# Class yii\mongodb\log\MongoDbTarget

Inheritance | yii\mongodb\log\MongoDbTarget » yii\log\Target » yii\base\Component » yii\base\BaseObject
Implements | yii\base\Configurable
Available since version | 2.0
Source Code | https://github.com/yiisoft/yii2-mongodb/blob/master/log/MongoDbTarget.php

MongoDbTarget stores log messages in a MongoDB collection.

By default, MongoDbTarget stores the log messages in a MongoDB collection named 'log'. The collection can be changed by setting the $logCollection property.

## Public Properties

Hide inherited properties

Property | Type | Description | Defined By
--- | --- | --- | ---
$behaviors | yii\base\Behavior[] | List of behaviors attached to this component. This property is read-only. | yii\base\Component
$categories | array | List of message categories that this target is interested in. | yii\log\Target
$db | yii\mongodb\Connection|string | The MongoDB connection object or the application component ID of the MongoDB connection. | yii\mongodb\log\MongoDbTarget
$enabled | boolean | Indicates whether this log target is enabled. Defaults to true. Note that the type of this property differs in getter and setter. See getEnabled() and setEnabled() for details. | yii\log\Target
$except | array | List of message categories that this target is NOT interested in. | yii\log\Target
$exportInterval | integer | How many messages should be accumulated before they are exported. | yii\log\Target
$levels | integer | The message levels that this target is interested in. This is a bitmap of level values. Defaults to 0, meaning all available levels. Note that the type of this property differs in getter and setter. See getLevels() and setLevels() for details. For more details and usage information on Target, see the guide article on logging & targets. | yii\log\Target
$logCollection | string|array | The name of the MongoDB collection that stores the session data. | yii\mongodb\log\MongoDbTarget
$logVars | array | List of the PHP predefined variables that should be logged in a message. | yii\log\Target
$maskVars | array | List of the PHP predefined variables that should NOT be logged "as is" and should always be replaced with a mask `***` before logging, when exist. | yii\log\Target
$messages | array | The messages that are retrieved from the logger so far by this log target. | yii\log\Target
$microtime | boolean | Whether to log time with microseconds. | yii\log\Target
$prefix | callable | A PHP callable that returns a string to be prefixed to every exported message. | yii\log\Target

## Public Methods

Hide inherited methods

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
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
collect() | Processes the given log messages. | yii\log\Target
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
export() | Stores log messages to MongoDB collection. | yii\mongodb\log\MongoDbTarget
filterMessages() | Filters the given messages according to their categories and levels. | yii\log\Target
formatMessage() | Formats a log message for display as a string. | yii\log\Target
getBehavior() | Returns the named behavior object. | yii\base\Component
getBehaviors() | Returns all behaviors attached to this component. | yii\base\Component
getEnabled() | Check whether the log target is enabled. | yii\log\Target
getLevels() |  | yii\log\Target
getMessagePrefix() | Returns a string to be prefixed to the given message. | yii\log\Target
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 MongoDbTarget component. | yii\mongodb\log\MongoDbTarget
off() | Detaches an existing event handler from this component. | yii\base\Component
on() | Attaches an event handler to an event. | yii\base\Component
setEnabled() | Sets a value indicating whether this log target is enabled. | yii\log\Target
setLevels() | Sets the message levels that this target is interested in. | yii\log\Target
trigger() | Triggers an event. | yii\base\Component

## Protected Methods

Hide inherited methods

Method | Description | Defined By
--- | --- | ---
getContextMessage() | Generates the context information to be logged. | yii\log\Target
getTime() | Returns formatted ('Y-m-d H:i:s') timestamp for message. | yii\log\Target

## Property Details

$db public property

The MongoDB connection object or the application component ID of the MongoDB connection. After the MongoDbTarget object is created, if you want to change this property, you should only assign it with a MongoDB connection object.

public yii\mongodb\Connection|string $db = 'mongodb'
$logCollection public property

The name of the MongoDB collection that stores the session data. Please refer to yii\mongodb\Connection::getCollection() on how to specify this parameter. This collection is better to be pre-created with fields 'id' and 'expire' indexed.

public string|array $logCollection = 'log'

## Method Details

export() public method

Stores log messages to MongoDB collection.

public void export ( )

init() public method

Initializes the MongoDbTarget component.

This method will initialize the $db property to make sure it refers to a valid MongoDB connection.

public void init ( )
throws | yii\base\InvalidConfigException | if $db is invalid.