本文整理匯總了Python中django.db.models.SET屬性的典型用法代碼示例。如果您正苦於以下問題：Python models.SET屬性的具體用法？Python models.SET怎麽用？Python models.SET使用的例子？那麽, 這裏精選的屬性代碼示例或許可以為您提供幫助。您也可以進一步了解該屬性所在類django.db.models的用法示例。
在下文中一共展示了models.SET屬性的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: ask_remove_enum_values
# 需要導入模塊: from django.db import models [as 別名]
# 或者: from django.db.models import SET [as 別名]
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
# 需要導入模塊: from django.db import models [as 別名]
# 或者: from django.db.models import SET [as 別名]
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))