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

7 votes173 views2 answers
Dunkleosteus
Python
1 vote176 views2 answers
Save timestamp python
Python
24 votes325 views6 answers
Django update model
Python Django
0 vote142 views1 answer
Set application taskbar icon
Python
265 votes291 views27 answers
Rename column pandas
Python
0 vote145 views1 answer
Django nested inlines
Python
6 votes155 views5 answers
Discord.py get channel object from id
Python
0 vote152 views1 answer
How many handshakes for all the people in your class? python code
Python
0 vote156 views1 answer
Labelencoder update
Python
1 vote160 views1 answer
Each line in a text file into a list in Python
Python