Inlineformset with multiple models of the same type?

I'm trying to make a page that allows a user to edit/add many models at once. Let me give an example:

class SolarSystem(models.Model):        name = models.CharField(...)        description = models.CharField(...)    class Planet(models.Model):        name = models.CharField(...)        solarsystem = models.ForeignKey(SolarSystem)

I want the edit page to be something like:

SolarSystem 1
   |  -- Planet a form
   |  -- Planet b form
   |  -- Add new planet?

SolarSystem 2
   |  -- Planet c form
   |  -- Planet d form
   |  -- Planet e form
   |  -- Add new planet?

SolarSystem 3
   |  -- Planet f form
   |  -- Add new planet?

That is, it lists out the solar systems and allows the user to add new planets or edit an existing planet in a given solarsystem. In this example, SolarSystem 1
has planets a,b. The user can edit planet a,b. The user can also add a new planet to this solar system (Planet x, for example).

In my views, I can do something like:


def displayform(request):       PlanetFormSet = inlineformset_factory(SolarSystem, Planet, extra=1)         formset = PlanetFormSet(queryset=SolarSystem.objects.all())         return render_to_response(... {"formset":formset}, ...)

But I don't quite understand how the template should be written. The logic should be something like:

<form>
{% for solarsystem in solarsystems: %}
     <span> Edit this solar system: {{ solarsystem.name }} </span>
     {% for planetform in formset: %}
           {{ form }}
</form>

The problem with that is how do I get solarsystem name from the formset and then group the planet's forms based on that solarsystem? How would Django know which
planetform goes with which solarsystem when I do a form post? 

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