Add new action in changelist in Django

Django ship a default action “Delete selected <objects>”, how can we add a new action? It is easy to do that. All you need to do are in admin.py where the model admins are registered.

First write your action handler function like this

def tasks_finished( modeladmin, request, queryset ):
    queryset.update( finished = True )
tasks_finished.short_description = "Mark these tasks as finished"

Then register the handler in your model admin site

class TaskAdmin( admin.ModelAdmin ):
    list_display = [ "project", "title", "user", "works", "time", "finished" ]
    list_filter = [ "finished", "user", "project" ]
    inlines = [ WorkAdminInline ]
    ordering = [ "project", "finished", "user", "title" ]
    actions = [ tasks_finished ]

That is all you need to do.