create new parent model in CreateView in django - django

Question

i am new to django and to this site, so apologies if this has been solved before but i haven't found it
So i have 2 django models
ModelA(Model):
ModelB(Model):
modelA = ForeignKey(ModelA, on_delete=models.CASCADE)
A form for the ModelB
ModelBForm(ModelForm):
class Meta:
model=ModelB
exclude=()
and a view
createModelBView(CreateView):
model = ModelB
form_class = ModelBForm
the template only does
{{form}}
When rendered, there is a dropdown list for the ModelA field so I can choose from existing instances of the ModelA, but what if a new one needs to be created? In the admin there is an option next to edit or create a new ModelA in a popup. Is there an option to do this with CreateView?
Thanks

Answer 1

There is no built-in functionality like that.
However you can build it easily yourself.
You will have to add a link (or a HTML form) in your template which points to the URL corresponding to the view you implemented to create the given model.
Following is a very abstract example.
In your template:
<form>
{{csrf_token}}
{{ form }}
Create model A if you want
<input type="submit" value="Submit">
<\form>
In your urls.py
url(r'^models/createA/$', views.CreateModelAView.as_view(), name="optional")
In your views.py
createModelAView(CreateView):
model = ModelA
form_class = ModelAForm
Then you'll need to create a form called ModelAForm.
On a different note, I'd suggest to start off with functional views if you're new to Django. It is more coding but you get a better feel of what's going on

Answer 2

In the admin there is an option next to edit or create a new ModelA in a popup. Is there an option to do this with CreateView?
No, not built in. That functionality in the admin involves a lot of front-end work involving templates and routing that would have to come from somewhere; since a Form/ModelForm instance can't assume it has access to the admin (which is a contrib module, may not be enabled, and is permission-sensitive), the infrastructure required for that can't be assumed to be available in the general case.
Keep in mind that {{ form }} doesn't even render <form> tags or any kind of submit element. It's intended to be a very, very basic way to render a very, very basic set of fields, while the admin is built specifically to be a (reasonably) powerful, flexible way to put a UI in front of your models.
You could certainly build that functionality yourself, or find a reusable app that does the same thing, but there is no facility distributed with Django to generate it automatically.