NAME

       Wiki::Toolkit::Store::Pg - Postgres storage backend for Wiki::Toolkit

REQUIRES

       Subclasses Wiki::Toolkit::Store::Database.

SYNOPSIS

       See Wiki::Toolkit::Store::Database

METHODS

       check_and_write_node
             $store->check_and_write_node( node     => $node,
                           checksum => $checksum,
                                           %other_args );

           Locks the node, verifies the checksum, calls "write_node_post_locking" with all
           supplied arguments, unlocks the node. Returns the version of the updated node on
           successful writing, 0 if checksum doesn't match, -1 if the change was not applied,
           croaks on error.