'Validate the page sizes, but don\'t return any filters.'

def filter_page_size(self, value):

    try:
        page_size = fields.IntegerField().to_internal_value(value)
    except fields.ValidationError:
        page_size = 20
    if (not (1 <= page_size < 100)):
        page_size = 100
    self.query_values['page_size'] = page_size
    return F()
