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| -rw-r--r-- | doc/build/content/mappers.txt | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/build/content/mappers.txt b/doc/build/content/mappers.txt index 70f5a1039..55642fa1e 100644 --- a/doc/build/content/mappers.txt +++ b/doc/build/content/mappers.txt @@ -432,6 +432,8 @@ Single table inheritance is where the attributes of the base class as well as al manager_mapper = mapper(Manager, inherits=employee_mapper, polymorphic_identity='manager') engineer_mapper = mapper(Engineer, inherits=employee_mapper, polymorphic_identity='engineer') +Note that the mappers for the derived classes Manager and Engineer omit the specification of their associated table, as it is inherited from the employee_mapper. Omitting the table specification for derived mappers in single-table inheritance is required. + ##### Concrete Table Inheritance This form of inheritance maps each class to a distinct table, as below: |