Class yii\redis\ActiveQuery

All Classes | Methods | Events

Inheritance	yii\redis\ActiveQuery » yii\base\Component
Implements	yii\db\ActiveQueryInterface
Uses Traits	yii\db\ActiveQueryTrait, yii\db\ActiveRelationTrait, yii\db\QueryTrait
Available since version	2.0

ActiveQuery represents a query associated with an Active Record class.

Normal Query
Relational query

An ActiveQuery can be a normal query or be used in a relational context.

ActiveQuery instances are usually created by yii\redis\ActiveRecord::find(). Relational queries are created by yii\redis\ActiveRecord::hasOne() and yii\redis\ActiveRecord::hasMany().

Normal Query

ActiveQuery mainly provides the following methods to retrieve the query results:

one(): returns a single record populated with the first row of data.
all(): returns all records based on the query results.
count(): returns the number of records.
sum(): returns the sum over the specified column.
average(): returns the average over the specified column.
min(): returns the min over the specified column.
max(): returns the max over the specified column.
scalar(): returns the value of the first column in the first row of the query result.
exists(): returns a value indicating whether the query result has data or not.

You can use query methods, such as \yii\redis\where(), \yii\redis\limit() and \yii\redis\orderBy() to customize the query options.

ActiveQuery also provides the following additional query options:

\yii\redis\with(): list of relations that this query should be performed with.
\yii\redis\indexBy(): the name of the column by which the query result should be indexed.
\yii\redis\asArray(): whether to return each record as an array.

These options can be configured using methods of the same name. For example:

$customers = Customer::find()->with('orders')->asArray()->all();

Relational query

In relational context ActiveQuery represents a relation between two Active Record classes.

Relational ActiveQuery instances are usually created by calling yii\redis\ActiveRecord::hasOne() and yii\redis\ActiveRecord::hasMany(). An Active Record class declares a relation by defining a getter method which calls one of the above methods and returns the created ActiveQuery object.

A relation is specified by \yii\redis\link which represents the association between columns of different tables; and the multiplicity of the relation is indicated by \yii\redis\multiple.

If a relation involves a junction table, it may be specified by \yii\redis\via(). This methods may only be called in a relational context. Same is true for \yii\redis\inverseOf(), which marks a relation as inverse of another relation.

Public Methods

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Method	Description	Defined By
__construct()	Constructor.	yii\redis\ActiveQuery
all()	Executes the query and returns all results as an array.	yii\redis\ActiveQuery
average()	Returns the average of the specified column values.	yii\redis\ActiveQuery
column()	Executes the query and returns the first column of the result.	yii\redis\ActiveQuery
count()	Returns the number of records.	yii\redis\ActiveQuery
exists()	Returns a value indicating whether the query result contains any row of data.	yii\redis\ActiveQuery
init()	Initializes the object.	yii\redis\ActiveQuery
max()	Returns the maximum of the specified column values.	yii\redis\ActiveQuery
min()	Returns the minimum of the specified column values.	yii\redis\ActiveQuery
one()	Executes the query and returns a single row of result.	yii\redis\ActiveQuery
scalar()	Returns the query result as a scalar value.	yii\redis\ActiveQuery
sum()	Returns the number of records.	yii\redis\ActiveQuery

Protected Methods

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Method	Description	Defined By
executeScript()	Executes a script created by yii\redis\LuaScriptBuilder	yii\redis\ActiveQuery

Events

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Event	Type	Description	Defined By
EVENT_INIT	\yii\redis\Event	An event that is triggered when the query is initialized via init().	yii\redis\ActiveQuery

Method Details

__construct() public method

Constructor.

public void __construct ( $modelClass, $config = [] )
$modelClass	string	The model class associated with this query
$config	array	Configurations to be applied to the newly created query object

all() public method

Executes the query and returns all results as an array.

public array\|yii\redis\ActiveRecord[] all ( $db = null )
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	array\|yii\redis\ActiveRecord[]	The query results. If the query results in nothing, an empty array will be returned.

average() public method

Returns the average of the specified column values.

public integer average ( $column, $db = null )
$column	string	The column name or expression. Make sure you properly quote column names in the expression.
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	integer	The average of the specified column values.

column() public method

Executes the query and returns the first column of the result.

public array column ( $column, $db = null )
$column	string	Name of the column to select
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	array	The first column of the query result. An empty array is returned if the query results in nothing.

count() public method

Returns the number of records.

public integer count ( $q = '*', $db = null )
$q	string	The COUNT expression. This parameter is ignored by this implementation.
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	integer	Number of records

executeScript() protected method

Executes a script created by yii\redis\LuaScriptBuilder

protected array\|boolean\|null\|string executeScript ( $db, $type, $columnName = null )
$db	yii\redis\Connection\|null	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
$type	string	The type of the script to generate
$columnName	string
throws	\yii\base\NotSupportedException

exists() public method

Returns a value indicating whether the query result contains any row of data.

public boolean exists ( $db = null )
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	boolean	Whether the query result contains any row of data.

init() public method

Initializes the object.

This method is called at the end of the constructor. The default implementation will trigger an EVENT_INIT event. If you override this method, make sure you call the parent implementation at the end to ensure triggering of the event.

public void init ( )

max() public method

Returns the maximum of the specified column values.

public integer max ( $column, $db = null )
$column	string	The column name or expression. Make sure you properly quote column names in the expression.
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	integer	The maximum of the specified column values.

min() public method

Returns the minimum of the specified column values.

public integer min ( $column, $db = null )
$column	string	The column name or expression. Make sure you properly quote column names in the expression.
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	integer	The minimum of the specified column values.

one() public method

Executes the query and returns a single row of result.

public yii\redis\ActiveRecord\|array\|null one ( $db = null )
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	yii\redis\ActiveRecord\|array\|null	A single row of query result. Depending on the setting of \yii\redis\asArray, the query result may be either an array or an ActiveRecord object. Null will be returned if the query results in nothing.

scalar() public method

Returns the query result as a scalar value.

The value returned will be the specified attribute in the first record of the query results.

public string scalar ( $attribute, $db = null )
$attribute	string	Name of the attribute to select
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	string	The value of the specified attribute in the first record of the query result. Null is returned if the query result is empty.

sum() public method

Returns the number of records.

public integer sum ( $column, $db = null )
$column	string	The column to sum up
$db	yii\redis\Connection	The database connection used to execute the query. If this parameter is not given, the `db` application component will be used.
return	integer	Number of records

Event Details

EVENT_INIT event of type \yii\redis\Event

An event that is triggered when the query is initialized via init().