# Updating Existing Entities

## save

Updates are handled identically to inserts when using the `save` method. The only difference is that instead of starting with a new entity, we start with an existing entity.

```javascript
var user = getInstance( "User" ).find( 1 );
user.setPassword( "newpassword" );
user.save();
```

## update

You can update multiple fields at once using the `update` method. This is similar to the `create` method for creating new entities.

```javascript
var user = getInstance( "User" ).find( 1 );
user.update( {
   email = "janedoe2@example.com",
   password = "newpassword"
} );
```

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

By default, if you have a key in the struct that doesn't match a property in the entity the `update` method will fail.  If you add the optional argument `ignoreNonExistentAttributes` set to `true`, those missing keys are ignored. Now you can pass the `rc` scope from your submitted form directly into the `update` method and not worry about any other keys in the `rc` like `event` that would cause the method to fail.

```javascript
var user = getInstance( "User" ).find( 1 );
user.update( rc, true );
```

## updateAll

Updates can be performed against any number of entities that match a given query.

```javascript
getInstance( "User" )
    .where( "lastLoggedIn", ">", dateAdd( "m", 3, now() ) )
    .updateAll( {
        "active" = 0
    } );
```


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