python - Django 无法加载测试装置，IntegrityError

Question

我正在使用 Saleor/Satchless给力和电子商务网站(继承项目)。我找不到 Saleor 邮寄列表，所以在这里发帖。

I dumped the DB to create some test fixtures .

./manage.py dumpdata -e contenttypes -e sessions -e south -e > payments_data.json

当我运行测试并且 django 尝试加载 fixture 时，它​​会拒绝它。我正在使用 Postgres 作为数据库，虽然不是很熟悉，但似乎加载数据的顺序可能有问题

有什么办法绕过它吗？

======================================================================
ERROR: test__hometryon_extra_pair_sizes (payment.tests.InterstitialTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/test/testcases.py", line 259, in __call__
self._pre_setup()
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/test/testcases.py", line 479, in _pre_setup
self._fixture_setup()
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/test/testcases.py", line 849, in _fixture_setup
'skip_validation': True,
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/core/management/__init__.py", line 161, in call_command
return klass.execute(*args, **defaults)
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/core/management/base.py", line 255, in execute
output = self.handle(*args, **options)
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 224, in handle
connection.check_constraints(table_names=table_names)
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 132, in check_constraints
self.cursor().execute('SET CONSTRAINTS ALL IMMEDIATE')
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 56, in execute
six.reraise(utils.IntegrityError, utils.IntegrityError(*tuple(e.args)), sys.exc_info()[2])
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 54, in execute
return self.cursor.execute(query, args)
IntegrityError: Problem installing fixtures: insert or update on table "product_ship" violates foreign key constraint "product_ship_product_ptr_id_fkey"
DETAIL:  Key (product_ptr_id)=(1) is not present in table "product_product".

更新:开始玩弄 django-fixture-magic我发现 product.product 实际上并没有被转储，即使我做了一个$ python manage.py dumpdata --indent=4 --all -e contenttypes -e sessions -e south > fulldb.json

更新 2:在转储数据中包含内容类型后，实际数据中仍然缺少 product.product。我不得不为 product.product 和 order_deliverygroup 手动执行 dump_object 和 merge_fixture。加载夹具时，两者都给出了以下类似的错误:

IntegrityError: Problem installing fixtures: insert or update on table "order_shippeddeliverygroup" violates foreign key constraint "order_shippeddeliverygroup_deliverygroup_ptr_id_fkey" DETAIL:  Key (deliverygroup_ptr_id)=(1) is not present in table "order_deliverygroup".

我现在遇到了关于 Contenttypes 的问题

IntegrityError: Problem installing fixture '/Users/andres/Documents/projects/rpmwest/rpmwest/payment/fixtures/payments_data.json': Could not load contenttypes.ContentType(pk=5): duplicate key value violates unique constraint "django_content_type_app_label_model_key"DETAIL:  Key (app_label, model)=(product, digitalship) already exists.

查看fixture里面的数据，果然有，但是只有一个。它是否与最初同步模型时创建内容类型的数据库发生冲突？

如果我遗漏了内容类型，我会收到以下错误:

Traceback (most recent call last):
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/test/testcases.py", line 259, in __call__
self._pre_setup()
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/test/testcases.py", line 479, in _pre_setup
self._fixture_setup()
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/test/testcases.py", line 849, in _fixture_setup
'skip_validation': True,
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/core/management/__init__.py", line 161, in call_command
return klass.execute(*args, **defaults)
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/core/management/base.py", line 255, in execute
output = self.handle(*args, **options)
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 224, in handle
connection.check_constraints(table_names=table_names)
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 132, in check_constraints
self.cursor().execute('SET CONSTRAINTS ALL IMMEDIATE')
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 56, in execute
six.reraise(utils.IntegrityError, utils.IntegrityError(*tuple(e.args)), sys.exc_info()[2])
  File "/Users/andres/.virtualenvs/rpmwest/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 54, in execute
return self.cursor.execute(query, args)
IntegrityError: Problem installing fixtures: insert or update on table "django_admin_log" violates foreign key constraint "django_admin_log_content_type_id_fkey" DETAIL:  Key (content_type_id)=(22) is not present in table "django_content_type".

Answer 1

似乎 django dumpdata 以错误的顺序转储了固定装置。查看 json 文件以检查是否存在带有 id: 1 的 product。如果，如我所想，这是真的，请使用一些更复杂的工具来转储数据，例如 django-fixture-magic

或者，您可能希望在上传之前通过数据库引擎删除所有完整性约束，并尝试在上传之后立即重新创建它们，但如果存在一些完整性错误，这会有些冒险。

对于 PostgreSQL，请咨询 this thread了解如何获取表定义。在 MySQL 中，它会像下面这样:

$ mysqldump --no-data -utest django auth_user_user_permissions
CREATE TABLE `auth_user_user_permissions` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `permission_id` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `user_id` (`user_id`,`permission_id`),
  KEY `auth_user_user_permissions_403f60f` (`user_id`),
  KEY `auth_user_user_permissions_1e014c8f` (`permission_id`),
  CONSTRAINT `user_id_refs_id_dfbab7d` FOREIGN KEY (`user_id`) REFERENCES `auth_user` (`id`),
  CONSTRAINT `permission_id_refs_id_67e79cb` FOREIGN KEY (`permission_id`) REFERENCES `auth_permission` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

以下部分应该适用于 oracle、postgre 和 mysql

> alter table `auth_user_user_permissions` drop foreign key `user_id_refs_id_dfbab7d`;
Query OK, 0 rows affected (0.97 sec)
Records: 0  Duplicates: 0  Warnings: 0

> alter table `auth_user_user_permissions` add CONSTRAINT `user_id_refs_id_dfbab7d` FOREIGN KEY (`user_id`) references `auth_user` (`id`);
Query OK, 0 rows affected (0.95 sec)
Records: 0  Duplicates: 0  Warnings: 0