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 vote416 views1 answer
Aggregation with f() in django rest api
Python Django
-1 vote380 views1 answer
Class views django slug
Python Django
1 vote369 views1 answer
Elif in django template
Python Django
3 votes366 views6 answers
ImportError: Couldn't import Django. Are you sure it's installed and available on your PYTHONPATH environment variable? Did you forget to activate a virtual environment?
Python Django
2 votes367 views1 answer
Pass in queryset as filter django
Python Django
0 vote300 views1 answer
Django active link
Python Django
3 votes320 views1 answer
Autoslugfield django 3
Python Django
1 vote365 views3 answers
Value list in django
Python Django
1 vote354 views2 answers
Django content type
Python Django
54 votes489 views2 answers
How to run django requirement.txt
Python Django