code: def _create_m2m_links_step(self, rel_model_name,
                             rel_key, rel_value, relation_name):
      
  
      lookup = {rel_key: rel_value}
      rel_model = get_model(rel_model_name).objects.get(**lookup)
      relation = None
      for m2m in rel_model._meta.many_to_many:
          if relation_name in (m2m.name, m2m.verbose_name):
              relation = getattr(rel_model, m2m.name)
              break
      if not relation:
          try:
              relation = getattr(rel_model, relation_name)
          except AttributeError:
              pass
      assert relation, \
          "%s does not have a many-to-many relation named '%s'" % (
              rel_model._meta.verbose_name.capitalize(),
              relation_name,
          )
      m2m_model = relation.model
  
      for hash_ in self.hashes:
          relation.add(m2m_model.objects.get(**hash_))
docs: Link many-to-many models together.
  
      Syntax:
  
          And `model` with `field` "`value`" is linked to `other model` in the
          database:
  
      Example:
  
      .. code-block:: gherkin
  
          And article with name "Guidelines" is linked to tags in the database:
              | name   |
              | coding |
              | style  |