How can you define two foreign keys to the same model as unique together in Django?

1 Answers
Answered by suresh

To define two foreign keys to the same model as unique together in Django, you can use the `UniqueConstraint` option in the `Meta` class of the model. Here is an example of how to achieve this:

```html

Defining Two Foreign Keys as Unique Together in Django

How to Define Two Foreign Keys as Unique Together in Django

In Django, you can define two foreign keys to the same model as unique together by using the UniqueConstraint option in the Meta class of the model.


from django.db import models

class MyModel(models.Model):
first_foreign_key = models.ForeignKey('RelatedModel', on_delete=models.CASCADE)
second_foreign_key = models.ForeignKey('RelatedModel', on_delete=models.CASCADE)

class Meta:
constraints = [
models.UniqueConstraint(fields=['first_foreign_key', 'second_foreign_key'], name='unique_together_constraint')
]

By adding the UniqueConstraint with the fields of the two foreign keys in the Meta class of the model, you ensure that the combination of these two foreign keys will be unique together.

```

By following this approach, you can easily define two foreign keys to the same model as unique together in Django, which can be beneficial in various scenarios while maintaining data integrity and consistency in your database.

Answer for Question: How can you define two foreign keys to the same model as unique together in Django?