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stvn authoredThe difficulty here is that the empty string in an invalid JSON dictionary (as opposed to None/NULL or '{}' which is just "blank"); attempts to instantiate models would fail, given the invalid data. This meant we couldn't use the Django ORM to handle the migration entirely; we need to craft some raw SQL to work-around these checks and limitations. Related-To: 42a9e342 Related-To: https://github.com/edx/xblock-lti-consumer/pull/144stvn authoredThe difficulty here is that the empty string in an invalid JSON dictionary (as opposed to None/NULL or '{}' which is just "blank"); attempts to instantiate models would fail, given the invalid data. This meant we couldn't use the Django ORM to handle the migration entirely; we need to craft some raw SQL to work-around these checks and limitations. Related-To: 42a9e342 Related-To: https://github.com/edx/xblock-lti-consumer/pull/144