# Class yii\mongodb\ActiveQuery

Inheritance | yii\mongodb\ActiveQuery » yii\mongodb\Query » yii\base\Component » yii\base\BaseObject
Implements | yii\base\Configurable, yii\db\ActiveQueryInterface, yii\db\QueryInterface
Uses Traits | yii\db\ActiveQueryTrait, yii\db\ActiveRelationTrait, yii\db\QueryTrait
Available since version | 2.0
Source Code | https://github.com/yiisoft/yii2-mongodb/blob/master/ActiveQuery.php

ActiveQuery represents a Mongo query associated with an Active Record class.

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

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

## Normal Query ¶

ActiveQuery instances are usually created by yii\mongodb\ActiveRecord::find().

Because ActiveQuery extends from yii\mongodb\Query, one can use query methods, such as where(), orderBy() to customize the query options.

ActiveQuery also provides the following additional query options:

- with(): list of relations that this query should be performed with.
- 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\mongodb\ActiveRecord::hasOne() and yii\mongodb\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 $link which represents the association between columns of different collections; and the multiplicity of the relation is indicated by $multiple.

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

## Public Properties

Hide inherited properties

Property | Type | Description | Defined By
--- | --- | --- | ---
$asArray | boolean | Whether to return each record as an array. | yii\db\ActiveQueryTrait
$behaviors | yii\base\Behavior[] | List of behaviors attached to this component. This property is read-only. | yii\base\Component
$collection | yii\mongodb\Collection | Collection instance. This property is read-only. | yii\mongodb\ActiveQuery
$emulateExecution | boolean | Whether to emulate the actual query execution, returning empty or false results. | yii\db\QueryTrait
$from | string|array | The collection to be selected from. | yii\mongodb\Query
$indexBy | string|callable | The name of the column by which the query results should be indexed by. | yii\db\QueryTrait
$inverseOf | string | The name of the relation that is the inverse of this relation. | yii\db\ActiveRelationTrait
$limit | integer|yii\db\ExpressionInterface | Maximum number of records to be returned. | yii\db\QueryTrait
$link | array | The columns of the primary and foreign tables that establish a relation. | yii\db\ActiveRelationTrait
$modelClass | string | The name of the ActiveRecord class. | yii\db\ActiveQueryTrait
$multiple | boolean | Whether this query represents a relation to more than one record. | yii\db\ActiveRelationTrait
$offset | integer|yii\db\ExpressionInterface | Zero-based offset from where the records are to be returned. | yii\db\QueryTrait
$options | array | Cursor options in format: optionKey => optionValue | yii\mongodb\Query
$orderBy | array | How to sort the query results. | yii\db\QueryTrait
$primaryModel | yii\db\ActiveRecord | The primary model of a relational query. | yii\db\ActiveRelationTrait
$select | array | The fields of the results to return. | yii\mongodb\Query
$via | array|object | The query associated with the junction table. | yii\db\ActiveRelationTrait
$where | string|array|yii\db\ExpressionInterface | Query condition. | yii\db\QueryTrait
$with | array | A list of relations that this query should be performed with | yii\db\ActiveQueryTrait

