how to use two are more model query in a single function

[arvind yadav]

class MyObjectAdmin(admin.ModelAdmin):

# A template for a very customized change view:
change_form_template = 'admin/my_change_form.html'

def get_dynamic_info(self):
    # ...
    pass

def change_view(self, request, object_id, form_url='', extra_context=None):
    extra_context = extra_context or {}
    extra_context['osm_data'] = self.get_dynamic_info()
    return super(MyObjectAdmin, self).change_view(
        request, object_id, form_url, extra_context=extra_context,
    )