Django unique_together

# Preferred alternative to unique_together, Django 2.2+
# Use the 'constraints' var in class Meta 
class Volume(models.Model):
    id = models.AutoField(primary_key=True)
    journal_id = models.ForeignKey(Journals, db_column='jid', null=True, verbose_name="Journal")
    volume_number = models.CharField('Volume Number', max_length=100)
    comments = models.TextField('Comments', max_length=4000, blank=True)

    class Meta:
        constraints = [
            models.UniqueConstraint(fields=['journal_id', 'volume_number'], name='name of constraint')
        ]

Source: stackoverflow.com

Unique_together what is used of it in django

unique_together = [['driver', 'restaurant']]

Source: docs.djangoproject.com

Similar codes

1 vote122 views1 answer
Django pass data between views
Python Django
1 vote170 views1 answer
Django foreign key error Cannot assign must be a instance
Python Django
0 vote164 views1 answer
Django trim string whitespace
Python Django
0 vote169 views1 answer
Django month name from month number
Python Django
0 vote194 views1 answer
The module in NAME could not be imported: django.contrib.user_auth.password_validation.UserAttributeSimilarityValidator. Check your AUTH_PASSWORD_VALI
Python Django
2 votes174 views1 answer
Django orm timestamp field
Python Django
0 vote169 views1 answer
Demploy django in vps
Python Django
0 vote161 views1 answer
How to add phone number to django user model
Python Django
2 votes177 views1 answer
Django EMAIL_BACKEND console
Python Django
3 votes169 views2 answers
Django radio button
Python Django