Class PaginatorComponent

_extractFinder()source protected

_extractFinder( array $options )

Extracts the finder name and options out of the provided pagination options

Parameters

array $options

the pagination options

Returns

array

An array containing in the first position the finder name and in the second the options to be passed to it

_prefix()source protected

_prefix( Cake\Datasource\RepositoryInterface $object , array $order , boolean $whitelisted false )

Prefixes the field with the table alias if possible.

Parameters

Cake\Datasource\RepositoryInterface $object

Repository object.

array $order

Order array.

boolean $whitelisted optional false

Whether or not the field was whitelisted

Returns

array
Final order array.

checkLimit()source public

checkLimit( array $options )

Check the limit parameter and ensure it's within the maxLimit bounds.

Parameters

array $options

An array of options with a limit key to be checked.

Returns

array
An array of options for pagination

getDefaults()source public

getDefaults( string $alias , array $settings )

Get the settings for a $model. If there are no settings for a specific model, the general settings will be used.

Parameters

string $alias

Model name to get settings for.

array $settings

The settings which is used for combining.

Returns

array
An array of pagination settings for a model, or the general settings.

implementedEvents()source public

implementedEvents( )

Events supported by this component.

Returns

array

Overrides

Cake\Controller\Component::implementedEvents()

mergeOptions()source public

mergeOptions( string $alias , array $settings )

Merges the various options that Pagination uses. 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.

Parameters

string $alias

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.

array $settings

The settings to merge with the request data.

Returns

array
Array of merged options.

paginate()source public

paginate( Cake\Datasource\RepositoryInterface|Cake\Datasource\QueryInterface $object , array $settings [] )

Handles automatic pagination of model records.

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

Parameters

Cake\Datasource\RepositoryInterface|Cake\Datasource\QueryInterface $object

The table or query to paginate.

array $settings optional []

The settings/configuration used for pagination.

Returns

Cake\Datasource\ResultSetInterface
Query results

Throws

Cake\Network\Exception\NotFoundException

validateSort()source public

validateSort( Cake\Datasource\RepositoryInterface $object , array $options )

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.

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.

Parameters

Cake\Datasource\RepositoryInterface $object

Repository object.

array $options

The pagination options being used for this request.

Returns

array
An array of options with sort + direction removed and replaced with order if possible.

__construct()source public

__construct( Cake\Controller\ComponentRegistry $registry , array $config [] )

Constructor

Parameters

Cake\Controller\ComponentRegistry $registry

A ComponentRegistry this component can use to lazy load its components

array $config optional []

Array of configuration settings.

__debugInfo()source public

__debugInfo( )

Returns an array that can be used to describe the internal state of this object.

Returns

array

__get()source public

__get( string $name )

Magic method for lazy loading $components.

Parameters

string $name

Name of component to get.

Returns

mixed
A Component object or null.

initialize()source 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 component.

_configDelete()source protected

_configDelete( string $key )

Delete a single config key

Parameters

string $key

Key to delete.

Throws

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

_configRead()source protected

_configRead( string|null $key )

Read a config variable

Parameters

string|null $key

Key to read.

Returns

mixed

_configWrite()source 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

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

config()source 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

mixed
Config value being read, or the object itself on write operations.

Throws

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

configShallow()source 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.

log()source public

log( mixed $msg , integer|string $level LogLevel::ERROR , string|array $context [] )

Convenience method to write a message to Log. See Log::write() for more information on writing to logs.

Parameters

mixed $msg

Log message.

integer|string $level optional LogLevel::ERROR

Error level.

string|array $context optional []

Additional log data relevant to this message.

Returns

boolean
Success of log write.

[
    'page' => 1,
    'limit' => 20,
    'maxLimit' => 100,
    'whitelist' => ['limit', 'sort', 'page', 'direction']
]