docs: def insert(self):
          """persist the field values of this orm"""
          ret = True
  
          schema = self.schema
          fields = self.depopulate(False)
  
          q = self.query
          q.set_fields(fields)
          pk = q.insert()
          if pk:
              fields = q.fields
              fields[schema.pk.name] = pk
              self._populate(fields)
  
          else:
              ret = False
  
          return ret