django-workflow-engine 0.2.2

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Django Workflow Engine

django-workflow-engine is a lightweight and reusable workflow engine for Django applications. It enables you to better organise the business logic for collaborating users.

Installation

pip install django-workflow-engine

Getting started

Add the application to your Django settings INSTALLED_APPS list:

INSTALLED_APPS = [
    ...
    "django_workflow_engine",
]

Add the built-in django-workflow-engine view urls to your project's urls.py as follows:

from django_workflow_engine import workflow_urls
...
urlpatterns = [
    path("workflow/", workflow_urls()),
    ...
]

This will utilise all django-workflow-engine built-in view classes. Default views are:

• list_view=FlowListView List of workflow instances view.
• view=FlowView Workflow instance view.
• create_view=FlowCreateView Create workflow view.
• continue_view=FlowContinueView Workflow continuation view.
• diagram_view=FlowDiagramView Workflow diagram view.

You can override any the built-in view classes with your own, for example to provide your own view classes for flow list and flow view:

urlpatterns = [
        path("workflow/",
             workflow_urls(
                 list_view=MyFlowListView,
                 view=MyFlowView,
            ),
        ),
    ]

Building your first workflow

Create a workflows.py in your project and add your uniquely named workflows.

from django_workflow_engine import Step, Workflow

onboard_contractor = Workflow(
    name="onboard_contractor",
    steps=[
        Step(...),
        Step(...),
        Step(...),
    ],
)

onboard_perm = Workflow(
    name="onboard_perm",
    steps=[
        ...
    ],
)

Add you workflows to your Django settings as follows:

DJANGO_WORKFLOWS = {
    "onboard_contractor": "your_app.workflows.onboard_contractor",
    "onboard_perm": "your_app.workflows.onboard_perm",
}

Each entry needs to be a valid module path where the final component is the name of your workflow class.

Finally, run the django-workflow-engine migrations:

$ ./manage.py migrate