that the given argument is a FromClause,
or Text/Select/Union, respectively.
- Query.add_column() can accept FromClause objects
in the same manner as session.query() can.
- Fixed PendingDeprecationWarning involving order_by
parameter on relation(). [ticket:1226]
- Unit tests still filter pending deprecation warnings but have a commented-out
line to temporarily disable this behavior. Tests need to be fully converted
before we can turn this on.
thing" in a wider variety of cases. It can now
count multiple-entity queries, as well as
column-based queries. Note that this means if you
say query(A, B).count() without any joining
criterion, it's going to count the cartesian
product of A*B. Any query which is against
column-based entities will automatically issue
"SELECT count(1) FROM (SELECT...)" so that the
real rowcount is returned, meaning a query such as
query(func.count(A.name)).count() will return a value of
one, since that query would return one row.
of ClassManager, and made it a private method on
_ClassInstrumentationAdapter. ClassManager's approach
handles the default task with fewer function calls which chops off
a few hundred calls from the pertinent profile tests.
multiple aliases of the same class (will add tests in
[ticket:1218])
- Added a new extension sqlalchemy.ext.serializer. Provides
Serializer/Deserializer "classes" which mirror Pickle/Unpickle,
as well as dumps() and loads(). This serializer implements
an "external object" pickler which keeps key context-sensitive
objects, including engines, sessions, metadata, Tables/Columns,
and mappers, outside of the pickle stream, and can later
restore the pickle using any engine/metadata/session provider.
This is used not for pickling regular object instances, which are
pickleable without any special logic, but for pickling expression
objects and full Query objects, such that all mapper/engine/session
dependencies can be restored at unpickle time.
Pass in the argument "label_length=<value>" to create_engine()
to adjust how many characters max will be present in dynamically
generated column labels, i.e. "somecolumn AS somelabel". Any
value less than 6 will result in a label of minimal size,
consiting of an underscore and a numeric counter.
The compiler uses the value of dialect.max_identifier_length
as a default. [ticket:1211]
- removed ANON_NAME regular expression, using string patterns now
- _generated_label() unicode subclass is used to indicate generated names
which are subject to truncation
accurately adapt the expressions generated, which helps
particularly with self-referential comparisons. [ticket:1171]
- Fixed bug involving primaryjoin/secondaryjoin conditions
constructed from class-bound attributes (as often occurs
when using declarative), which later would be inappropriately
aliased by Query, particularly with the various EXISTS
based comparators.
Mike Bayer