code: def _get_to_many_relationship_value(self, obj, column):
          
          related_key = column.get('related_key', None)
  
          related = getattr(obj, column['__col__'].key)
          value = {}
          if related:
              total = len(related)
              for index, rel_obj in enumerate(related):
                  if related_key:
                      compiled_res = self._get_formatted_val(
                          rel_obj, related_key, column
                      )
                  else:
                      compiled_res = column['__prop__'].compile_obj(
                          rel_obj
                      )
                  value['item_%d' % index] = compiled_res
                  value[str(index)] = compiled_res
                  value["_" + str(index)] = compiled_res
  
                  if index == 0:
                      value['first'] = compiled_res
  
                  if index == total - 1:
                      value['last'] = compiled_res
  
          return value
docs: Get the resulting datas for a One To many or a many to many relationship
  
          :param obj obj: The instance we manage
          :param dict column: The column description dictionnary
          :returns: The associated value