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.. rubric:: Foreign key constraints support
* Set ``PRAGMA foreign_keys=ON`` on opening of connect to SQLite. Only SQLite(>=3.6.19) supports foreign key constraints. So in lower versions, this does not effect.
.. rubric:: Exceptions
* :exc:`MultipleObjectsReturned` for :meth:`Model.get()` when it does not return the single object.
* :exc:`NotUniqueForeignKey` for Many-To-One relationships related with multiple parents.
.. rubric:: Constant name
* :attr:`Field.TYPENAMES` -> :attr:`Field.TYPE_NAMES`