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

12 votes107 views3 answers
Convert pandas dataframe to dict with a column as key
Python
0 vote109 views1 answer
Pandas dataframe from tsv
Python
0 vote99 views1 answer
List tuple dictionary,
Python
1 vote102 views1 answer
Pprint(ASingleReview) TypeError: 'module' object is not callable
Python
1 vote109 views1 answer
Bytes-like object
Python
1 vote114 views1 answer
Two elements at a time in list comprehension
Python
0 vote129 views1 answer
How to get a mock image in django?
Python Django
4 votes100 views4 answers
Virtualenv python2
Python
0 vote106 views1 answer
Form list of filename get the filename with highest num pythn
Python
1 vote110 views1 answer
Olst = [] a = int(input()) b = int(input()) for ele in range(a,b+1): if ele%2 != 0: olst.append(ele) print(olst[::-1])
Python