diff options
Diffstat (limited to 'lib/sqlalchemy/orm/mapper.py')
| -rw-r--r-- | lib/sqlalchemy/orm/mapper.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/mapper.py b/lib/sqlalchemy/orm/mapper.py index eaade21ec..2ab239f86 100644 --- a/lib/sqlalchemy/orm/mapper.py +++ b/lib/sqlalchemy/orm/mapper.py @@ -426,6 +426,12 @@ class Mapper(InspectionAttr): thus persisting the value to the ``discriminator`` column in the database. + .. warning:: + + Currently, **only one discriminator column may be set**, typically + on the base-most class in the hierarchy. "Cascading" polymorphic + columns are not yet supported. + .. seealso:: :ref:`inheritance_toplevel` |