CODEWITHSUNDEEP
django
Armando Neto
Armando Neto

Reputation: 138

How to set a unique field to the relationship using Django?

I am building a tiny website host service, where an user can create a website and insert pages in it.

So I created the following classes:

class Website(models.Model):
    account = models.CharField(max_length=30, unique=True)
    custom_domain = models.CharField(max_length=130, blank=True, unique=True) #optional
    title = models.CharField(max_length=80)

class Page(models.Model):
    website = models.ForeignKey(Website)
    title = models.CharField(max_length=80)
    slug = models.CharField(max_length=80, unique=True)
    content = models.TextField()

I want to make the field 'slug' unique only to the relationship between Website and Page classes. This way two sites can have a page with the same slug. Like this:

 http://mysite.com/website_1/contact_page
 http://mysite.com/webiste_2/contact_page

But the field option 'unique' is intended for that.

Any tips or best practices in cases like this?

Upvotes: 0

Views: 81

Answers (1)

Sam Dolan
Sam Dolan

Reputation: 32542

Drop the unique requirement on the slug column and add a unique_together to the Page's Meta class.

class Page(models.Model):
    website = models.ForeignKey(Website)
    title = models.CharField(max_length=80)
    slug = models.CharField(max_length=80)
    content = models.TextField()

    class Meta:
        unique_together = ('website', 'slug')

Upvotes: 1

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