feat: soft delete

[chintanjoshi-apphelix-2u]

Description

Implements soft delete functionality for discussion threads, responses, and comments using the is_deleted flag instead of permanently deleting records.
This enables safe deletion and restoration of discussion content while preserving existing data.

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Changes Made

• Added soft delete and restore functionality for threads, responses, and comments.
• Introduced support to view deleted content in the Learner tab using a new Active / Deleted filter.
• Implemented restore actions for deleted threads, responses, and comments.
• Added deleted count tracking and support for sorting by deleted count in the Learner tab.
• Implemented bulk delete and bulk restore actions for discussion content.
• Ensured nested responses and comments are handled correctly during delete and restore operations.
• Added API support to fetch deleted content for moderation workflows.

Note:
Features listed above (except soft delete itself) are available only to Staff, Admins, Moderators, and TAs.

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JIRA Tickets

• COSMO2-742 – Link
• COSMO2-769 – Link
• COSMO2-783 – Link

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Related Pull Requests

• feat: soft delete forum#4
• feat: added soft delete functionality frontend-app-discussions#6

[Copilot]

Pull request overview

This pull request implements soft delete functionality for the forum discussion system, allowing content to be marked as deleted without permanently removing it from the database.

Key Changes:

• Adds is_deleted, deleted_at, and deleted_by fields to track soft deletion metadata for threads and comments
• Implements soft delete operations that set deletion flags instead of permanently removing content
• Adds restoration functionality to undelete previously soft-deleted content
• Includes new API endpoints for bulk restore operations and viewing deleted content

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
openedx/core/djangoapps/django_comment_common/comment_client/utils.py	Formatting changes, quote style standardization
openedx/core/djangoapps/django_comment_common/comment_client/thread.py	Adds soft delete/restore methods and deletion metadata fields to Thread model
openedx/core/djangoapps/django_comment_common/comment_client/models.py	Updates delete methods to support deleted_by parameter and improved error handling
openedx/core/djangoapps/django_comment_common/comment_client/comment.py	Adds soft delete/restore methods and deletion metadata fields to Comment model
lms/djangoapps/discussion/rest_api/views.py	Adds new API endpoints for restore operations and viewing deleted content
lms/djangoapps/discussion/rest_api/urls.py	Registers new API endpoint URLs for restore and deleted content operations
lms/djangoapps/discussion/rest_api/tasks.py	Updates bulk delete/restore tasks to track deleted_by metadata
lms/djangoapps/discussion/rest_api/serializers.py	Adds serialization for deletion metadata fields
lms/djangoapps/discussion/rest_api/forms.py	Adds show_deleted form field for filtering deleted content
lms/djangoapps/discussion/rest_api/tests/*.py	Updates test files with formatting changes and new deletion field expectations

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Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 5 comments.

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Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated no new comments.

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