'Adds the following filters:
`community_rating`: filter'

def _add_parsers(self):

    self.fn_filter_parsers.update({'community_rating': {'op': {'eq': (lambda i, v: (self._ratings_avg_accessor(i) == v)), 'ge': (lambda i, v: (self._ratings_avg_accessor(i) >= v)), 'le': (lambda i, v: (self._ratings_avg_accessor(i) <= v))}, 'val': float}})
