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| author | Mike Bayer <mike_mp@zzzcomputing.com> | 2015-09-16 18:46:53 -0400 |
|---|---|---|
| committer | Mike Bayer <mike_mp@zzzcomputing.com> | 2015-09-16 18:46:53 -0400 |
| commit | 24a7241b5ef63f8e82c007d89f5c179d9596bf10 (patch) | |
| tree | 00238ad56de2b15ac11df8e333de1e98e5386cab /lib/sqlalchemy/sql/expression.py | |
| parent | 7eb34baf99179eec966ddd8b3607a6d8cfdfba21 (diff) | |
| download | sqlalchemy-24a7241b5ef63f8e82c007d89f5c179d9596bf10.tar.gz | |
- The :func:`.type_coerce` construct is now a fully fledged Core
expression element which is late-evaluated at compile time. Previously,
the function was only a conversion function which would handle different
expression inputs by returning either a :class:`.Label` of a column-oriented
expression or a copy of a given :class:`.BindParameter` object,
which in particular prevented the operation from being logically
maintained when an ORM-level expression transformation would convert
a column to a bound parameter (e.g. for lazy loading).
fixes #3531
Diffstat (limited to 'lib/sqlalchemy/sql/expression.py')
| -rw-r--r-- | lib/sqlalchemy/sql/expression.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py index 79d25a39e..27fae8ca4 100644 --- a/lib/sqlalchemy/sql/expression.py +++ b/lib/sqlalchemy/sql/expression.py @@ -36,7 +36,7 @@ from .elements import ClauseElement, ColumnElement,\ True_, False_, BinaryExpression, Tuple, TypeClause, Extract, \ Grouping, WithinGroup, not_, \ collate, literal_column, between,\ - literal, outparam, type_coerce, ClauseList, FunctionFilter + literal, outparam, TypeCoerce, ClauseList, FunctionFilter from .elements import SavepointClause, RollbackToSavepointClause, \ ReleaseSavepointClause @@ -92,6 +92,7 @@ asc = public_factory(UnaryExpression._create_asc, ".expression.asc") desc = public_factory(UnaryExpression._create_desc, ".expression.desc") distinct = public_factory( UnaryExpression._create_distinct, ".expression.distinct") +type_coerce = public_factory(TypeCoerce, ".expression.type_coerce") true = public_factory(True_._instance, ".expression.true") false = public_factory(False_._instance, ".expression.false") null = public_factory(Null._instance, ".expression.null") |