test objects
- added copy_function, compare_function arguments to InstrumentedAttribute
- added MutableType mixin, copy_value/compare_values methods to TypeEngine,
PickleType
- ColumnProperty and DeferredProperty propigate the TypeEngine copy/compare
methods to the attribute instrumentation
- cleanup of UnitOfWork, removed unused methods
- UnitOfWork "dirty" list is calculated across the total collection of persistent
objects when called, no longer has register_dirty.
- attribute system can still report "modified" status fairly quickly, but does
extra work for InstrumentedAttributes that have detected a "mutable" type where
catching the __set__() event is not enough (i.e. PickleTypes)
- attribute tracking modified to be more intelligent about detecting
changes, particularly with mutable types. TypeEngine objects now
take a greater role in defining how to compare two scalar instances,
including the addition of a MutableType mixin which is implemented by
PickleType. unit-of-work now tracks the "dirty" list as an expression
of all persistent objects where the attribute manager detects changes.
The basic issue thats fixed is detecting changes on PickleType
objects, but also generalizes type handling and "modified" object
checking to be more complete and extensible.
the appropriate negation operator if one is available.
- calling a negation on an "IN" or "IS" clause will result in
"NOT IN", "IS NOT" (as opposed to NOT (x IN y)).
and "read", the latter two of which are interpreted only by
Oracle and Mysql [ticket:292]
- added "lockmode" argument to base Query select/get functions,
including "with_lockmode" function to get a Query copy that has
a default locking mode. Will translate "read"/"update"
arguments into a for_update argument on the select side.
[ticket:292]
itself automatically based on if a parent schemaitem has a non-None
setting for the flag, or if not, then whether the identifier name is all lower
case or not. when set to True, quoting is applied to identifiers with mixed or
uppercase identifiers. quoting is also applied automatically in all cases to
identifiers that are known to be reserved words or contain other non-standard
characters. various database dialects can override all of this behavior, but
currently they are all using the default behavior. tested with postgres, mysql,
sqlite. needs more testing with firebird, oracle, ms-sql. part of the ongoing
work with [ticket:155]
so far will convert this to "TIME[STAMP] (WITH|WITHOUT) TIME ZONE",
so that control over timezone presence is more controllable (psycopg2
returns datetimes with tzinfo's if available, which can create confusion
against datetimes that dont).
[ticket:275]
turned on for individual table, schema, and column identifiers when
used in all queries/creates/drops. Enabled via "quote=True" in
Table or Column, as well as "quote_schema=True" in Table. Thanks to
Aaron Spike for his excellent efforts. [ticket:155]
PrimaryKeyConstraint objects (also UniqueConstraint not
completed yet). table creation and reflection modified
to be more oriented towards these new table-level objects.
reflection for sqlite/postgres/mysql supports composite
foreign keys; oracle/mssql/firebird not converted yet.
function in ANSICompiler
MySQLCompiler then skips most CAST calls since it only seems to support the standard syntax for Date
types; other types now a TODO for MySQL
then, polymorphic_union() function now CASTs null()s to the type corresponding to the columns in the UNION,
since postgres doesnt like mixing NULL with integer types
(long road for that .....)
Mike Bayer