count to constrain the check.
negate
boolean
false
false
If true, checks for the the absence of the relationship instead of its existence.
When you need to have more control over the relationship constraint, you can use whereHas.  This method operates similarly to has but also accepts a callback to configure the relationship constraint.
The whereHas callback is passed a builder instance configured according to the relationship.  You may call any entity or query builder methods on it as usual.
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getInstance( "User" )
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    .whereHas( "posts", function( q ) {
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	      q.where( "body", "like", "%different%" );
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    } )
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		.get();
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When you specify a nested relationship, the builder instance is configured for the last relationship specified.
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getInstance( "User" )
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    .whereHas( "posts.comments", function( q ) {
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	      q.where( "body", "like", "%great%" );
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	  } )
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	  .get();
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An optional operator and count can be added to the call, as well.
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getInstance( "User" )
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    .whereHas( "posts.comments", function( q ) {
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	      q.where( "body", "like", "%great%" );
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	  }, ">", 2 )
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	  .get();
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whereDoesntHave
Name
Type
Required
Default
Description
relationshipName
String
true
​
The relationship to check.  Can also be a dot-delimited list of nested relationships.
closure
Function
true
​
A closure to constrain the relationship check.
operator
String
false
​
An optional operator to constrain the check. See qb for a list of valid operators.
count
numeric
false
​
An optional count to constrain the check.
The whereDoesntHave callback is passed a builder instance configured according to the relationship.  You may call any entity or query builder methods on it as usual.
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getInstance( "User" )
2
    .whereDoesntHave( "posts", function( q ) {
3
	      q.where( "body", "like", "%different%" );
4
    } )
5
		.get();
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When you specify a nested relationship, the builder instance is configured for the last relationship specified.
1
getInstance( "User" )
2
    .whereDoesntHave( "posts.comments", function( q ) {
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	      q.where( "body", "like", "%great%" );
4
	  } )
5
	  .get();
Copied!
An optional operator and count can be added to the call, as well.
1
getInstance( "User" )
2
    .whereDoesntHave( "posts.comments", function( q ) {
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	      q.where( "body", "like", "%great%" );
4
	  }, ">", 2 )
5
	  .get();
Copied!
Retrieving Relationships
Relationship Counts
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