[FIXED] Django - How do I recreate or import the django admin green plus sign for adding new related instances?

Issue

For example I have a model like this:

class Wheel(models.Model):
    wheel = models.CharField(max_length=20)

class Vehicle(models.Model):
    wheel = models.ForeignKey(Wheel)

When I make a new Vehicle, I want the green plus sign to appear beside my wheel field and allow me to add new instances of Wheel. I'm quite new to django so I don't know if it's possible. Any help is appreciated!

Solution

Check the widget django.contrib.admin.widgets.RelatedFieldWidgetWrapper. It's the widget used by Django Admin to add the functional '+' mark, here.
In order to use the widget in your custom form, you need to provide the admin_site argument that serves the adding page of the Wheel.

Answered By - okm