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

0 vote128 views2 answers
Render template in django
Python Django
0 vote121 views1 answer
Django filter queryset by date
Python Django
0 vote142 views1 answer
Django.db.utils.ProgrammingError: relation "users" does not exist in django 3.0
Python Django
4 votes133 views2 answers
Arrayfield django example
Python Django
0 vote146 views1 answer
How to submit two forms in django
Python Django
0 vote132 views1 answer
Django include all columns admin show
Python Django
1 vote141 views1 answer
Django urlpattern
Python Django
10 votes132 views1 answer
Add static file in django
Python Django
0 vote158 views1 answer
Django database connection isn't set to UTC postgresql
Python Django
0 vote136 views2 answers
Django APIView Pagination
Python Django