Class Behavior
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.
Mixin methods
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);.
Callback methods
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.
Finder methods
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)Property Summary
-
$_config protected
arrayRuntime config
-
$_configInitialized protected
boolWhether the config property has already been configured with defaults
-
$_defaultConfig protected
arrayDefault configuration
-
$_reflectionCache protected static
arrayReflection method cache for behaviors.
-
$_table protected
Cake\ORM\TableTable instance.
Method Summary
-
__construct() public
Constructor
-
_configDelete() protected
Deletes a single config key.
-
_configRead() protected
Reads a config key.
-
_configWrite() protected
Writes a config key.
-
_reflectionCache() protected
Gets the methods implemented by this behavior
-
_resolveMethodAliases() protected
Removes aliased methods that would otherwise be duplicated by userland configuration.
-
config() public deprecated
Gets/Sets the config.
-
configShallow() public
Merge provided config with existing config. Unlike
config()which does a recursive merge for nested keys, this method does a simple merge. -
getConfig() public
Returns the config.
-
getTable() public
Get the table instance this behavior is bound to.
-
implementedEvents() public
Gets the Model callbacks this behavior is interested in.
-
implementedFinders() public
implementedFinders
-
implementedMethods() public
implementedMethods
-
initialize() public
Constructor hook method.
-
setConfig() public
Sets the config.
-
verifyConfig() public
verifyConfig
Method Detail
__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.
_configDelete() ¶ protected
_configDelete(string $key): voidDeletes a single config key.
Parameters
-
string$key Key to delete.
Returns
voidThrows
Cake\Core\Exception\Exceptionif attempting to clobber existing config
_configRead() ¶ protected
_configRead(string|null $key): mixedReads a config key.
Parameters
-
string|null$key Key to read.
Returns
mixed_configWrite() ¶ protected
_configWrite(string|array $key, mixed $value, bool|string $merge = false): voidWrites a config key.
Parameters
-
string|array$key Key to write to.
-
mixed$value Value to write.
-
bool|string$merge optional True to merge recursively, 'shallow' for simple merge, false to overwrite, defaults to false.
Returns
voidThrows
Cake\Core\Exception\Exceptionif attempting to clobber existing config
_reflectionCache() ¶ protected
_reflectionCache(): arrayGets 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
array_resolveMethodAliases() ¶ protected
_resolveMethodAliases(string $key, array $defaults, array $config): arrayRemoves aliased methods that would otherwise be duplicated by userland configuration.
Parameters
-
string$key The key to filter.
-
array$defaults The default method mappings.
-
array$config The customized method mappings.
Returns
arrayconfig() ¶ public
config(string|array|null $key = null, mixed|null $value = null, bool $merge = true): mixedGets/Sets the config.
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 The key to get/set, or a complete array of configs.
-
mixed|null$value optional The value to set.
-
bool$merge optional Whether to recursively merge or overwrite existing config, defaults to true.
Returns
mixedThrows
Cake\Core\Exception\ExceptionWhen trying to set a key that is invalid.
configShallow() ¶ public
configShallow(string|array $key, mixed|null $value = null): $thisMerge 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->configShallow('key', $value);Setting a nested value:
$this->configShallow('some.nested.key', $value);Updating multiple config settings at the same time:
$this->configShallow(['one' => 'value', 'another' => 'value']);Parameters
-
string|array$key The key to set, or a complete array of configs.
-
mixed|null$value optional The value to set.
Returns
$thisgetConfig() ¶ public
getConfig(string|null $key = null, mixed $default = null): mixedReturns the config.
Usage
Reading the whole config:
$this->getConfig();Reading a specific value:
$this->getConfig('key');Reading a nested value:
$this->getConfig('some.nested.key');Reading with default value:
$this->getConfig('some-key', 'default-value');Parameters
-
string|null$key optional The key to get or null for the whole config.
-
mixed$default optional The return value when the key does not exist.
Returns
mixedgetTable() ¶ public
getTable(): Cake\ORM\TableGet the table instance this behavior is bound to.
Returns
Cake\ORM\TableimplementedEvents() ¶ public
implementedEvents(): arrayGets 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
arrayimplementedFinders() ¶ public
implementedFinders(): arrayimplementedFinders
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
arrayimplementedMethods() ¶ public
implementedMethods(): arrayimplementedMethods
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
arrayinitialize() ¶ public
initialize(array $config): voidConstructor hook method.
Implement this method to avoid having to overwrite the constructor and call parent.
Parameters
-
array$config The configuration settings provided to this behavior.
Returns
voidsetConfig() ¶ public
setConfig(string|array $key, mixed|null $value = null, bool $merge = true): $thisSets the config.
Usage
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:
$this->setConfig(['one' => 'value', 'another' => 'value']);Parameters
-
string|array$key The key to set, or a complete array of configs.
-
mixed|null$value optional The value to set.
-
bool$merge optional Whether to recursively merge or overwrite existing config, defaults to true.
Returns
$thisThrows
Cake\Core\Exception\ExceptionWhen trying to set a key that is invalid.
verifyConfig() ¶ public
verifyConfig(): voidverifyConfig
Checks that implemented keys contain values pointing at callable.
Returns
voidThrows
Cake\Core\Exception\Exceptionif config are invalid
Property Detail
$_configInitialized ¶ protected
Whether the config property has already been configured with defaults
Type
bool$_defaultConfig ¶ protected
Default configuration
These are merged with user-provided configuration when the behavior is used.
Type
array$_reflectionCache ¶ protected static
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.
Type
array