Copy course_id into course_key and remove temporary transition code #138
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The migration copies content of the Answer.course_id column into the new extended Answer.course_key column. It skips Answer records that already have the course_key column set.
Previous migration populates any null course_key fields, so we can now change the column to not allow NULL values. We make the deprecated course_id nullable, to be able to start ignoring it later.
Now that all data has been migrated to the new course_key column, we can remove the temporary transition code.
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Looks good @mtyaka. :) 👍
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@edx/devops Can somebody please review this follow-up to the hotfix we did for problem-builder. It removes the temporary transition code and includes a migration that copies values from the deprecated column into the new, extended /cc @adampalay |
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code looks ok to me! But this should definitely get ops approval :) |
maxrothman
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Jan 24, 2017
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This is a follow-up to #131. In #131, we deprecated the
Answer.course_idfield and replaced it with a newAnswer.course_keyfield with extended length to accommodate courses with course keys longer than 50 characters (for example some CCX courses on edx.org have course keys longer than 50 characters).This PR includes a migration that copies contents of
course_idcolumn intocourse_key, for anyAnswerobject wherecourse_keyisNULL(these areAnswerobjects that were created before problem-builder v2.6.5 was deployed).NOTE: Before deploying v2.6.6 to production, edX will have to fake this migration and manually copy
course_idvalues intocourse_keyin batches because the productionproblem_builder_answertable is large and performing the migration in one go would degrade performance!Next, this PR also includes a migration that makes the
course_keymandatory and removes transition code that supports bothcourse_idandcourse_keycolumns.The
course_idcolumn is only deprecated at this point, but could safely be dropped in the future.Environments: edx.org and edge.edx.org
JIRA tickets: TNL-5932
Discussions: See https://github.com/edx/edx-platform/pull/14013 and JIRA ticket.
Sandbox URLs:
Built with c733391.
Partner information: hosted on edX Edge (Davidson College)
Testing instructions:
This patch should not change functionality in any way. Verify that long Answer objects still work correctly on the sandbox.
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