我有這樣的模型：class MyDict(models.Model):_name='my_module.my_dict'field1=fields.Char()field2=fields.Char()field3=fields.Char()數(shù)據(jù)看起來像：obj_1 | attr_1 | val_1obj_1 | attr_2 | val_1obj_1 | attr_2 | val_2obj_2 | attr_1 | val_1obj_2 | attr_1 | val_2從另一個模型我想逐步使用這個數(shù)據(jù)class NewModel(models.Model):_name='my_module.new_model'selection1=field.Selection(selection='_get_selection1')selection2=field.Selection(selection='_get_selection2')selection3=field.Selection(selection='_get_selection3')def _get_selection1(self):    my_list = []    selection_list = []    full_list = self.env['my_module.my_dict'].search([])    for record in full_list:       if record.field1 not in my_list:          my_list.append(record.field1)       for list_item in my_list:          selection_list.append((str(list_item), str(list_item)))    return selection_list第二個選擇需要取決于第一個@api.onchange('selection1')def _get_selection2(self):   my_list = []   selection_list = []   full_list = self.env['my_module.my_dict'].search([('field1', '=', self.selection1])   for record in full_list:      if record.field2 not in my_list:         my_list.append(record.field2)   for list_item in my_list:      selection_list.append((str(list_item), str(list_item)))   return selection_list但我在這里發(fā)現(xiàn)了錯誤File "/opt/odoo13/odoo/odoo/models.py", line 5817, in process    if res.get('value'):AttributeError: 'list' object has no attribute 'get'我怎樣才能得到 selection_list 取決于第一個選擇