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``cascade="all, delete-orphan"`` automatically on a one-to-many
relationship/backref where the foreign key is detected as containing
one or more non-nullable columns. This argument is present in the
keywords passed to :func:`.automap.generate_relationship` in this
case and can still be overridden. Additionally, if the
:class:`.ForeignKeyConstraint` specifies ``ondelete="CASCADE"``
for a non-nullable or ``ondelete="SET NULL"`` for a nullable set
of columns, the argument ``passive_deletes=True`` is also added to the
relationship. Note that not all backends support reflection of
ondelete, but backends that do include Postgresql and MySQL.
fixes #3210
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as that of :ticket:`3199`, when the ``named=True`` parameter
would be used. Some events would fail to register, and others
would not invoke the event arguments correctly, generally in the
case of when an event was "wrapped" for adaption in some other way.
The "named" mechanics have been rearranged to not interfere with
the argument signature expected by internal wrapper functions.
fixes #3197
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setups, where the attempt to check for "duplicate class name" in
declarative would hit upon a not-totally-cleaned-up weak reference
related to some other class being removed; the check here now ensures
the weakref still references an object before calling upon it further.
fixes #3208
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ORM events but also engine events, where the usual logic of
"de duplicating" a redundant call to :func:`.event.listen`
with the same arguments would fail, for those events where the
listener function is wrapped. An assertion would be hit within
registry.py. This assertion has now been integrated into the
deduplication check, with the added bonus of a simpler means
of checking deduplication across the board.
fixes #3199
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method :meth:`.Query.with_statement_hint` to support statement-level
hints that are not specific to a table.
fixes #3206
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kept separate from Postgresql's ON COMMIT for now even though ON COMMIT
is in the SQL standard; the option is still very specific to temp tables
and we eventually would provide a more first class temporary table
feature.
- oracle can apparently do get_temp_table_names() too, so implement that,
fix its get_table_names(), and add it to #3204. fixes #3204 again.
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https://bitbucket.org/jerdfelt/sqlalchemy/branch/sqlite-temp-table-reflection into pr31
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The sqlite get_unique_constraints() implementation did not do a union
against the sqlite_temp_master table like other code does. This could
result in an exception being raised if get_unique_constraints() was
called against a temporary table.
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:meth:`.Inspector.get_temp_view_names`; currently, only the
SQLite dialect supports these methods. The return of temporary
table and view names has been **removed** from SQLite's version
of :meth:`.Inspector.get_table_names` and
:meth:`.Inspector.get_view_names`; other database backends cannot
support this information (such as MySQL), and the scope of operation
is different in that the tables can be local to a session and
typically aren't supported in remote schemas.
fixes #3204
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- repair get_view_names()
- changelog + migration note
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to PGInspect and not in the Dialect. Added tests for PGInspect and removed a bunch of the old test scaffolding.
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removed newline changes.
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feature/postgres-relkind
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work with Microsoft SQL Azure, which changes the word "SQL Server"
to "SQL Azure".
fixes #3151
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- reestablish the "bootstrap" system of loading the test runners
in testing/plugin; using the updated approach we just came up with for
alembic. Coverage should be fixed now when running either py.test or
nose. fixes #3196
- upgrade tox.ini and start using a .coveragerc file
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primaryjoin contained functions, while at the same time remote_side
was specified; the warning would suggest setting "remote side".
It now only emits if remote_side isn't present.
fixes #3194
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thrown off during a collection replace event, if the
reorder_on_append flag were set to True. The fix ensures that the
ordering list only impacts the list that is explicitly associated
with the object.
fixes #3191
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on select(). improve some descriptions and add more info for limit()/
offset(), including new 1.0 functionality.
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unify everything.
- create a new layer of separation between the "from order bys" and "column order bys",
so that an OVER doesn't ORDER BY a label in the same columns clause
- identify another issue with polymorphic for ref #3148, match on label
keys rather than the objects
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and :meth:`.AttributeEvents.dispose_collection`, which track when
a collection is first associated with an instance and when it is
replaced. These handlers supersede the :meth:`.collection.linker`
annotation. The old hook remains supported through an event adapter.
