Save the related objects before the actual object being edited on django admin

Question

Is it possible to save the related objects before the actual object being edited on a django admin form?

For example:

in models.py

Answer 1

The following will save the children first:

class ParentAdmin(admin.ModelAdmin):
    inlines = [ChildInline]

    def save_model(self, request, obj, form, change):
        pass # don't actually save the parent instance

    def save_formset(self, request, form, formset, change):
        formset.save() # this will save the children
        form.instance.save() # form.instance is the parent