[Answer]-How to implement this type of model inheritance and how to link a table to any other table in django

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Django has the contenttypes framework so you can name concrete events as you wish:

class EventType(models.Model):
    name = models.CharField(max_length=200)
    has_additional_fields = models.BooleanField(default=True)
    content_type = models.ForeignKey(ContentType)

class Event(models.Model):
    data = models.TextField(null=True)
    event_type = models.ForeignKey(EventType)

    def get_real_model(self):
        return self.event_type.content_type.model_class()

    def get_concrete_event(self):
        return self.event_type.content_type.get_object_for_this_type(pk=self.pk)

class ProjectEvent(Event):
    group = models.CharField(max_length=200)

class MeetingEvent(Event):
    topic = models.CharField(max_length=200)

class NormalEvent(Event):
    pass

Get a list of all events:

Event.objects.all()

Get a list of projects:

ProjectEvent.objects.all()

Get the concrete (“unknown”) event by id:

Event.objects.get(pk=id).get_concrete_event()

Get the real model of the event by id:

Event.objects.get(pk=id).get_real_model()

Get the form to edit concrete event:

from django.forms.models import modelform_factory

event = Event.objects.get(pk=id)
EventForm = modelform_factory(event.get_real_model())
form = EventForm(instance=event.get_concrete_event())

Get the same form then you know event type:

ProjectEventForm = modelform_factory(ProjectEvent)
form = ProjectEventForm(instance=ProjectEvent.objects.get(pk=id))
👤catavaran

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