docs: def insert(self):
          """persist the .fields"""
          self.default_val = 0
          #fields = self.fields
          #fields = self.orm_class.depart(self.fields, is_update=False)
          #self.set_fields(fields)
          return self.interface.insert(
              self.schema,
              self.fields
          )
  
          return self.interface.insert(self.schema, self.fields)