django model add a UniqueConstraint (without condition) in the model Meta.constraints.
时间: 2024-02-26 09:59:17 浏览: 27
Sure, here's an example of how to add a UniqueConstraint to a Django model in the Meta.constraints field:
```
from django.db import models
class MyModel(models.Model):
# fields go here
class Meta:
constraints = [
models.UniqueConstraint(fields=['field1', 'field2'], name='unique_constraint_name'),
]
```
In this example, we're adding a UniqueConstraint to the `MyModel` model, which will enforce that the combination of `field1` and `field2` is unique across all records in the database.
Note that the `name` parameter is optional, but it's good practice to give your constraints a meaningful name, especially if you plan on referencing them elsewhere in your code.