Class yii\data\ActiveDataProvider
Inheritance | yii\data\ActiveDataProvider » yii\data\BaseDataProvider » yii\base\Component » yii\base\BaseObject |
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Implements | yii\base\Configurable, yii\data\DataProviderInterface |
Available since version | 2.0 |
Source Code | https://github.com/yiisoft/yii2/blob/master/framework/data/ActiveDataProvider.php |
ActiveDataProvider implements a data provider based on yii\db\Query and yii\db\ActiveQuery.
ActiveDataProvider provides data by performing DB queries using $query.
The following is an example of using ActiveDataProvider to provide ActiveRecord instances:
$provider = new ActiveDataProvider([
'query' => Post::find(),
'pagination' => [
'pageSize' => 20,
],
]);
// get the posts in the current page
$posts = $provider->getModels();
And the following example shows how to use ActiveDataProvider without ActiveRecord:
$query = new Query();
$provider = new ActiveDataProvider([
'query' => $query->from('post'),
'pagination' => [
'pageSize' => 20,
],
]);
// get the posts in the current page
$posts = $provider->getModels();
For more details and usage information on ActiveDataProvider, see the guide article on data providers.
Public Properties
Property | Type | Description | Defined By |
---|---|---|---|
$behaviors | yii\base\Behavior[] | List of behaviors attached to this component. This property is read-only. | yii\base\Component |
$count | integer | The number of data models in the current page. This property is read-only. | yii\data\BaseDataProvider |
$db | yii\db\Connection|array|string|null | The DB connection object or the application component ID of the DB connection. | yii\data\ActiveDataProvider |
$id | string | An ID that uniquely identifies the data provider among all data providers. | yii\data\BaseDataProvider |
$key | string|callable|null | The column that is used as the key of the data models. | yii\data\ActiveDataProvider |
$keys | array | The list of key values corresponding to $models. Each data model in $models is uniquely identified by the corresponding key value in this array. | yii\data\BaseDataProvider |
$models | array | The list of data models in the current page. | yii\data\BaseDataProvider |
$pagination | yii\data\Pagination|false | The pagination object. If this is false, it means the pagination is disabled. Note that the type of this property differs in getter and setter. See getPagination() and setPagination() for details. | yii\data\BaseDataProvider |
$query | yii\db\QueryInterface|null | The query that is used to fetch data models and $totalCount if it is not explicitly set. | yii\data\ActiveDataProvider |
$sort | yii\data\Sort|boolean | The sorting object. If this is false, it means the sorting is disabled. Note that the type of this property differs in getter and setter. See getSort() and setSort() for details. | yii\data\BaseDataProvider |
$totalCount | integer | Total number of possible data models. | yii\data\BaseDataProvider |
Public Methods
Method | Description | Defined By |
---|---|---|
__call() | Calls the named method which is not a class method. | yii\base\Component |
__clone() | yii\data\ActiveDataProvider | |
__construct() | Constructor. | yii\base\BaseObject |
__get() | Returns the value of a component property. | yii\base\Component |
__isset() | Checks if a property is set, i.e. defined and not null. | yii\base\Component |
__set() | Sets the value of a component property. | yii\base\Component |
__unset() | Sets a component property to be null. | yii\base\Component |
attachBehavior() | Attaches a behavior to this component. | yii\base\Component |
attachBehaviors() | Attaches a list of behaviors to the component. | yii\base\Component |
behaviors() | Returns a list of behaviors that this component should behave as. | yii\base\Component |
canGetProperty() | Returns a value indicating whether a property can be read. | yii\base\Component |
canSetProperty() | Returns a value indicating whether a property can be set. | yii\base\Component |
className() | Returns the fully qualified name of this class. | yii\base\BaseObject |
detachBehavior() | Detaches a behavior from the component. | yii\base\Component |
detachBehaviors() | Detaches all behaviors from the component. | yii\base\Component |
ensureBehaviors() | Makes sure that the behaviors declared in behaviors() are attached to this component. | yii\base\Component |
getBehavior() | Returns the named behavior object. | yii\base\Component |
getBehaviors() | Returns all behaviors attached to this component. | yii\base\Component |
getCount() | Returns the number of data models in the current page. | yii\data\BaseDataProvider |
getKeys() | Returns the key values associated with the data models. | yii\data\BaseDataProvider |
getModels() | Returns the data models in the current page. | yii\data\BaseDataProvider |
getPagination() | Returns the pagination object used by this data provider. | yii\data\BaseDataProvider |
getSort() | Returns the sorting object used by this data provider. | yii\data\BaseDataProvider |
getTotalCount() | Returns the total number of data models. | yii\data\BaseDataProvider |
hasEventHandlers() | Returns a value indicating whether there is any handler attached to the named event. | yii\base\Component |
hasMethod() | Returns a value indicating whether a method is defined. | yii\base\Component |
hasProperty() | Returns a value indicating whether a property is defined for this component. | yii\base\Component |
init() | Initializes the DB connection component. | yii\data\ActiveDataProvider |
off() | Detaches an existing event handler from this component. | yii\base\Component |
on() | Attaches an event handler to an event. | yii\base\Component |
prepare() | Prepares the data models and keys. | yii\data\BaseDataProvider |
refresh() | Refreshes the data provider. | yii\data\BaseDataProvider |
setKeys() | Sets the key values associated with the data models. | yii\data\BaseDataProvider |
setModels() | Sets the data models in the current page. | yii\data\BaseDataProvider |
setPagination() | Sets the pagination for this data provider. | yii\data\BaseDataProvider |
setSort() | Sets the sort definition for this data provider. | yii\data\ActiveDataProvider |
setTotalCount() | Sets the total number of data models. | yii\data\BaseDataProvider |
trigger() | Triggers an event. | yii\base\Component |
Protected Methods
Method | Description | Defined By |
---|---|---|
prepareKeys() | Prepares the keys associated with the currently available data models. | yii\data\ActiveDataProvider |
prepareModels() | Prepares the data models that will be made available in the current page. | yii\data\ActiveDataProvider |
prepareTotalCount() | Returns a value indicating the total number of data models in this data provider. | yii\data\ActiveDataProvider |
Property Details
The DB connection object or the application component ID of the DB connection. If set it overrides $query default DB connection. Starting from version 2.0.2, this can also be a configuration array for creating the object.
The column that is used as the key of the data models. This can be either a column name, or a callable that returns the key value of a given data model.
If this is not set, the following rules will be used to determine the keys of the data models:
- If $query is an yii\db\ActiveQuery instance, the primary keys of yii\db\ActiveQuery::$modelClass will be used.
- Otherwise, the keys of the $models array will be used.
See also getKeys().
The query that is used to fetch data models and $totalCount if it is not explicitly set.
Method Details
public void __clone ( ) |
Initializes the DB connection component.
This method will initialize the $db property (when set) to make sure it refers to a valid DB connection.
public void init ( ) | ||
throws | yii\base\InvalidConfigException | if $db is invalid. |
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Prepares the keys associated with the currently available data models.
protected array prepareKeys ( $models ) | ||
$models | array | The available data models |
return | array | The keys |
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Prepares the data models that will be made available in the current page.
protected array prepareModels ( ) | ||
return | array | The available data models |
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Returns a value indicating the total number of data models in this data provider.
protected integer prepareTotalCount ( ) | ||
return | integer | Total number of data models in this data provider. |
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Sets the sort definition for this data provider.
public void setSort ( $value ) | ||
$value | array|yii\data\Sort|boolean | The sort definition to be used by this data provider. This can be one of the following:
|
throws | yii\base\InvalidArgumentException |
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