PostgreSQL specific database functions — Django documentation
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Django/docs/3.0.x/ref/contrib/postgres/functions
PostgreSQL specific database functions
All of these functions are available from the django.contrib.postgres.functions
module.
RandomUUID
- class RandomUUID
Returns a version 4 UUID.
The pgcrypto extension must be installed. You can use the CryptoExtension migration operation to install it.
Usage example:
>>> from django.contrib.postgres.functions import RandomUUID
>>> Article.objects.update(uuid=RandomUUID())
TransactionNow
- class TransactionNow
Returns the date and time on the database server that the current transaction started. If you are not in a transaction it will return the date and time of the current statement. This is a complement to django.db.models.functions.Now, which returns the date and time of the current statement.
Note that only the outermost call to atomic() sets up a transaction and thus sets the time that TransactionNow()
will return; nested calls create savepoints which do not affect the transaction time.
Usage example:
>>> from django.contrib.postgres.functions import TransactionNow
>>> Article.objects.filter(published__lte=TransactionNow())
<QuerySet [<Article: How to Django>]>