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- prop.compare() isn't needed; replace with prop._with_parent()
for relationships
- update docs in orm/interfaces
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we're now using; rework them fully so that their behavioral contract
is consistent regarding adapter.traverse() vs. adapter.columns[],
add a full suite of tests including advanced wrapping scenarios
previously only covered by test/orm/test_froms.py and
test/orm/inheritance/test_relationships.py
- identify several cases where label._order_by_label_clause would be
corrupted, e.g. due to adaption or annotation separately
- add full tests for #3148
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The "anonymize label" logic is now generalized to ClauseAdapter, and takes
place when the anonymize_labels flag is sent, taking effect for all
.columns lookups as well as within traverse() calls against the label
directly.
- traverse() will also memoize what it gets in columns, so that
calling upon traverse() / .columns against the same Label will
produce the same anonymized label. This is so that AliasedClass
produces the same anonymized label when it is accessed per-column
(e.g. SomeAlias.some_column) as well as when it is applied to a Query,
and within column loader strategies (e.g. query(SomeAlias)); the
former uses traverse() while the latter uses .columns
- AliasedClass now calls onto ColumnAdapter
- Query also makes sure to use that same ColumnAdapter from the AliasedClass
in all cases
- update the logic from 0.9 in #1068 to make use of the same
_label_resolve_dict we use for #2992, simplifying how that works
and adding support for new scenarios that were pretty broken
(see #3148, #3188)
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- replace out _columns_clause_label with a straight boolean flag to
reduce the proliferation of labels
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in :ticket:`2682` disallowed the MySQL dialect from making use of the
"true" and "false" symbols in the context of "IS" / "IS NOT", but
MySQL supports this syntax even though it has no boolean type.
MySQL remains "non native boolean", but the :func:`.true`
and :func:`.false` symbols again produce the
keywords "true" and "false", so that an expression like
``column.is_(true())`` again works on MySQL.
fixes #3186
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pyodbc will no longer specify a default "driver name", and a warning
is emitted if this is missing. The optimal driver name for SQL Server
changes frequently and is per-platform, so hostname based connections
need to specify this. DSN-based connections are preferred.
fixes #3182
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times spent start getting barely different...
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reports a column that isn't found to be present in the table,
a warning is emitted and the column is skipped. This can occur
for some special system column situations as has been observed
with Oracle. fixes #3180
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stringify a _label_reference() as is.
- add .key to _label_reference(), so that when _make_proxy()
is called, we don't call str() on it anyway.
- add a test to exercise Query's behavior of adding all the order_by
expressions to the columns list of the select, assert that things
work out when we have a _label_reference there, that it gets sucked
into the columns list and spit out on the other side, it's referred
to appropriately, etc. _label_reference() could theoretically
be resolved at the point we iterate _raw_columns() but
it's better to just let things work as they already do (except
nicer, since we get "tablename.colname" instead of just "somename"
in the columns list) so that we aren't adding a ton of overhead
to _columns_plus_names in the common case.
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constructs are now importable from the "from sqlalchemy" namespace,
just like every other Core construct.
- The implicit conversion of strings to :func:`.text` constructs
when passed to most builder methods of :func:`.select` as
well as :class:`.Query` now emits a warning with just the
plain string sent. The textual conversion still proceeds normally,
however. The only method that accepts a string without a warning
are the "label reference" methods like order_by(), group_by();
these functions will now at compile time attempt to resolve a single
string argument to a column or label expression present in the
selectable; if none is located, the expression still renders, but
you get the warning again. The rationale here is that the implicit
conversion from string to text is more unexpected than not these days,
and it is better that the user send more direction to the Core / ORM
when passing a raw string as to what direction should be taken.
Core/ORM tutorials have been updated to go more in depth as to how text
is handled.
fixes #2992
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