Question: Is there a way to access the parent-topics ID from within a multi_renderer

[Malte]

The scenario is the following:

I wrote a multi_renderer for "Moodle Items" which are aggregated child topics of a "Moodle Section". Now, whenever a user clicks on a "Moodle item" I want to reveal two items, the intermediary "Moodle Section" topic and the clicked "Moodle Item", but in the click handler of the latter I don't know the parents topic id.

I just wonder if this is possible somehow because otherwise I would have to implement a custom renderer for the parent, too.

[Malte]

When inspecting the page_model of my "Moodle Items" I could not find the corresponding parents ("Moodle Section") topic id.

[jri]

You're right, the parent topic ID is not contained in the page model. In the Moodle Item click handler you could request the parent topic from the DB. This would not be expensive as only performed when the user clicks.

What is the selected topic in your scenario? In case it is the Moodle Section you find that topic in page_model.toplevel_object (as well as in dm4c.selected_object).

Should we include the parent topic in the page model? (The parent *type* is available in page_model.assoc_def)

[jri]

Meanwhile JuergeN came up with a scenario that leads to a similar renderer question regarding the parent object (#566).

In a page model I will provide access to the parent page model very soon (#567).

In your Moodle Item's renderer you will then have access to the Moodle Section ID by page_model.parent.object.id.

[jri]

Replying to jri:

In your Moodle Item's renderer you will then have access to the Moodle Section ID by page_model.parent.object.id.

This is now realized (see the hints in #567).

[Malte]

Great, thanks for the progress.

As soon as I can update the moodle-plugin to run on 4.1.13 I will use that new info to enable users to reveal the intermediary-topic right away with their click on a sub-sub-topic.

This way custom_renderers of the "Page Panel" can reveal the complete path (render it on the map) if a user decides to reveal a deeply nested topic (in this case a "Moodle Item" which is a sub-sub-topic of a "Moodle Course").

[jri]

Good!