Django TestCase 适用于 Sqlite3 - 不适用于 Postgres

如何解决Django TestCase 适用于 Sqlite3 - 不适用于 Postgres

我想弄清楚为什么我的测试适用于 sqlite3 但不适用于 Postgres。

导入操作系统

from django.conf import settings
from django.test import TestCase

from products.factory import ProductFactory
from products.models import Product,Organisation
from products.services.imports import ImportService
from users.factory import UserFactory,OrganisationFactory
from users.models import User


class ProductTestCase(TestCase):
    @classmethod
    def setUpTestData(cls) -> None:
        cls.org = OrganisationFactory.create(name='My organisation')
        cls.user = User.objects.create_user('peter','xxxxxxxx')
        cls.user.organisation = cls.org
        cls.product = ProductFactory.create(title='Title',created_by=cls.user,organisation=cls.org)


    def test_product_has_organisation(self) -> None:
        self.assertTrue(self.product.organisation,'Product has no organisation')

当使用 Postgres 运行它时，它会引发：

ERROR: test_product_has_organisation (products.tests.test_product.ProductTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/milano/PycharmProjects/.virtualenvs/markethelper_api/lib/python3.9/site-packages/django/db/backends/utils.py",line 82,in _execute
    return self.cursor.execute(sql)
psycopg2.errors.Foreignkeyviolation: insert or update on table "products_product" violates foreign key constraint "products_product_updated_by_id_33940c75_fk_users_user_id"
DETAIL:  Key (updated_by_id)=(19) is not present in table "users_user".

Product.updated_by：

updated_by = CurrentUserField('users.User',on_delete=models.CASCADE,related_name='updated_products',null=True,blank=True,verbose_name='Updated by',on_update=True)

你知道问题出在哪里吗？