I’m managing a LearnDash LMS on a WordPress site. For each new lesson, one of the teachers would publish a video (for exemple, on Youtube or Vimeo). I would then manually take the embed link for this video, create a dedicated lesson in an existing course, and put it in the content for students to watch.

Lately, I’ve been working on automating this process through Zapier.
I had to use LearnDash API v2, and everything was working as expected except that the created lesson won’t be “linked” to a course, even though I clearly specify the course id in the request.

Here’s what the call looks like:

The POST request is made to this endpoint
<website>/wp-json/ldlms/v2/sfwd-lessons

The headers are as follows (authentication headers are indeed excluded):

Content-Type: application/json
Cache-Control: no-cache, no-store, must-revalidate
Pragma: no-cache
Expires: 0

The body:

{
  "title": "Course title",
  "content": "Embed link",
  "course": Course-ID,
  "status": "publish", 
  "menu_order": 1
}

Each of these attributes is taken into account except “course”.

• I also tried the exact same request through Postman, with the exact same results.
• Everytime, in the response body, it is shown "course": 0.
• I’ve tried with several Course-IDs, hard-coded or not, but I still can’t figure out why it doesn’t work or if I’ve missed an important step to make the lesson linkable somehow.
• The only way to date to link a lesson I create through this API is to do it manually through the LMS Dashboard, which is a pity compared to the original aim.

Many thanks to the kind souls who will pass by to help me with this issue.