Class yii\mongodb\Query

Inheritanceyii\mongodb\Query » yii\base\Component
Implementsyii\db\QueryInterface
Uses Traitsyii\db\QueryTrait
Subclassesyii\mongodb\ActiveQuery, yii\mongodb\file\ActiveQuery, yii\mongodb\file\Query
Available since version2.0

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

Hide inherited properties

PropertyTypeDescriptionDefined By
$from string|array The collection to be selected from. yii\mongodb\Query
$options array Cursor options in format: optionKey => optionValue yii\mongodb\Query
$select array The fields of the results to return. yii\mongodb\Query

Public Methods

Hide inherited methods

MethodDescriptionDefined By
addOptions() Adds additional cursor options. yii\mongodb\Query
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
average() Returns the average of the specified column values. yii\mongodb\Query
batch() Starts a batch query. yii\mongodb\Query
buildCursor() Builds the MongoDB cursor for this query. yii\mongodb\Query
column() Executes the query and returns the first column of the result. yii\mongodb\Query
count() Returns the number of records. yii\mongodb\Query
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
exists() Returns a value indicating whether the query result contains any row of data. yii\mongodb\Query
from() Sets the collection to be selected from. yii\mongodb\Query
getCollection() Returns the Mongo collection for this query. yii\mongodb\Query
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
one() Executes the query and returns a single row of result. yii\mongodb\Query
options() Sets the cursor options. yii\mongodb\Query
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

Protected Methods

Hide inherited methods

MethodDescriptionDefined 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

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

See also from().

public string|array $from null
$options public property

Cursor options in format: optionKey => optionValue

See also:

public array $options = []
$select public property

The fields of the results to return. For example: ['name', 'group_id'], ['name' => true, '_id' => false]. Unless directly excluded, the "_id" field is always returned. If not set, it means selecting all columns.

See also select().

public array $select = []

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.

See also addOptions().

public $this options ( $options )
$options array

Cursor options in format: optionName => optionValue

return $this

The query object itself

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 database into the format as required by this query.

public array populate ( $rows )
$rows array

The raw query result from database

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.

scalar() public method (available since version 2.1.2)

Returns the query result as a scalar value.

The value returned will be the first column in the first row of the query results. Column _id will be automatically excluded from select fields, if select() is not empty and _id is not selected explicitly.

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.

select() public method

Sets the list of fields of the results to return.

public $this select ( array $fields )
$fields array

Fields of the results to return.

return $this

The query object itself.

sum() public method

Returns the sum of the specified column values.

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