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)ENtry:# This is the statement that raises the exception except IntegrityErroraserr:if...
Django admin inline duplicate key value violates unique, In your meta description of the ToolResult class: class Meta: unique_together = ('content_type', 'object_id', 'tool') the unique together line says … Tags: duplicate key value violates unique constraint djangoduplicate key value violates...
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...
IntegrityError at /api/auth/login UNIQUE constraint failed: authtoken_token.user_id Request Method: POST Request URL: http://127.0.0.1:8000/api/auth/login Django Version: 2.2.16 Exception Type: IntegrityError Exception Value: UNIQUE constraint failed: authtoken_token.user_id Exception Location: D...
在Oracle 上对可空字段进行检查时,必须包含一个允许 NULL 值的条件,以使 validate() 的行为与检查约束验证相同。例如,如果 age 是可空字段: CheckConstraint(check=Q(age__gte=18) | Q(age__isnull=True), name="age_gte_18") Changed in Django 4.1: 添加了``violation_error_message`` 参数。Uni...
django.db.utils.IntegrityError: duplicate key value violates unique constraint 在花了一些时间研究之后,我看到Django Rest框架提供了“UniqueTogetherValidator”。所以我加了这样一句: class ReviewCreateSerializer(ModelSerializer): class Meta: model = Review ...
UniqueConstraint¶ class UniqueConstraint(*expressions, fields=(), name=None, condition=None, deferrable=None, include=None, opclasses=(), nulls_distinct=None, violation_error_code=None, violation_error_message=None)[source]¶ Creates a unique constraint in the database. expressions¶ Unique...
Sqlite - constraint failed[0x1555]: UNIQUE constraint failed 2018-03-01 15:41 −执行插入操作时,出现异常constraint failed[0x1555]: UNIQUE constraint failed 意思是:sqlite 唯一约束失败 定位于某个表字段上,该字段是表的主键。 原因:插入的数据中该主键字段值在表中已有存在的记录。 解决方案:重新调整插...
IntegrityError duplicate key value violates unique constraint - django/postgres SELECTsetval('tablename_id_seq', (SELECTMAX(id)FROMtablename)+1)