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Integration of django-fsm into viewflow

Major Changes

• The django-fsm package has now been fully integrated into viewflow as the viewflow.fsm package starting from version 3.0.

Deprecation Notice

• Attention: The standalone version of django-fsm will no longer be maintained nor receive any further updates. This transition marks a significant milestone in our efforts to streamline development workflows and enhance functionality.

Action Required

• Users requiring the new functionalities introduced in django-fsm version 3.0 or later are strongly encouraged to migrate to viewflow.fsm.
• To facilitate a smooth transition, detailed instructions on the migration process, as well as information on accessing new features, have been provided.

Resources

• Migration Guide & Documentation: For comprehensive guidelines and further details on the migration process, please visit our official documentation at https://docs.viewflow.io/fsm/index.html.

• Update pypi classifiers to latest django/python supported versions
• Several fixes for graph_transition command

• graph_transition command fix for django 1.10
• graph_transition command supports GET_STATE targets
• signal data extended with method args/kwargs and field
• sets allowed to be passed to the transition decorator

• Support for class substitution to proxy classes depending on the state
• Added ConcurrentTransitionMixin with optimistic locking support
• Default db_index=True for FSMIntegerField removed
• Graph transition code migrated to new graphviz library with python 3 support
• Ability to change state on transition exception