Class yii\mongodb\Query

All Classes | Properties | Methods

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

Query represents Mongo "find" operation.

Query provides a set of methods to facilitate the specification of "find" command. These methods can be chained together.

For example,

$query = new Query();
// compose the query
$query->select(['name', 'status'])
    ->from('customer')
    ->limit(10);
// execute the query
$rows = $query->all();

Public Properties

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Property	Type	Description	Defined By
$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
$limit	integer\|yii\db\ExpressionInterface	Maximum number of records to be returned.	yii\db\QueryTrait
$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
$select	array	The fields of the results to return.	yii\mongodb\Query
$where	string\|array\|yii\db\ExpressionInterface	Query condition.	yii\db\QueryTrait

Public Methods

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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
addOptions()	Adds additional cursor options.	yii\mongodb\Query
addOrderBy()	Adds additional ORDER BY columns to the query.	yii\db\QueryTrait
all()	Executes the query and returns all results as an array.	yii\mongodb\Query
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
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
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\Query
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\base\BaseObject
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\Query
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 the query and returns a single row of result.	yii\mongodb\Query
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\Query
prepare()	Prepares for query building.	yii\mongodb\Query
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
where()	Sets the WHERE part of the query.	yii\db\QueryTrait

Protected Methods

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Method	Description	Defined By
aggregate()	Performs the aggregation for the given column.	yii\mongodb\Query
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

Property Details

$from public property

The collection to be selected from. If string considered as the name of the collection inside the default database. If array - first element considered as the name of the database, second - as name of collection inside that database

Method Details

addOptions() public method

Adds additional cursor options.

See also options().

public $this addOptions ( $options )
$options	array	Cursor options in format: optionName => optionValue
return	$this	The query object itself

aggregate() protected method

Performs the aggregation for the given column.

protected integer aggregate ( $column, $operator, $db )
$column	string	Column name.
$operator	string	Aggregation operator.
$db	yii\mongodb\Connection	The database connection used to execute the query.
return	integer	Aggregation result.

all() public method

Executes the query and returns all results as an array.

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

andFilterCompare() public method (available since version 2.0.5)

Helper method for easy querying on values containing some common operators.

The comparison operator is intelligently determined based on the first few characters in the given value and internally translated to a MongoDB operator. In particular, it recognizes the following operators if they appear as the leading characters in the given value: <: the column must be less than the given value ($lt). >: the column must be greater than the given value ($gt). <=: the column must be less than or equal to the given value ($lte). >=: the column must be greater than or equal to the given value ($gte). <>: the column must not be the same as the given value ($ne). Note that when $partialMatch is true, this would mean the value must not be a substring of the column. =: the column must be equal to the given value ($eq). none of the above: use the $defaultOperator

Note that when the value is empty, no comparison expression will be added to the search condition.

See also yii\mongodb\Collection::buildCondition().

public $this andFilterCompare ( $name, $value, $defaultOperator = '=' )
$name	string	Column name
$value	string	Column value
$defaultOperator	string	Defaults to =, performing an exact match. For example: use 'LIKE' or 'REGEX' for partial cq regex matching
return	$this	The query object itself.

average() public method

Returns the average of the specified column values.

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

batch() public method (available since version 2.1)

Starts a batch query.

A batch query supports fetching data in batches, which can keep the memory usage under a limit. This method will return a yii\mongodb\BatchQueryResult object which implements the Iterator interface and can be traversed to retrieve the data in batches.

