Skip to main content

Create subject trees in Plone

Project description


This package integrates a subject tree into Plone.


  • Dexterity based content types “Topic Tree” and “Topic” for creating a topic tree (subject tree).

  • The topic-view lists all content referenced the topic.


  • Add ftw.topics to your buildout configuration:

eggs +=
  • Install the default generic import profile.

ITopicSupport for Dexterity

If you would like to have the topics field on dexterity based types, use the ITopicSupportSchema behavior:

<?xml version="1.0"?>
<object name="example.conference.presenter" meta_type="Dexterity FTI"

     <!-- enabled behaviors -->
     <property name="behaviors">
         <element value="ftw.topics.behavior.ITopicSupportSchema" />


plone.restapi support

If necessary install the [restapi] extra.

eggs +=
    ftw.topics [restapi]

List all backreferences on a topic.

GET /plone/topictree/topic?expand=backreferences HTTP/1.1
Accept: application/json

Response - check the expanded section under “backreferences”

HTTP/1.1 200 OK
Content-Type: application/json

    "@components": {
        "actions": {
            "@id": "http://localhost:55001/plone/topictree/topic/@actions"
        "backreferences": {
            "@id": "http://localhost:55001/plone/topictree/topic/@backreferences",
            "items": [
                    "@id": "http://localhost:55001/plone/front-page",
                    "title": "Welcome to Plone"

Customizing reference representations

The ITopicReferencePresentation adapters are responsible for rendering the references on the topic view. The adapters consume all items they know and render them in a section of the view.

ftw.topics includes an ITopicReferencePresentation for rendering content pages and a default adapter for all contents which are not consumed by another adapter.

Adding a custom representation adapter is easy:

from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile
from ftw.topics.browser.representation import DefaultRepresentation
from my.package.interfaces import IMyType
from my.package import _

class MyRepresentation(DefaultRepresentation):
    template = ViewPageTemplateFile('')

    def consume(self, objects):
        for obj in objects:
            if IMyType.providedBy(obj):
                yield obj

    def title(self):
        return _(u'label_my_objects', default=u'My objects')

    def position(self):
        return 50

Be sure that you yield all objects which you do not handle in your adapter. They will be passed up the pipeline until another adapter handles them. The last adapter is usually the default representation adapter, which consumes all left over objects.


Return the title for your section.


The adapters are ordered by position. The default adapter has the position 1000, the ftw.contentpage adapter has the position 100.

Register your adapter with ZCML:

<configure xmlns="">



Be sure you give the adapter a name, so that it does not conflict with other adapters.


2.2.2 (2022-06-20)

  • Fix topics viewlet, if the field has not been initialized. [mathias.leimgruber]

2.2.1 (2022-06-20)

  • Add viewlet, which lists all referenced topics on a content. [mathias.leimgruber]

2.2.0 (2022-05-06)

  • Add restapi support. [mathias.leimgruber]

2.1.1 (2020-09-07)

  • Make collector more robust if there is a non DX object. [mathias.leimgruber]

2.1.0 (2020-01-09)

  • Add uninstall profile. [tinagerber]

  • Add ftw.topics portal_types translations to plone domain. [tinagerber]

2.0.0 (2019-10-18)

1.3.1 (2019-06-13)

  • Exclude expired and future content from the collected backreferences. [elioschmutz]

1.3.0 (2018-07-04)

  • Protect the DX topics field with the write permission. [mbaechtold]

1.2.1 (2016-09-29)

  • Make the topics field optional. [mbaechtold]

1.2.0 (2016-09-26)

  • Add ftw.referencewidget and use it instad of plone.formwidget.contenttree. [tschanzt]

  • Add ftw.theming scss with font awsome icons. [mathias.leimgruber]

  • Fix dexterity behavior and relation collector. [jone]

  • Restrict versions of some dependencies so they don’t pull in Plone 5. [mbaechtold]

  • Also enable navigation behavior on ftw.topic.Topics. [mathias.leimgruber]

1.1.3 (2015-06-15)

  • Fix sorting the subtopics alphabetically. [mathias.leimgruber]

1.1.2 (2014-11-27)

  • Added option to hide backreferences in topics. [lknoefpel]

1.1.1 (2014-02-28)

  • Nothing changed yet.

1.1.0 (2014-02-03)

  • Enable IExcludeFromNavigation behavior on topic tree. [mathias.leimgruber]

1.0 (2013-05-24)

  • Initial implementation.

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

ftw.topics-2.2.2.tar.gz (41.5 kB view hashes)

Uploaded source

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page