This module was written to extend the functionality of
    saving a record in the web interface.

    .. warning::

        In no way this module stops the save of the record.
        You must consider this as a warning displayed
        to the user AFTER save completed.

    If you don't want OpenERP to save the record, you should use constraints.

    Usage
    =====

    To use this module, you need to:

    * write a method called 'check_warning_on_save' which will make some checks
      and return a string

    example :

    def check_warning_on_save(self, cr, uid, id, context=None):
        '''
            @param: int: record_id
            @return: string: message that should be displayed to the user
        '''
        res = ""

        record = self.browse(cr, uid, id, context=context)
        # ... make some checks

        return res