This commit introduces several improvements to database migration
scripts to enhance compatibility between MySQL and PostgreSQL, ensure
case-sensitive behavior where needed, and improve migration safety and
correctness. The changes include dynamic SQL generation based on the
database engine, improved transaction handling, and adjustments to
field types and adapters for better cross-database support.
Database compatibility and case sensitivity improvements:
- Migration scripts in split_modulestore_django and learning_sequences
now dynamically generate SQL statements for altering column case
sensitivity and uniqueness based on whether the database is MySQL or
PostgreSQL, ensuring correct behavior across both backends.
- common/djangoapps/split_modulestore_django/migrations/0001_initial.py
- openedx/core/djangoapps/content/learning_sequences/migrations/0001_initial.py
- The courseware.fields module now checks for "postgresql" in the
database engine string instead of a specific backend name, improving
compatibility with different PostgreSQL drivers.
- lms/djangoapps/courseware/fields.py
- The 0011_csm_id_bigint migration in courseware now supports both MySQL
and PostgreSQL for altering column types, with specific SQL for each
backend.
- lms/djangoapps/courseware/migrations/0011_csm_id_bigint.py
- The 0009_readd_facebook_url migration in course_overviews now
introspects the table structure using backend-specific SQL for MySQL
and PostgreSQL, ensuring correct detection of existing fields.
- openedx/core/djangoapps/content/course_overviews/migrations/0009_readd_facebook_url.py
Migration safety and correctness:
- Service user creation and deletion in the commerce app is now wrapped
in atomic transactions to ensure database consistency.
- lms/djangoapps/commerce/migrations/0001_data__add_ecommerce_service_user.py
- The move_overrides_to_edx_when migration in courseware now specifies
a no-op reverse migration, preventing accidental data loss on migration
rollback.
- lms/djangoapps/courseware/migrations/0008_move_idde_to_edx_when.py
Adapter registration and code cleanup:
- The common_initialization app now registers custom adapters for
CourseLocator and related classes in psycopg2 when using PostgreSQL,
ensuring proper serialization of these types.
- openedx/core/djangoapps/common_initialization/apps.py
- Minor code cleanup and formatting improvements in migration files,
including import order and field formatting for readability.
- lms/djangoapps/grades/migrations/0015_historicalpersistentsubsectiongradeoverride.py
ecommerce_worker is the only service user with a @fake.email instead of
an @example.com email address. This was fixed manually in a devstack sql
dump, but was lost during the next sql dump. This will fix it moving
forward so we don't have to work around it.
* fix type mismatch in third_party_auth migrations
* fix type mismatch in verify_student migrations
* fix type mismatch in video_config migrations
* fix type mismatch in verified_track_content migrations
* fix type mismatch in commercemigrations
* fix type mismatch in xblock_config migrations
* fix type mismatch in course_creators migrations
* fix type mismatch in contentstore migrations
Refunds are now processed automatically. If the automated processing fails, the system falls back to the previous behavior of notifying the Support Team. Additionally, these calls are all made by the service user rather than the learner.
ECOM-6541
Django's user model allows email addresses to be blank. However, edx-platform includes a migration requiring that email addresses be unique. Someone in our production environment already had a blank email address, so this migration was failing earlier.
