this is the default mapper to map the default models to the default tables
You can use your also use your own mappers. See the docs.
Functions
| backref(name, **kwargs) | Create a back reference with explicit arguments, which are the same arguments one can send to relationship(). |
| mapper(class_, *args, **params[, local_table]) | Return a new Mapper object. |
| relationship(argument, **kwargs[, secondary]) | Provide a relationship of a primary Mapper to a secondary Mapper. |
| setup() | setups the mapping |
| synonym(name[, map_column, descriptor, ...]) | Set up name as a synonym to another mapped property. |