can load immediately via second select or via deferred columns.
needs work to reduce complexity and possibly to improve upon unnecessary work
performed by ColumnLoader objects hitting lots of non-existent columns
- would like to add post_exec() step to MapperProperty...but need to devise some way
such that MapperProperty instances can register themselves in the SelectContext as
requiring post_exec....otherwise we add huge method call overhead (and there is too
much already)
- fix to deferred loading so that the attributes loaded by "group" deferred loading
get proper CommittedState
- some refactoring to attributes to support setting attributes as committed
will add the given mapper/class or ColumnElement to the query at compile
time, and apply them to the instances method. the user is responsible
for constructing reasonable join conditions (otherwise you can get
full cartesian products). result set is the list of tuples, non-uniqued.
- fixed multi-mapper instances() to pad out shorter results with None so
zip() gets everything
that the class of object attached to a parent object is appropriate
(i.e. if A.items stores B objects, raise an error if a C is appended to A.items)
- new extension sqlalchemy.ext.associationproxy, provides transparent "association object"
mappings. new example examples/association/proxied_association.py illustrates.
- some example cleanup
- fixed table comparison example in metadata.txt
- docstrings all over the place
- renamed mapper _getattrbycolumn/_setattrbycolumn to get_attr_by_column,set_attr_by_column
- removed frommapper parameter from populate_instance(). the two operations can be performed separately
- fix to examples/adjacencytree/byroot_tree.py to fire off lazy loaders upon load, to reduce query calling
- added get(), get_by(), load() to MapperExtension
- re-implemented ExtensionOption (called by extension() function)
- redid _ExtensionCarrier to function dynamically based on __getattribute__
- added logging to attributes package, indicating the execution of a lazy callable
- going to close [ticket:329]
SelectionContext object to track state during the operation.
SLIGHT API BREAKAGE: the append_result() and populate_instances()
methods on MapperExtension have a slightly different method signature
now as a result of the change; hoping that these methods are not
in widespread use as of yet.
part of a "delete-orphan" cascade, for certain conditions where the
parent isnt available to cascade from.
- it is now invalid to declare a self-referential relationship with
"delete-orphan" (as the abovementioned check would make them impossible
to save)
- improved the check for objects being part of a session when the
unit of work seeks to flush() them as part of a relationship..
inheritance. relations now create priamry/secondary joins against that lead table. if you want to create it against
an inherited table, use explicit join conditions.
added 'correlate' argument to CompoundSelect to get polymorph example working again.
fixes to relation to enable it to locate "direction" more consistently with inheritance relationships
more tweaks to parenthesizing subqueries, unions, etc.
Mike Bayer