## Public Methods

Hide inherited methods

Method | Description | Defined By
--- | --- | ---
() | ActiveRecordInterface[] all($db = null) | yii\db\ActiveRelationTrait
__call() | Calls the named method which is not a class method. | yii\base\Component
__clone() | Clones internal objects. | yii\db\ActiveRelationTrait
__construct() | Constructor. | yii\mongodb\ActiveQuery
__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
addOptions() | Adds additional cursor options. | yii\mongodb\Query
addOrderBy() | Adds additional ORDER BY columns to the query. | yii\db\QueryTrait
all() | Executes query and returns all results as an array. | yii\mongodb\ActiveQuery
andFilterCompare() | Helper method for easy querying on values containing some common operators. | yii\mongodb\Query
andFilterWhere() | Adds an additional WHERE condition to the existing one but ignores empty operands. | yii\db\QueryTrait
andWhere() | Adds an additional WHERE condition to the existing one. | yii\db\QueryTrait
asArray() | Sets the asArray() property. | yii\db\ActiveQueryTrait
attachBehavior() | Attaches a behavior to this component. | yii\base\Component
attachBehaviors() | Attaches a list of behaviors to the component. | yii\base\Component
average() | Returns the average of the specified column values. | yii\mongodb\Query
batch() | Starts a batch query. | yii\mongodb\Query
behaviors() | Returns a list of behaviors that this component should behave as. | yii\base\Component
buildCursor() | Builds the MongoDB cursor for this query. | yii\mongodb\Query
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
column() | Executes the query and returns the first column of the result. | yii\mongodb\Query
count() | Returns the number of records. | yii\mongodb\Query
detachBehavior() | Detaches a behavior from the component. | yii\base\Component
detachBehaviors() | Detaches all behaviors from the component. | yii\base\Component
distinct() | Returns a list of distinct values for the given column across a collection. | yii\mongodb\Query
each() | Starts a batch query and retrieves data row by row. | yii\mongodb\Query
emulateExecution() | Sets whether to emulate query execution, preventing any interaction with data storage. | yii\db\QueryTrait
ensureBehaviors() | Makes sure that the behaviors declared in behaviors() are attached to this component. | yii\base\Component
exists() | Returns a value indicating whether the query result contains any row of data. | yii\mongodb\Query
filterWhere() | Sets the WHERE part of the query but ignores empty operands. | yii\db\QueryTrait
findFor() | Finds the related records for the specified primary record. | yii\db\ActiveRelationTrait
findWith() | Finds records corresponding to one or multiple relations and populates them into the primary models. | yii\db\ActiveQueryTrait
from() | Sets the collection to be selected from. | yii\mongodb\Query
getBehavior() | Returns the named behavior object. | yii\base\Component
getBehaviors() | Returns all behaviors attached to this component. | yii\base\Component
getCollection() | Returns the Mongo collection for this query. | yii\mongodb\ActiveQuery
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
indexBy() | Sets the indexBy() property. | yii\db\QueryTrait
init() | Initializes the object. | yii\mongodb\ActiveQuery
inverseOf() | Sets the name of the relation that is the inverse of this relation. | yii\db\ActiveRelationTrait
limit() | Sets the LIMIT part of the query. | yii\db\QueryTrait
max() | Returns the maximum of the specified column values. | yii\mongodb\Query
min() | Returns the minimum of the specified column values. | yii\mongodb\Query
modify() | Performs 'findAndModify' query and returns a single row of result. | yii\mongodb\ActiveQuery
off() | Detaches an existing event handler from this component. | yii\base\Component
offset() | Sets the OFFSET part of the query. | yii\db\QueryTrait
on() | Attaches an event handler to an event. | yii\base\Component
one() | Executes query and returns a single row of result. | yii\mongodb\ActiveQuery
options() | Sets the cursor options. | yii\mongodb\Query
orFilterWhere() | Adds an additional WHERE condition to the existing one but ignores empty operands. | yii\db\QueryTrait
orWhere() | Adds an additional WHERE condition to the existing one. | yii\db\QueryTrait
orderBy() | Sets the ORDER BY part of the query. | yii\db\QueryTrait
populate() | Converts the raw query results into the format as specified by this query. | yii\mongodb\ActiveQuery
populateRelation() | Finds the related records and populates them into the primary models. | yii\db\ActiveRelationTrait
prepare() | Prepares for query building. | yii\mongodb\ActiveQuery
scalar() | Returns the query result as a scalar value. | yii\mongodb\Query
select() | Sets the list of fields of the results to return. | yii\mongodb\Query
sum() | Returns the sum of the specified column values. | yii\mongodb\Query
trigger() | Triggers an event. | yii\base\Component
via() | Specifies the relation associated with the junction table. | yii\db\ActiveRelationTrait
where() | Sets the WHERE part of the query. | yii\db\QueryTrait
with() | Specifies the relations with which this query should be performed. | yii\db\ActiveQueryTrait

## Protected Methods

Hide inherited methods

Method | Description | Defined By
--- | --- | ---
aggregate() | Performs the aggregation for the given column. | yii\mongodb\Query
createModels() | Converts found rows into model instances. | yii\db\ActiveQueryTrait
fetchRows() | Fetches rows from the given Mongo cursor. | yii\mongodb\Query
fetchRowsInternal() |  | yii\mongodb\Query
filterCondition() | Removes empty operands from the given query condition. | yii\db\QueryTrait
isEmpty() | Returns a value indicating whether the give value is "empty". | yii\db\QueryTrait
normalizeOrderBy() | Normalizes format of ORDER BY data. | yii\db\QueryTrait

## Events

Hide inherited events

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

## Property Details

$collection public property

Collection instance. This property is read-only.

public yii\mongodb\Collection $collection = null

## 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 query and returns all results as an array.

public array|yii\mongodb\ActiveRecord all ( $db = null )
$db | yii\mongodb\Connection | The Mongo connection used to execute the query. If null, the Mongo connection returned by $modelClass will be used.
return | array|yii\mongodb\ActiveRecord | The query results. If the query results in nothing, an empty array will be returned.

getCollection() public method

Returns the Mongo collection for this query.

public yii\mongodb\Collection getCollection ( $db = null )
$db | yii\mongodb\Connection | Mongo connection.
return | yii\mongodb\Collection | Collection instance.

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 ( )

modify() public method

Performs 'findAndModify' query and returns a single row of result.

Warning: in case 'new' option is set to 'false' (which is by default) usage of this method may lead to unexpected behavior at some Active Record features, because object will be populated by outdated data.

public yii\mongodb\ActiveRecord|array|null modify ( $update, $options = [], $db = null )
$update | array | Update criteria
$options | array | List of options in format: optionName => optionValue.
$db | yii\mongodb\Connection | The Mongo connection used to execute the query.
return | yii\mongodb\ActiveRecord|array|null | The original document, or the modified document when $options['new'] is set. Depending on the setting of asArray(), the query result may be either an array or an ActiveRecord object. Null will be returned if the query results in nothing.

one() public method

Executes query and returns a single row of result.

public yii\mongodb\ActiveRecord|array|null one ( $db = null )
$db | yii\mongodb\Connection | The Mongo connection used to execute the query. If null, the Mongo connection returned by $modelClass will be used.
return | yii\mongodb\ActiveRecord|array|null | A single row of query result. Depending on the setting of asArray(), the query result may be either an array or an ActiveRecord object. Null will be returned if the query results in nothing.

populate() public method

Converts the raw query results into the format as specified by this query.

This method is internally used to convert the data fetched from MongoDB into the format as required by this query.

public array populate ( $rows )
$rows | array | The raw query result from MongoDB
return | array | The converted query result

prepare() public method (available since version 2.1.3)

Prepares for query building.

This method is called before actual query composition, e.g. building cursor, count etc. You may override this method to do some final preparation work before query execution.

public $this prepare ( )
return | $this | A prepared query instance.

## Event Details

EVENT_INIT event of type \yii\mongodb\Event

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