# MongoDB::ReadConcern - phpMan

## NAME
    [MongoDB::ReadConcern] - Encapsulate and validate a read concern

## VERSION
    version v2.2.2

## SYNOPSIS
        $rc = [MongoDB::ReadConcern]->new(); # no defaults

        $rc = [MongoDB::ReadConcern]->new(
            level    => 'local',
        );

## DESCRIPTION
    A Read Concern describes the constraints that MongoDB must satisfy when
    reading data. Read Concern was introduced in MongoDB 3.2.

## ATTRIBUTES
  level
    The read concern level determines the consistency level required of data
    being read.

    The default level is "undef", which means the server will use its
    configured default.

    If the level is set to "local", reads will return the latest data a
    server has locally.

    Additional levels are storage engine specific. See Read Concern
    <<http://docs.mongodb.org/manual/search/?query=readConcern>> in the
    MongoDB documentation for more details.

    This may be set in a connection string with the the "readConcernLevel"
    option.

## AUTHORS
    *   David Golden <<david@mongodb.com>>

    *   Rassi <<rassi@mongodb.com>>

    *   Mike Friedman <<friedo@friedo.com>>

    *   Kristina Chodorow <<k.chodorow@gmail.com>>

    *   Florian Ragwitz <<rafl@debian.org>>

## COPYRIGHT AND LICENSE
    This software is Copyright (c) 2020 by MongoDB, Inc.

    This is free software, licensed under:

      The Apache License, Version 2.0, January 2004