# perldoc > Net::LDAP::Control::Assertion

## NAME
    [Net::LDAP::Control::Assertion](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP%3A%3AControl%3A%3AAssertion/markdown) - LDAPv3 Assertion Control

## SYNOPSIS
     use [Net::LDAP](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP/markdown);
     use [Net::LDAP::Control::Assertion](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP%3A%3AControl%3A%3AAssertion/markdown);

     $ldap = [Net::LDAP](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP/markdown)->new( "ldap.mydomain.eg" );

     $assert = [Net::LDAP::Control::Assertion](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP%3A%3AControl%3A%3AAssertion/markdown)->new( assertion => '(sn=Jensen)' );

     my $mesg = $ldap->modify( "cn=Barbara Jensen, o=University of Michigan, c=US",
                               replace => { givenName => "Babs" },
                               control => $assert );

## DESCRIPTION
    "[Net::LDAP::Control::Assertion](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP%3A%3AControl%3A%3AAssertion/markdown)" provides an interface for the creation and manipulation of
    objects that represent the "Assertion Control" as described by RFC 4528.

    The "Assertion Control" allows the client to specify a condition, an assertion, that must be
    TRUE for the operation to be processed normally. Otherwise, the operation is not performed. For
    instance, the control can be used with the Modify operation to perform atomic "test and set" and
    "test and clear" operations.

    The control is appropriate for both LDAP interrogation and update operations, including Add,
    Compare, Delete, Modify, ModifyDN (rename), and Search.

## CONSTRUCTOR ARGUMENTS
    In addition to the constructor arguments described in [Net::LDAP::Control](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP%3A%3AControl/markdown) the following are
    provided.

    assertion => FILTER
        A filter specifying the assertion that must evaluate to TRUE in order to make the operation
        process normally.

## METHODS
    As with [Net::LDAP::Control](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP%3A%3AControl/markdown) each constructor argument described above is also available as a
    method on the object which will return the current value for the attribute if called without an
    argument, and set a new value for the attribute if called with an argument.

## SEE ALSO
    [Net::LDAP](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP/markdown), [Net::LDAP::Control](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ALDAP%3A%3AControl/markdown), <http://www.ietf.org/rfc/rfc4528.txt>

## AUTHOR
    Peter Marschall <<peter@adpm.de>>

    Please report any bugs, or post any suggestions, to the perl-ldap mailing list
    <<perl-ldap@perl.org>>

## COPYRIGHT
    Copyright (c) 2011 Peter Marschall. All rights reserved. This program is free software; you can
    redistribute it and/or modify it under the same terms as Perl itself.