Class yii\data\SqlDataProvider
| Inheritance | yii\data\SqlDataProvider » yii\data\BaseDataProvider » yii\base\Component » yii\base\BaseObject |
|---|---|
| Implements | yii\base\Configurable, yii\data\DataProviderInterface |
| Available since version | 2.0 |
| Source Code | https://github.com/yiisoft/yii2/blob/master/framework/data/SqlDataProvider.php |
SqlDataProvider implements a data provider based on a plain SQL statement.
SqlDataProvider provides data in terms of arrays, each representing a row of query result.
Like other data providers, SqlDataProvider also supports sorting and pagination. It does so by modifying the given $sql statement with "ORDER BY" and "LIMIT" clauses. You may configure the $sort and $pagination properties to customize sorting and pagination behaviors.
SqlDataProvider may be used in the following way:
$count = Yii::$app->db->createCommand('
SELECT COUNT(*) FROM user WHERE status=:status
', [':status' => 1])->queryScalar();
$dataProvider = new SqlDataProvider([
'sql' => 'SELECT * FROM user WHERE status=:status',
'params' => [':status' => 1],
'totalCount' => $count,
'sort' => [
'attributes' => [
'age',
'name' => [
'asc' => ['first_name' => SORT_ASC, 'last_name' => SORT_ASC],
'desc' => ['first_name' => SORT_DESC, 'last_name' => SORT_DESC],
'default' => SORT_DESC,
'label' => 'Name',
],
],
],
'pagination' => [
'pageSize' => 20,
],
]);
// get the user records in the current page
$models = $dataProvider->getModels();
Note: if you want to use the pagination feature, you must configure the $totalCount property to be the total number of rows (without pagination). And if you want to use the sorting feature, you must configure the $sort property so that the provider knows which columns can be sorted.
For more details and usage information on SqlDataProvider, 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 | yii\base\Component |
| $count | integer | The number of data models in the current page. | yii\data\BaseDataProvider |
| $db | yii\db\Connection|array|string | The DB connection object or the application component ID of the DB connection. | yii\data\SqlDataProvider |
| $id | string | An ID that uniquely identifies the data provider among all data providers. | yii\data\BaseDataProvider |
| $key | string|callable | The column that is used as the key of the data models. | yii\data\SqlDataProvider |
| $keys | array | The list of key values corresponding to $models. | 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. | yii\data\BaseDataProvider |
| $params | array | Parameters (name=>value) to be bound to the SQL statement. | yii\data\SqlDataProvider |
| $sort | yii\data\Sort|boolean | The sorting object. | yii\data\BaseDataProvider |
| $sql | string | The SQL statement to be used for fetching data rows. | yii\data\SqlDataProvider |
| $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() | This method is called after the object is created by cloning an existing one. | yii\base\Component |
| __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\SqlDataProvider |
| 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\BaseDataProvider |
| 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() | {@inheritdoc} | yii\data\SqlDataProvider |
| prepareModels() | {@inheritdoc} | yii\data\SqlDataProvider |
| prepareTotalCount() | {@inheritdoc} | yii\data\SqlDataProvider |
Property Details
The DB connection object or the application component ID of the 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 keys of the $models array will be used.
Parameters (name=>value) to be bound to the SQL statement.
The SQL statement to be used for fetching data rows.
Method Details
Initializes the DB connection component.
This method will initialize the $db property to make sure it refers to a valid DB connection.
| public void init ( ) | ||
| throws | yii\base\InvalidConfigException | if $db is invalid. |
|---|---|---|
{@inheritdoc}
| protected void prepareKeys ( $models ) | ||
| $models | ||
{@inheritdoc}
| protected void prepareModels ( ) |
{@inheritdoc}
| protected void prepareTotalCount ( ) |
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