本文整理汇总了Python中django.db.models.SET属性的典型用法代码示例。如果您正苦于以下问题：Python models.SET属性的具体用法？Python models.SET怎么用？Python models.SET使用的例子？那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类django.db.models的用法示例。
在下文中一共展示了models.SET属性的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: ask_remove_enum_values
# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import SET [as 别名]
def ask_remove_enum_values(self, db_type, values):
""" How to treat records with deleted enum values. """
# Ordered ensures
choices = [
(models.CASCADE, "Cascade - Delete records with removed values"),
(models.PROTECT, "Protect - Block migrations if records contain removed values"),
(models.SET_NULL, "Set NULL - Set value to NULL"),
(models.SET_DEFAULT, "Set default - Set value to field default"),
(models.SET, "Set value - Provide a one off default now"),
(models.DO_NOTHING, "Do nothing - Consistency must be handled elsewhere"),
(None, "Leave it to field definitions")]
choice, _ = choices[self._choice_input(
"Enum {db_type} has had {values} removed, "
"existing records may need to be updated. "
"Override update behaviour or do nothing and follow field behaviour.".format(
db_type=db_type,
values=values),
[q for (k, q) in choices]) - 1]
if choice == models.SET:
return models.SET(self._ask_default())
return choice 示例2: test_serialize_functions
# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import SET [as 别名]
def test_serialize_functions(self):
with self.assertRaisesMessage(ValueError, 'Cannot serialize function: lambda'):
self.assertSerializedEqual(lambda x: 42)
self.assertSerializedEqual(models.SET_NULL)
string, imports = MigrationWriter.serialize(models.SET(42))
self.assertEqual(string, 'models.SET(42)')
self.serialize_round_trip(models.SET(42))