Class CounterCacheBehavior
CounterCache behavior
Enables models to cache the amount of connections in a given relation.
Examples with Post model belonging to User model
Regular counter cache
[
'Users' => [
'post_count'
]
]
Counter cache with scope
[
'Users' => [
'posts_published' => [
'conditions' => [
'published' => true
]
]
]
]
Counter cache using custom find
[
'Users' => [
'posts_published' => [
'finder' => 'published' // Will be using findPublished()
]
]
]
Counter cache using lambda function returning the count This is equivalent to example #2
[
'Users' => [
'posts_published' => function (Event $event, EntityInterface $entity, Table $table) {
$query = $table->find('all')->where([
'published' => true,
'user_id' => $entity->get('user_id')
]);
return $query->count();
}
]
]
- Cake\ORM\Behavior implements Cake\Event\EventListenerInterface uses Cake\Core\InstanceConfigTrait
-
Cake\ORM\Behavior\CounterCacheBehavior
Inherited Properties
Method Summary
-
_getCount() protected
Fetches and returns the count for a single field in an association -
_processAssociation() protected
Updates counter cache for a single association -
_processAssociations() protected
Iterate all associations and update counter caches. -
afterDelete() public
afterDelete callback. -
afterSave() public
afterSave callback.
Method Detail
_getCount() protected ¶
_getCount( array $config , array $conditions )
Fetches and returns the count for a single field in an association
Parameters
- array $config
- The counter cache configuration for a single field
- array $conditions
- Additional conditions given to the query
Returns
The number of relations matching the given config and conditions
_processAssociation() protected ¶
_processAssociation( Cake\Event\Event $event , Cake\Datasource\EntityInterface $entity , Cake\ORM\Association $assoc , array $settings )
Updates counter cache for a single association
Parameters
-
Cake\Event\Event$event - Event instance.
-
Cake\Datasource\EntityInterface$entity - Entity
-
Cake\ORM\Association$assoc - The association object
- array $settings
- The settings for for counter cache for this association
_processAssociations() protected ¶
_processAssociations( Cake\Event\Event $event , Cake\Datasource\EntityInterface $entity )
Iterate all associations and update counter caches.
Parameters
-
Cake\Event\Event$event - Event instance.
-
Cake\Datasource\EntityInterface$entity - Entity.
afterDelete() public ¶
afterDelete( Cake\Event\Event $event , Cake\Datasource\EntityInterface $entity )
afterDelete callback.
Makes sure to update counter cache when a record is deleted.
Parameters
-
Cake\Event\Event$event - The afterDelete event that was fired.
-
Cake\Datasource\EntityInterface$entity - The entity that was deleted.
afterSave() public ¶
afterSave( Cake\Event\Event $event , Cake\Datasource\EntityInterface $entity )
afterSave callback.
Makes sure to update counter cache when a new record is created or updated.
Parameters
-
Cake\Event\Event$event - The afterSave event that was fired.
-
Cake\Datasource\EntityInterface$entity - The entity that was saved.
Methods inherited from Cake\ORM\Behavior
__construct() public ¶
__construct( Cake\ORM\Table $table , array $config = [] )
Constructor
Merges config with the default and store in the config property
Parameters
-
Cake\ORM\Table$table - The table this behavior is attached to.
- array $config optional []
- The config for this behavior.
_reflectionCache() protected ¶
_reflectionCache( )
Gets the methods implemented by this behavior
Uses the implementedEvents() method to exclude callback methods.
Methods starting with _ will be ignored, as will methods
declared on Cake\ORM\Behavior
Returns
_resolveMethodAliases() protected ¶
_resolveMethodAliases( string $key , array $defaults , array $config )
Removes aliased methods that would otherwise be duplicated by userland configuration.
Parameters
- string $key
- The key to filter.
- array $defaults
- The default method mappings.
- array $config
- The customized method mappings.
Returns
A de-duped list of config data.
implementedEvents() public ¶
implementedEvents( )
Gets the Model callbacks this behavior is interested in.
By defining one of the callback methods a behavior is assumed to be interested in the related event.
Override this method if you need to add non-conventional event listeners. Or if you want your behavior to listen to non-standard events.
Returns
Implementation of
implementedFinders() public ¶
implementedFinders( )
implementedFinders
Provides an alias->methodname map of which finders a behavior implements. Example:
[ 'this' => 'findThis', 'alias' => 'findMethodName' ]
With the above example, a call to $Table->find('this') will call $Behavior->findThis()
and a call to $Table->find('alias') will call $Behavior->findMethodName()
It is recommended, though not required, to define implementedFinders in the config property of child classes such that it is not necessary to use reflections to derive the available method list. See core behaviors for examples
Returns
implementedMethods() public ¶
implementedMethods( )
implementedMethods
Provides an alias->methodname map of which methods a behavior implements. Example:
[ 'method' => 'method', 'aliasedmethod' => 'somethingElse' ]
With the above example, a call to $Table->method() will call $Behavior->method()
and a call to $Table->aliasedmethod() will call $Behavior->somethingElse()
It is recommended, though not required, to define implementedFinders in the config property of child classes such that it is not necessary to use reflections to derive the available method list. See core behaviors for examples
Returns
initialize() public ¶
initialize( array $config )
Constructor hook method.
Implement this method to avoid having to overwrite the constructor and call parent.
Parameters
- array $config
- The configuration settings provided to this behavior.
verifyConfig() public ¶
verifyConfig( )
verifyConfig
Checks that implemented keys contain values pointing at callable.
Throws
Methods used from Cake\Core\InstanceConfigTrait
_configDelete() protected ¶
_configDelete( string $key )
Delete a single config key
Parameters
- string $key
- Key to delete.
Throws
_configRead() protected ¶
_configRead( string|null $key )
Read a config variable
Parameters
- string|null $key
- Key to read.
Returns
_configWrite() protected ¶
_configWrite( string|array $key , mixed $value , boolean|string $merge = false )
Write a config variable
Parameters
- string|array $key
- Key to write to.
- mixed $value
- Value to write.
- boolean|string $merge optional false
True to merge recursively, 'shallow' for simple merge, false to overwrite, defaults to false.
Throws
config() public ¶
config( string|array|null $key = null , mixed|null $value = null , boolean $merge = true )
Usage
Reading the whole config:
$this->config();
Reading a specific value:
$this->config('key');
Reading a nested value:
$this->config('some.nested.key');
Setting a specific value:
$this->config('key', $value);
Setting a nested value:
$this->config('some.nested.key', $value);
Updating multiple config settings at the same time:
$this->config(['one' => 'value', 'another' => 'value']);
Parameters
- string|array|null $key optional null
- The key to get/set, or a complete array of configs.
- mixed|null $value optional null
- The value to set.
- boolean $merge optional true
- Whether to recursively merge or overwrite existing config, defaults to true.
Returns
Config value being read, or the object itself on write operations.
Throws
configShallow() public ¶
configShallow( string|array $key , mixed|null $value = null )
Merge provided config with existing config. Unlike config() which does
a recursive merge for nested keys, this method does a simple merge.
Setting a specific value:
$this->config('key', $value);
Setting a nested value:
$this->config('some.nested.key', $value);
Updating multiple config settings at the same time:
$this->config(['one' => 'value', 'another' => 'value']);
Parameters
- string|array $key
- The key to set, or a complete array of configs.
- mixed|null $value optional null
- The value to set.
Returns
$this The object itself.