Django model form with selected rows

Question

Hi All,

I have a django model roughly as shown below:

class Event(db.Model):
   creator = db.ReferenceProperty(User, required= True)
   title = db.TextProperty(required = True)
   description = db.TextProperty(required = True)

class Ticket(db.Model):
   user = db.ReferenceProperty(User, required = True)
   event = db.ReferenceProperty(Event, required = True)
   total_seats = db.IntegerProperty(required = True,default=0)
   available_seats = db.IntegerProperty(required = True,default=0)

Now I want to create a form from this model which should contain the events which are own by the logged in users only. Currently it shows a drop down with all the events in it.

Is it possible with django forms? I am working on google app engine.

Please suggest.

Answer 1

This is how I'd go about it if this were a pure Django application (rather than app engine). You may perhaps find it useful.

The key is to override the __init__() method of your ModelForm class to supply the currently logged in user instance.

# forms.py
class TicketForm(forms.ModelForm):
    def __init__(self, current_user, *args, **kwargs):
        super(TicketForm, self).__init__(*args, **kwargs)
        self.fields['event'].queryset = Event.objects.filter(creator = 
             current_user)

You can then supply the user instance while creating an instance of the form.

ticket_form = TicketForm(request.user)