The bug existed since sliced query union was added but was elevated to
query union slices by moving the .exists() optimization to the compiler
in 3d734c09ff.
Thanks Stefan Hammer for the report.
Columns of the left outer most select statement in a combined query
can be referenced by alias just like by index.
This removes combined query ordering by column index and avoids an
unnecessary usage of RawSQL which causes issues for backends that
specialize the treatment of null ordering.
This makes QuerySet.order_by() no longer ignore trailing transforms for
models with Meta.ordering. As a consequence, FieldError is raised in
such cases for non-existent fields.
Thanks to Klaas van Schelven for the report and Mariusz Felisiak for the
review and advice.
Node.create() which has a compatible signature with Node.__init__()
takes in a single `children` argument rather than relying in unpacking
*args in Q.__init__() which calls Node.__init__().
In addition, we were often needing to unpack iterables into *args and
can instead pass a list direct to Node.create().
Thanks Splunk team: Preston Elder, Jacob Davis, Jacob Moore,
Matt Hanson, David Briggs, and a security researcher: Danylo Dmytriiev
(DDV_UA) for the report.
The lack of _for_write = True assignment in bulk_update prior to
accessing self.db resulted in the db_for_read database being used to
wrap batched UPDATEs in a transaction.
Also tweaked the batch queryset creation to also ensure they are
executed against the same database as the opened transaction under all
circumstances.
Refs #23646, #33501.
In these cases Black produces unexpected results, e.g.
def make_random_password(
self,
length=10,
allowed_chars='abcdefghjkmnpqrstuvwxyz' 'ABCDEFGHJKLMNPQRSTUVWXYZ' '23456789',
):
or
cursor.execute("""
SELECT ...
""",
[table name],
)
This reverts commit e441847eca.
A shallow copy is not enough because querysets can be reused and
evaluated in nested nodes, which shouldn't mutate JOIN aliases.
Thanks Michal Čihař for the report.
Address a long standing bug in a Where.add optimization to discard
equal nodes that was surfaced by implementing equality for Lookup
instances in bbf141bcdc.
Thanks Shaheed Haque for the report.
Subquery deconstruction support required implementing complex and
expensive equality rules for sql.Query objects for little benefit as
the latter cannot themselves be made deconstructible to their reference
to model classes.
Making Expression @deconstructible and not BaseExpression allows
interested parties to conform to the "expression" API even if they are
not deconstructible as it's only a requirement for expressions allowed
in Model fields and meta options (e.g. constraints, indexes).
Thanks Phillip Cutter for the report.
This also fixes a performance regression in bbf141bcdc.
