PHP Class Cake\Controller\Component\PaginatorComponent

### Configuring pagination You configure pagination when calling paginate(). See that method for more details.
Inheritance: extends Cake\Controller\Component
Show file Open project: cakephp/cakephp

Protected Properties

Property Type Description
$_defaultConfig array When calling paginate() these settings will be merged with the configuration you provide. - maxLimit - The maximum limit users can choose to view. Defaults to 100 - limit - The initial number of items per page. Defaults to 20. - page - The starting page, defaults to 1. - whitelist - A list of parameters users are allowed to set using request parameters. Modifying this list will allow users to have more influence over pagination, be careful with what you permit.

Public Methods

Method Description
checkLimit ( array $options ) : array Check the limit parameter and ensure it's within the maxLimit bounds.
getDefaults ( string $alias, array $defaults ) : array Get the default settings for a $model. If there are no settings for a specific model, the general settings will be used.
implementedEvents ( ) : array Events supported by this component.
mergeOptions ( string $alias, array $settings ) : array Merges the various options that Pagination uses.
paginate ( Cake\Datasource\RepositoryInterface | Cake\Datasource\QueryInterface $object, array $settings = [] ) : Cake\Datasource\ResultSetInterface Handles automatic pagination of model records.
validateSort ( Cake\Datasource\RepositoryInterface $object, array $options ) : array Validate that the desired sorting can be performed on the $object. Only fields or virtualFields can be sorted on. The direction param will also be sanitized. Lastly sort + direction keys will be converted into the model friendly order key.

Protected Methods

Method Description
_extractFinder ( array $options ) : array Extracts the finder name and options out of the provided pagination options
_prefix ( Cake\Datasource\RepositoryInterface $object, array $order, boolean $whitelisted = false ) : array Prefixes the field with the table alias if possible.

Method Details

_extractFinder() protected method

Extracts the finder name and options out of the provided pagination options
protected _extractFinder ( array $options ) : array
$options array the pagination options
return array An array containing in the first position the finder name and in the second the options to be passed to it

_prefix() protected method

Prefixes the field with the table alias if possible.
protected _prefix ( Cake\Datasource\RepositoryInterface $object, array $order, boolean $whitelisted = false ) : array
$object Cake\Datasource\RepositoryInterface Repository object.
$order array Order array.
$whitelisted boolean Whether or not the field was whitelisted
return array Final order array.

checkLimit() public method

Check the limit parameter and ensure it's within the maxLimit bounds.
public checkLimit ( array $options ) : array
$options array An array of options with a limit key to be checked.
return array An array of options for pagination

getDefaults() public method

Get the default settings for a $model. If there are no settings for a specific model, the general settings will be used.
public getDefaults ( string $alias, array $defaults ) : array
$alias string Model name to get default settings for.
$defaults array The defaults to use for combining settings.
return array An array of pagination defaults for a model, or the general settings.

implementedEvents() public method

Events supported by this component.
public implementedEvents ( ) : array
return array

mergeOptions() public method

Pulls settings together from the following places: - General pagination settings - Model specific settings. - Request parameters The result of this method is the aggregate of all the option sets combined together. You can change config value whitelist to modify which options/values can be set using request parameters.
public mergeOptions ( string $alias, array $settings ) : array
$alias string Model alias being paginated, if the general settings has a key with this value that key's settings will be used for pagination instead of the general ones.
$settings array The settings to merge with the request data.
return array Array of merged options.

paginate() public method

### Configuring pagination When calling paginate() you can use the $settings parameter to pass in pagination settings. These settings are used to build the queries made and control other pagination settings. If your settings contain a key with the current table's alias. The data inside that key will be used. Otherwise the top level configuration will be used. $settings = [ 'limit' => 20, 'maxLimit' => 100 ]; $results = $paginator->paginate($table, $settings); The above settings will be used to paginate any Table. You can configure Table specific settings by keying the settings with the Table alias. $settings = [ 'Articles' => [ 'limit' => 20, 'maxLimit' => 100 ], 'Comments' => [ ... ] ]; $results = $paginator->paginate($table, $settings); This would allow you to have different pagination settings for Articles and Comments tables. ### Controlling sort fields By default CakePHP will automatically allow sorting on any column on the table object being paginated. Often times you will want to allow sorting on either associated columns or calculated fields. In these cases you will need to define a whitelist of all the columns you wish to allow sorting on. You can define the whitelist in the $settings parameter: $settings = [ 'Articles' => [ 'finder' => 'custom', 'sortWhitelist' => ['title', 'author_id', 'comment_count'], ] ]; Passing an empty array as whitelist disallows sorting altogether. ### Paginating with custom finders You can paginate with any find type defined on your table using the finder option. $settings = [ 'Articles' => [ 'finder' => 'popular' ] ]; $results = $paginator->paginate($table, $settings); Would paginate using the find('popular') method. You can also pass an already created instance of a query to this method: $query = $this->Articles->find('popular')->matching('Tags', function ($q) { return $q->where(['name' => 'CakePHP']) }); $results = $paginator->paginate($query); ### Scoping Request parameters By using request parameter scopes you can paginate multiple queries in the same controller action: $articles = $paginator->paginate($articlesQuery, ['scope' => 'articles']); $tags = $paginator->paginate($tagsQuery, ['scope' => 'tags']); Each of the above queries will use different query string parameter sets for pagination data. An example URL paginating both results would be: dashboard?articles[page]=1&tags[page]=2
public paginate ( Cake\Datasource\RepositoryInterface | Cake\Datasource\QueryInterface $object, array $settings = [] ) : Cake\Datasource\ResultSetInterface
$object Cake\Datasource\RepositoryInterface | Cake\Datasource\QueryInterface The table or query to paginate.
$settings array The settings/configuration used for pagination.
return Cake\Datasource\ResultSetInterface Query results

validateSort() public method

You can use the whitelist parameter to control which columns/fields are available for sorting. This helps prevent users from ordering large result sets on un-indexed values. If you need to sort on associated columns or synthetic properties you will need to use a whitelist. Any columns listed in the sort whitelist will be implicitly trusted. You can use this to sort on synthetic columns, or columns added in custom find operations that may not exist in the schema.
public validateSort ( Cake\Datasource\RepositoryInterface $object, array $options ) : array
$object Cake\Datasource\RepositoryInterface Repository object.
$options array The pagination options being used for this request.
return array An array of options with sort + direction removed and replaced with order if possible.

Property Details

$_defaultConfig protected property

When calling paginate() these settings will be merged with the configuration you provide. - maxLimit - The maximum limit users can choose to view. Defaults to 100 - limit - The initial number of items per page. Defaults to 20. - page - The starting page, defaults to 1. - whitelist - A list of parameters users are allowed to set using request parameters. Modifying this list will allow users to have more influence over pagination, be careful with what you permit.
protected array $_defaultConfig
return array