Django-cms plugin mptt filtering by node to display new subtree, based on config -

i trying implement plugin django-cms shows tree of of links. want filter tree based on config user chooses in cms. based on node chooses in config want able display sub-tree.

here models.py

from django.db import models mptt.models import mpttmodel, treeforeignkey cms.models.pluginmodel import cmsplugin  class section(mpttmodel):     name = models.charfield(max_length=25, unique=true)     parent = treeforeignkey('self', null=true, blank=true, related_name='children', db_index=true)      class mpttmeta:         order_insertion_by = ['name']      def __str__(self):         return self.name   class sectionconfig(cmsplugin):     root_shown = models.foreignkey("section")     title = models.charfield(default="usefull links", max_length=25) 

here cms_plugins.py:

from cms.plugin_base import cmspluginbase cms.plugin_pool import plugin_pool cms.models.pluginmodel import cmsplugin django.utils.translation import ugettext_lazy _ links_plugin.models import section, sectionconfig  class linksplugin(cmspluginbase):     name = _("links tree plugin")     model = sectionconfig     render_template = "links.html"     cache = false      def render(self, context, instance, placeholder):         context['instance'] = instance         context['nodes'] = section.objects.all()         return context  plugin_pool.register_plugin(linksplugin) 

and here templates/links.html

<div class='container-fluid'>     <h1>liens utiles</h1>     {% load mptt_tags %}     <ul class="root">         {% recursetree nodes %}             <li>                 {{ node.name }}                 {% if not node.is_leaf_node %}                     <ul class="children">                         {{ children }}                     </ul>                 {% endif %}             </li>         {% endrecursetree %}     </ul> </div> 

so issue giving right set of nodes context. in cms_plugins.py id change

context['nodes'] = section.objects.all() 

to filter build subtree based on

root_shown = models.foreignkey("section") 

the problem don't know how use fk reference section object , find new root section. thought use get_descendants(include_self=true) rebuild new sub-tree , display list of nodes. wrong? how reference desired node?

if possible eli5

you'll want this:

contect['nodes'] = instance.root_shown.get_descendants(include_self=true)