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

2 votes279 views2 answers
Django queryset is in list
Python Django
0 vote234 views1 answer
Pass context data with templateview in django
Python Django
0 vote230 views1 answer
Custom django password checker
Python Django
3 votes268 views3 answers
Django.db.utils.OperationalError: no such table:
Python Django
0 vote239 views1 answer
Django-filter field name greater than
Python Django
0 vote235 views1 answer
Django save object in view
Python Django
0 vote244 views1 answer
?: (admin.W411) 'django.template.context_processors.request' must be enabled in DjangoTemplates (TEMPLATES) in order to use the admin navigation sidebar.
Python Django
0 vote225 views1 answer
Change date format on django templates
Python Django
1 vote230 views1 answer
Django jinja subset string
Python Django
1 vote240 views1 answer
Object.image.url email template django
Python Django