For example,

$query = (new Query)->from('user');
foreach ($query->batch() as $rows) {
    // $rows is an array of 10 or fewer rows from user collection
}

public yii\mongodb\BatchQueryResult batch ( $batchSize = 100, $db = null )
$batchSize	integer	The number of records to be fetched in each batch.
$db	yii\mongodb\Connection	The MongoDB connection. If not set, the "mongodb" application component will be used.
return	yii\mongodb\BatchQueryResult	The batch query result. It implements the `Iterator` interface and can be traversed to retrieve the data in batches.

buildCursor() public method

Builds the MongoDB cursor for this query.

public \MongoDB\Driver\Cursor buildCursor ( $db = null )
$db	yii\mongodb\Connection	The MongoDB connection used to execute the query.
return	\MongoDB\Driver\Cursor	Mongo cursor instance.

column() public method (available since version 2.1.2)

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

Column _id will be automatically excluded from select fields, if select() is not empty and _id is not selected explicitly.

public array column ( $db = null )
$db	yii\mongodb\Connection	The MongoDB connection used to generate the query. If this parameter is not given, the `mongodb` 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	Kept to match yii\db\QueryInterface, its value is ignored.
$db	yii\mongodb\Connection	The Mongo connection used to execute the query. If this parameter is not given, the `mongodb` application component will be used.
return	integer	Number of records
throws	yii\mongodb\Exception	on failure.

distinct() public method

Returns a list of distinct values for the given column across a collection.

public array distinct ( $q, $db = null )
$q	string	Column to use.
$db	yii\mongodb\Connection	The MongoDB connection used to execute the query. If this parameter is not given, the `mongodb` application component will be used.
return	array	Array of distinct values

each() public method (available since version 2.1)

Starts a batch query and retrieves data row by row.

This method is similar to batch() except that in each iteration of the result, only one row of data is returned. For example,

$query = (new Query)->from('user');
foreach ($query->each() as $row) {
}

public yii\mongodb\BatchQueryResult each ( $batchSize = 100, $db = null )
$batchSize	integer	The number of records to be fetched in each batch.
$db	yii\mongodb\Connection	The MongoDB connection. If not set, the "mongodb" application component will be used.
return	yii\mongodb\BatchQueryResult	The batch query result. It implements the `Iterator` interface and can be traversed to retrieve the data in batches.

exists() public method

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

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

fetchRows() protected method

Fetches rows from the given Mongo cursor.

protected array\|boolean fetchRows ( $cursor, $all = true, $indexBy = null )
$cursor	\MongoDB\Driver\Cursor	Mongo cursor instance to fetch data from.
$all	boolean	Whether to fetch all rows or only first one.
$indexBy	string\|callable	The column name or PHP callback, by which the query results should be indexed by.
return	array\|boolean	Result.
throws	yii\mongodb\Exception	on failure.

fetchRowsInternal() protected method

protected array\|boolean fetchRowsInternal ( $cursor, $all )
$cursor	\MongoDB\Driver\Cursor	Mongo cursor instance to fetch data from.
$all	boolean	Whether to fetch all rows or only first one.
return	array\|boolean	Result.

from() public method

Sets the collection to be selected from.

public $this from ( $collection )
$collection
return	$this	The query object itself.

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.

max() public method

Returns the maximum of the specified column values.

public integer max ( $q, $db = null )
$q	string	The column name. Make sure you properly quote column names in the expression.
$db	yii\mongodb\Connection	The MongoDB connection used to execute the query. If this parameter is not given, the `mongodb` 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 ( $q, $db = null )
$q	string	The column name. Make sure you properly quote column names in the expression.
$db	yii\mongodb\Connection	The MongoDB 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.

modify() public method

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

public 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	array\|null	The original document, or the modified document when $options['new'] is set.

one() public method

Executes the query and returns a single row of result.

public array\|false one ( $db = null )
$db	yii\mongodb\Connection	The Mongo connection used to execute the query. If this parameter is not given, the `mongodb` application component will be used.
return	array\|false	The first row (in terms of an array) of the query result. `false` is returned if the query results in nothing.

options() public method

Sets the cursor options.

public $this options ( $options )
$options	array	Cursor options in format: optionName => optionValue
return	$this	The query object itself

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

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

public string\|null\|false scalar ( $db = null )
$db	yii\mongodb\Connection	The MongoDB connection used to generate the query. If this parameter is not given, the `mongodb` application component will be used.
return	string\|null\|false	The value of the first column in the first row of the query result. `false` is returned if the query result is empty.

public $this select ( array $fields )
$fields	array	Fields of the results to return.
return	$this	The query object itself.

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