Description

We introduced a fix in #38084 to synchronize DiscussionsConfiguration.enabled (DB) with tab.is_hidden (modulestore) during course imports. While this resolves the issue for newly imported courses, existing courses that are currently out of sync still need to be updated so that course authors see the correct values.

This PR adds a data migration that reads each course's discussion tab from CourseOverviewTab (a DB-level cache of modulestore tabs) and updates both DiscussionsConfiguration.enabled and CourseAppStatus.enabled to match (enabled = NOT is_hidden). Only out-of-sync rows are updated. The migration uses CourseOverviewTab instead of the modulestore directly to avoid performance issues at scale.

Useful information to include:

• Which edX user roles will this change impact? Course Author"
• Include screenshots for changes to the UI (ideally, both "before" and "after" screenshots, if applicable).
• Provide links to the description of corresponding configuration changes. Remember to correctly annotate these
  changes.

Supporting information

#38084 (comment)

Testing instructions

1. Rollback 0019 if already applied:

python manage.py migrate discussions 0018

2. Create unsynced data in the shell:

from openedx.core.djangoapps.content.course_overviews.models import CourseOverview, CourseOverviewTab
from openedx.core.djangoapps.discussions.models import DiscussionsConfiguration
from openedx.core.djangoapps.course_apps.models import CourseAppStatus
from opaque_keys.edx.keys import CourseKey

course_key = CourseKey.from_string("course-v1:U0X12+CS11013+UAI_22")

overview, _ = CourseOverview.objects.get_or_create(id=course_key, defaults={"version": 1})

tab, _ = CourseOverviewTab.objects.update_or_create(
    course_overview=overview,
    tab_id="discussion",
    defaults={"is_hidden": True},
)

config, _ = DiscussionsConfiguration.objects.update_or_create(
    context_key=course_key,
    defaults={"enabled": True},
)

app_status, _ = CourseAppStatus.objects.update_or_create(
    course_key=course_key,
    app_id="discussion",
    defaults={"enabled": True},
)

# Verify the desync
print(f"Tab is_hidden: {tab.is_hidden}")            # True
print(f"Config enabled: {config.enabled}")           # True  (should be False)
print(f"AppStatus enabled: {app_status.enabled}")    # True  (should be False)

3. Visit the Pages and Resources page in the authoring MFE and verify that the discussion configuration is unsynced

4. Run the migration:

python manage.py migrate discussions 0019

5. Verify the fix:

from openedx.core.djangoapps.discussions.models import DiscussionsConfiguration
from opaque_keys.edx.keys import CourseKey

6. Repeat step 3 and verify that the configuration is now synced

config = DiscussionsConfiguration.objects.get(context_key=CourseKey.from_string("course-v1:TestOrg+Test101+2026"))
print(f"Config enabled: {config.enabled}")  # Should now be False

Deadline

"None"

Other information

Include anything else that will help reviewers and consumers understand the change.

• Does this change depend on other changes elsewhere?
• Any special concerns or limitations? For example: deprecations, migrations, security, or accessibility.
• If your database migration can't be rolled back easily.