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CakePHP

C CakePHP 3.3 Red Velvet API

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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();
         }
    ]
]

Ignore updating the field if it is dirty

[
    'Users' => [
        'posts_published' => [
            'ignoreDirty' => true
        ]
    ]
]
Namespace: Cake\ORM\Behavior

Property Summary

  • $_config protected
    array

    Runtime config

  • $_configInitialized protected
    bool

    Whether the config property has already been configured with defaults

  • $_defaultConfig protected
    array

    Default configuration

  • $_ignoreDirty protected
    array

    Store the fields which should be ignored

  • $_reflectionCache protected static
    array

    Reflection method cache for behaviors.

  • $_table protected
    Cake\ORM\Table

    Table instance.

Method Summary

  • __construct() public

    Constructor

  • _configDelete() protected

    Delete a single config key

  • _configRead() protected

    Read a config variable

  • _configWrite() protected

    Write a config variable

  • _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.

  • _reflectionCache() protected

    Gets the methods implemented by this behavior

  • _resolveMethodAliases() protected

    Removes aliased methods that would otherwise be duplicated by userland configuration.

  • afterDelete() public

    afterDelete callback.

  • afterSave() public

    afterSave callback.

  • beforeSave() public

    beforeSave callback.

  • config() public

    Usage

  • configShallow() public

    Merge provided config with existing config. Unlike config() which does a recursive merge for nested keys, this method does a simple merge.

  • implementedEvents() public

    Gets the Model callbacks this behavior is interested in.

  • implementedFinders() public

    implementedFinders

  • implementedMethods() public

    implementedMethods

  • initialize() public

    Constructor hook method.

  • 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): void

Delete a single config key

Parameters
string $key

Key to delete.

Returns
void
Throws
Cake\Core\Exception\Exception
if attempting to clobber existing config

_configRead() ¶ protected

_configRead(string|null $key): mixed

Read a config variable

Parameters
string|null $key

Key to read.

Returns
mixed

_configWrite() ¶ protected

_configWrite(string|array $key, mixed $value, bool|string $merge = false): void

Write a config variable

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
void
Throws
Cake\Core\Exception\Exception
if attempting to clobber existing config

_getCount() ¶ protected

_getCount(array $config, array $conditions): int

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
int

_processAssociation() ¶ protected

_processAssociation(Cake\Event\Event $event, Cake\Datasource\EntityInterface $entity, Cake\ORM\Association $assoc, array $settings): void

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

Returns
void

_processAssociations() ¶ protected

_processAssociations(Cake\Event\Event $event, Cake\Datasource\EntityInterface $entity): void

Iterate all associations and update counter caches.

Parameters
Cake\Event\Event $event

Event instance.

Cake\Datasource\EntityInterface $entity

Entity.

Returns
void

_reflectionCache() ¶ protected

_reflectionCache(): array

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
array

_resolveMethodAliases() ¶ protected

_resolveMethodAliases(string $key, array $defaults, array $config): array

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
array

afterDelete() ¶ public

afterDelete(Cake\Event\Event $event, Cake\Datasource\EntityInterface $entity): void

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.

Returns
void

afterSave() ¶ public

afterSave(Cake\Event\Event $event, Cake\Datasource\EntityInterface $entity): void

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.

Returns
void

beforeSave() ¶ public

beforeSave(Cake\Event\Event $event, Cake\Datasource\EntityInterface $entity): void

beforeSave callback.

Check if a field, which should be ignored, is dirty

Parameters
Cake\Event\Event $event

The beforeSave event that was fired

Cake\Datasource\EntityInterface $entity

The entity that is going to be saved

Returns
void

config() ¶ public

config(string|array|null $key = null, mixed|null $value = null, bool $merge = true): mixed

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
mixed
Throws
Cake\Core\Exception\Exception
When trying to set a key that is invalid.

configShallow() ¶ public

configShallow(string|array $key, mixed|null $value = null): $this

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

The value to set.

Returns
$this

implementedEvents() ¶ public

implementedEvents(): array

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
array

implementedFinders() ¶ public

implementedFinders(): array

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
array

implementedMethods() ¶ public

implementedMethods(): array

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
array

initialize() ¶ public

initialize(array $config): void

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.

Returns
void

verifyConfig() ¶ public

verifyConfig(): void

verifyConfig

Checks that implemented keys contain values pointing at callable.

Returns
void
Throws
Cake\Core\Exception\Exception
if config are invalid

Property Detail

$_config ¶ protected

Runtime config

Type
array

$_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

$_ignoreDirty ¶ protected

Store the fields which should be ignored

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

$_table ¶ protected

Table instance.

Type
Cake\ORM\Table
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