to initiate events correctly. Previously a collection
could only be assigned to a pending parent instance,
otherwise modified events would not be fired correctly.
Set collection is now compatible with merge(),
fixes [ticket:1352].
cursor.description, which triggers an auto-cursor
close, will be detected so that no results doesn't
fail on recent versions of pysqlite which raise
an error when fetchone() called with no rows present.
needed. Such as, query(A, B).join(A.x).join(B.y)
might say SELECT A.*, B.* FROM A JOIN X, B JOIN Y.
Eager loading can also tack its joins onto those
multiple FROM clauses. [ticket:1337]
State which represents the linkage between a parent and
child object does not support "flushed" status on
one side of the link and not the other, so supporting
this operation leads to misleading results.
[ticket:1315]
sqlalchemy.databases.postgres. [ticket:1327]
- Refection of unknown PG types won't crash when those
types are specified within a domain. [ticket:1327]
- executemany() in conjunction with INSERT..RETURNING is documented as undefined by psycopg2.
- simplified the process of establishment and unestablishment of
class management from a mapper perspective; class manager setup/teardown
is now symmetric (ClassManager would never be fully de-associated previously).
- class manager now unconditionally decorates __init__. this has a slight
behavior change for an unmapped subclass of a mapped superclass, in that
InstanceState creation corresponds to that of the superclass. This
still doesn't allow unmapped subclasses to be usable in mapper
situations, though.
when used in conjunction with __table__, if the column is already
present in __table__. The column will be remapped to the given
key the same way as when added to the mapper() properties dict.
sqlalchemy.orm.attributes. Given an object, attribute name,
and value, will set the value on the object as part of its
"committed" state, i.e. state that is understood to have
been loaded from the database. Helps with the creation of
homegrown collection loaders and such.
- documented public attributes helper functions.
- ORMAdapter filters all replacements against a non-compatible 'parentmapper' annotation
- Other filterings, like
query(A).join(A.bs).filter(B.foo=='bar'), were erroneously
adapting "B.foo" as though it were an "A".
multiple joined-table inheritance entities with common base
classes, previously the adaption applied to "e2" on
"e1 JOIN e2" would be partially applied to "e1". Additionally,
comparisons on relations (i.e. Entity2.related==e2)
were not getting adapted correctly.
will clear any pending backref additions as well, so that
the next access correctly returns only what was present
in the database. Presents some degree of a workaround for
[ticket:1315], although we are considering removing the
flush([objects]) feature altogether.
Mike Bayer