Base class for behaviors.
Behaviors allow you to simulate mixins, and create reusable blocks of application logic, that can be reused across several models. Behaviors also provide a way to hook into model callbacks and augment their behavior.
Behaviors can provide mixin like features by declaring public methods. These methods will be accessible on the tables the behavior has been added to.
function doSomething($arg1, $arg2) {
// do something
} Would be called like $table->doSomething($arg1, $arg2);.
Behaviors can listen to any events fired on a Table. By default CakePHP provides a number of lifecycle events your behaviors can listen to:
beforeFind(Event $event, Query $query, ArrayObject $options, boolean $primary) Fired before each find operation. By stopping the event and supplying a return value you can bypass the find operation entirely. Any changes done to the $query instance will be retained for the rest of the find. The $primary parameter indicates whether or not this is the root query, or an associated query.
buildValidator(Event $event, Validator $validator, string $name) Fired when the validator object identified by $name is being built. You can use this callback to add validation rules or add validation providers.
buildRules(Event $event, RulesChecker $rules) Fired when the rules checking object for the table is being built. You can use this callback to add more rules to the set.
beforeRules(Event $event, EntityInterface $entity, ArrayObject $options, $operation) Fired before an entity is validated using by a rules checker. By stopping this event, you can return the final value of the rules checking operation.
afterRules(Event $event, EntityInterface $entity, ArrayObject $options, bool $result, $operation) Fired after the rules have been checked on the entity. By stopping this event, you can return the final value of the rules checking operation.
beforeSave(Event $event, EntityInterface $entity, ArrayObject $options) Fired before each entity is saved. Stopping this event will abort the save operation. When the event is stopped the result of the event will be returned.
afterSave(Event $event, EntityInterface $entity, ArrayObject $options) Fired after an entity is saved.
beforeDelete(Event $event, EntityInterface $entity, ArrayObject $options) Fired before an entity is deleted. By stopping this event you will abort the delete operation.
afterDelete(Event $event, EntityInterface $entity, ArrayObject $options) Fired after an entity has been deleted.
In addition to the core events, behaviors can respond to any event fired from your Table classes including custom application specific ones.
You can set the priority of a behaviors callbacks by using the priority setting when attaching a behavior. This will set the priority for all the callbacks a behavior provides.
Behaviors can provide finder methods that hook into a Table's find() method. Custom finders are a great way to provide preset queries that relate to your behavior. For example a SluggableBehavior could provide a find('slugged') finder. Behavior finders are implemented the same as other finders. Any method starting with find will be setup as a finder. Your finder methods should expect the following arguments:
findSlugged(Query $query, array $options)
Cake\Event\EventManager$_defaultConfig protected arrayarray$_table protected __construct( Cake\ORM\Table $table , array $config [] )
Constructor
Merges config with the default and store in the config property
Cake\ORM\Table $table $config optional [] _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
_resolveMethodAliases( string $key , array $defaults , array $config )
Removes aliased methods that would otherwise be duplicated by userland configuration.
$key $defaults $config getTable( )
Get the table instance this behavior is bound to.
Cake\ORM\TableimplementedEvents( )
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.
Cake\Event\EventListenerInterface::implementedEvents() 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
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
initialize( array $config )
Constructor hook method.
Implement this method to avoid having to overwrite the constructor and call parent.
$config verifyConfig( )
verifyConfig
Checks that implemented keys contain values pointing at callable.
Cake\Core\Exception\Exception_configDelete( string $key )
Deletes a single config key.
$key Cake\Core\Exception\Exception_configRead( string|null $key )
Reads a config key.
$key _configWrite( string|array $key , mixed $value , boolean|string $merge false )
Writes a config key.
$key $value $merge optional false True to merge recursively, 'shallow' for simple merge, false to overwrite, defaults to false.
Cake\Core\Exception\Exceptionconfig( string|array|null $key null , mixed|null $value null , boolean $merge true )
Gets/Sets the config.
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']);
$key optional null $value optional null $merge optional true Cake\Core\Exception\ExceptionconfigShallow( 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']);
$key $value optional null getConfig( string|null $key null )
Returns the config.
Reading the whole config:
$this->getConfig();
Reading a specific value:
$this->getConfig('key'); Reading a nested value:
$this->getConfig('some.nested.key'); $key optional null setConfig( string|array $key , mixed|null $value null , boolean $merge true )
Sets the config.
Setting a specific value:
$this->setConfig('key', $value); Setting a nested value:
$this->setConfig('some.nested.key', $value); Updating multiple config settings at the same time:
$this->setConfig(['one' => 'value', 'another' => 'value']);
$key $value optional null $merge optional true Cake\Core\Exception\Exceptionprotected array
Default configuration
These are merged with user-provided configuration when the behavior is used.
[]
protected static array
Reflection method cache for behaviors.
Stores the reflected method + finder methods per class. This prevents reflecting the same class multiple times in a single process.
[]
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https://api.cakephp.org/3.4/class-Cake.ORM.Behavior.html