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Diffstat (limited to 'lib/sqlalchemy/ext/compiler.py')
| -rw-r--r-- | lib/sqlalchemy/ext/compiler.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/sqlalchemy/ext/compiler.py b/lib/sqlalchemy/ext/compiler.py index cb126c374..daa9e1551 100644 --- a/lib/sqlalchemy/ext/compiler.py +++ b/lib/sqlalchemy/ext/compiler.py @@ -367,6 +367,7 @@ Example usage:: ) """ +from sqlalchemy import exc def compiles(class_, *specs): def decorate(fn): @@ -399,6 +400,11 @@ class _dispatcher(object): # TODO: yes, this could also switch off of DBAPI in use. fn = self.specs.get(compiler.dialect.name, None) if not fn: - fn = self.specs['default'] + try: + fn = self.specs['default'] + except KeyError: + raise exc.CompileError( + "%s construct has no default " + "compilation handler." % type(element)) return fn(element, compiler, **kw) |