django - In Wagtail, how can I add a form to the bottom of another model's form in the WagtailAdmin, for a OneToOneField relationship? -

in wagtail, let's have page this:

class mypage(page):     field_1 = richtextfield()     field_2 = models.datefield()      content_panels = page.content_panels + [         fieldpanel('field_1'),         fieldpanel('field_2'),     ] 

and have model has one-to-one relationship first model:

class pagesettings(models.model):     page = models.onetoonefield(mypage)     extra_setting_1 = models.booleanfield()     extra_setting_2 = models.charfield(max_length=50) 

how can add form pagesettings model bottom of wagtail admin form mypage model?

bonus points way generic relationships.

class mypage(page):     field_1 = richtextfield()     field_2 = models.datefield()      content_panels = page.content_panels + [         fieldpanel('field_1'),         fieldpanel('field_2'),         inlinepanel('settings', label='settings', min_num=1, max_num=1),     ]      class pagesettings(models.model):     page = parentkey(mypage, related_name='settings')     extra_setting_1 = models.booleanfield()     extra_setting_2 = models.charfield(max_length=50)