Class yii\data\SqlDataProvider
Inheritance | yii\data\SqlDataProvider » 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/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 |
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__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() | Prepares the keys associated with the currently available data models. | yii\data\SqlDataProvider |
prepareModels() | Prepares the data models that will be made available in the current page. | yii\data\SqlDataProvider |
prepareTotalCount() | Returns a value indicating the total number of data models in this data provider. | 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. |
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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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