admin.py 文件源码

def change_view(self, request, object_id, form_url='', extra_context=None):
        """
        Override this function to hide the sumbit row from the user who has
        view only permission
        """
        to_field = request.POST.get(
            TO_FIELD_VAR, request.GET.get(TO_FIELD_VAR)
        )
        model = self.model
        opts = model._meta

        # TODO: Overriding the change_view costs 1 query more (one from us
        # and another from the super)
        obj = self.get_object(request, unquote(object_id), to_field)

        if self.has_view_permission(request, obj) and \
                not self._has_change_only_permission(request, obj):
            extra_context = extra_context or {}
            extra_context['title'] = _('View %s') % force_text(
                opts.verbose_name)

            extra_context['show_save'] = False
            extra_context['show_save_and_continue'] = False
            extra_context['show_save_and_add_another'] = False
            extra_context['show_save_as_new'] = False

            inlines = self.get_inline_instances(request, obj)
            for inline in inlines:
                if (inline._has_change_only_permission(request, obj) or
                        inline.has_add_permission(request)):
                    extra_context['show_save'] = True
                    extra_context['show_save_and_continue'] = True
                    break

        return super(AdminViewPermissionModelAdmin, self).change_view(
            request, object_id, form_url, extra_context)