I have several Django apps within a single project. What I am running into is that I often tend to add the same object(s) to the render call that renders a particular screen.

In this example below, I have a view that displays a form with a dropdown of categories that you can choose from. Now I need to add these categories every time I display the create.html page. This is simplified, but imagine I have 6 more views that could potentially show the create.html page, all of them have to remember to add the categories array.

    def createmeeting(request):
        if request.method == "POST":

            categories = MeetingCategory.objects.all()

            // Some error checking, omitted for this example
            error_msg = "invalid content"

            if error_msg:
                return render(request, "meetings/create.html",
                    {
                        "categories":               categories,
                        "error_msg":                error_msg,
                     })
            else:
                // Create the meeting here, omitted for this example
                return redirect("/meetings/profile/")
        else:
            categories = MeetingCategory.objects.all()
            return render(request, "meetings/create.html",
                {
                    "categories": categories
                })

Is there a better way of handling cases like this?