Django覆盖了Django为UniqueConstraint错误显示的错误消息。在Django中,UniqueConstraint用于确保数据库表中的某些列的唯一性。当违反唯一性约束时,Django会抛出IntegrityError异常,并显示默认的错误消息。 要覆盖UniqueConstraint错误消息,可以通过自定义模型的clean()方法来实现。在clean()方法中,可以检查唯一性约束...
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...
You got the error because unique = True in name = models.CharField(max_length=128, unique=True) means that Django will raise constraint errror UNIQUE constraint failed in case you trying to save a new instance with the same name value; A violation of the unique constraint get_or_create doe...
在Django中,可以使用UniqueConstraint类来定义模型的唯一约束。下面是一个示例: from django.db import models class MyModel(models.Model): field1 = models.CharField(max_length=100) field2 = models.CharField(max_length=100) class Meta: constraints = [ models.UniqueConstraint(fields=['field1', 'field...
duplicate key value violates unique constraint "blogs_blog_pkey" DETAIL: Key (id)=(21) already exists. Not sure what is happening here. Django fetches the data from db and sends it to the browser, but it doesn't "see" the ID while trying to write the data to the db. I...
我不确定这是否是解决问题的最好方法，但如果其他人遇到这个问题，我确实找到了一个解决方案。我认为验证...
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...
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...
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...
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...