[Fixed]-ModelForm field not showing

Because it’s an AutoField. Your can’t set those; they are automatically assigned by the database, hence the name. Therefore there’s no point in showing then on the form.

Try change the return to :

return render(
    request,
    'app/create_bacnet.html',
    {
         'title':'Create BACnetDevice',
         'tag':'create_bacnet',
         'devices': devices
    }
)

render() is the same as a call to render_to_response() with a
context_instance argument that forces the use of a RequestContext.

Render Shortcut