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| author | Mike Bayer <mike_mp@zzzcomputing.com> | 2021-10-23 11:26:45 -0400 |
|---|---|---|
| committer | Mike Bayer <mike_mp@zzzcomputing.com> | 2021-12-29 11:43:53 -0500 |
| commit | 9e3c8d0d71ae0aabe9f5abfae2db838cb80fe320 (patch) | |
| tree | a63c2c87acb3b9ce40cfce839bbf808206af1d98 /lib/sqlalchemy/sql/compiler.py | |
| parent | 3210348fd41d7efb7871afb24ee4e65a1f88f245 (diff) | |
| download | sqlalchemy-9e3c8d0d71ae0aabe9f5abfae2db838cb80fe320.tar.gz | |
replace Variant with direct feature inside of TypeEngine
The :meth:`_sqltypes.TypeEngine.with_variant` method now returns a copy of
the original :class:`_sqltypes.TypeEngine` object, rather than wrapping it
inside the ``Variant`` class, which is effectively removed (the import
symbol remains for backwards compatibility with code that may be testing
for this symbol). While the previous approach maintained in-Python
behaviors, maintaining the original type allows for clearer type checking
and debugging.
Fixes: #6980
Change-Id: I158c7e56306b886b5b82b040205c428a5c4a242c
Diffstat (limited to 'lib/sqlalchemy/sql/compiler.py')
| -rw-r--r-- | lib/sqlalchemy/sql/compiler.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py index a9dd6a23a..90f32a4f7 100644 --- a/lib/sqlalchemy/sql/compiler.py +++ b/lib/sqlalchemy/sql/compiler.py @@ -512,6 +512,11 @@ class TypeCompiler(metaclass=util.EnsureKWArgType): self.dialect = dialect def process(self, type_, **kw): + if ( + type_._variant_mapping + and self.dialect.name in type_._variant_mapping + ): + type_ = type_._variant_mapping[self.dialect.name] return type_._compiler_dispatch(self, **kw) def visit_unsupported_compilation(self, element, err, **kw): |