在Django REST框架中,如果你发现自定义用户模型上的UniqueConstraint不起作用,可能是由于以下几个原因: 基础概念 UniqueConstraint是Django ORM中的一个约束,用于确保数据库表中的某些字段组合是唯一的。这在创建用户模型时尤其重要,以确保用户名或电子邮件地址的唯一性。
(IntegrityError)EN错误: No module named 模块名称 找不到模块，需要将模块添加到Python的搜索目录中。
if 'UNIQUE constraint failed' in exception.args[0]: print('duplicate order id => skip this') continue 您还可以使用get_or_create来实现您想要的:for json_obj in json_data: obj, created = Order.objects.get_or_create( symbol=json_obj['order_id'], defaults={'amount': json_obj['amnount...
Django 联合唯一UniqueConstraint 1 2 3 4 5 6 7 8 9 10 from django.db import models class UserAttention(models.Model): watcher = models.ForeignKey('user.User', on_delete=models.CASCADE, related_name="attention") goal = models.ForeignKey('goal.Goal', on_delete=models.CASCADE, related_name...
class BaseConstraint(name, violation_error_message=None)¶ 所有约束的基类。子类必须实现 constraint_sql(), create_sql(), remove_sql() 和validate() 方法。 所有约束都有以下共同的参数: name¶ BaseConstraint.name¶ 约束的名称。你必须始终为约束指定一个唯一的名称。 violation_error_message¶ Ne...
ERROR : django.db.utils.IntegrityError: UNIQUE constraint failed: users_customuser.email Posted on 2024年3月18日 at 08:47 byStack OverflowRSS I'm learning Django but I keep getting this error when I type : django.db.utils.IntegrityError: UNIQUE constraint failed: users_customuser.email I Have...
Hi I am trying to create a form with parent-child models using python Django Inlineformset_factory but when I am trying to update the child, its giving me unique constraint error. Here I am sharing my model code, forms code, views code. I am trying to solve this issue since last two...
The newCONN_HEALTH_CHECKSsetting allows enabling health checks forpersistent database connectionsin order to reduce the number of failed requests, e.g. after database server restart. QuerySet.bulk_create()now supports updating fields when a row insertion fails uniqueness constraints. This is supporte...
概述:bug in manage.py migrate when changing the field type of a foreign key with a constraint→MySQL: 1215 - "Cannot add foreign key constraint" when altering type of unique field referenced by ForeignKey. 版本:2.2→master Thanks for detailed report.#30152is related but it doesn't fix the...
I think changing the format of index name if the CONSTRAINT is create by the unique_together will work either. e.g.: ALTER TABLE `testapp_mymodel` ADD CONSTRAINT `testapp_mymodel_name_ba5e2bd2_uniq_by_unique_together` UNIQUE (`name`); ALTER TABLE `testapp_mymodel` ADD CONSTRAINT `...