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LOD Syncing: create canonical set of assignments when learner is assigned multiple ways #11860

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bjester
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@bjester bjester commented Feb 12, 2024

Summary

  • Creates helper function that generates accepts a queryset and returns another queryset that selects only the canonical assignments when a lesson or exam is assigned to the learner through multiple ways, i.e. classroom, group or individual
  • Adds to existing morango integration tests to add coverage on this scenario
  • Adds unit tests for the helper

Note:
I was unable to get the SQLite version to be performed in pure SQL due to issues with Django forcing the CASE expression used in the ORDER BY into the SELECT expression

References

Fixes undocumented issue referenced in #11845

Reviewer guidance

  • Does it make sense?
  • Does the postgres version work?
  • Running morango integration tests help, which I ran both for SQLite and Postgres

Testing checklist

  • Contributor has fully tested the PR manually
  • If there are any front-end changes, before/after screenshots are included
  • Critical user journeys are covered by Gherkin stories
  • Critical and brittle code paths are covered by unit tests

PR process

  • PR has the correct target branch and milestone
  • PR has 'needs review' or 'work-in-progress' label
  • If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
  • If this is an important user-facing change, PR or related issue has a 'changelog' label
  • If this includes an internal dependency change, a link to the diff is provided

Reviewer checklist

  • Automated test coverage is satisfactory
  • PR is fully functional
  • PR has been tested for accessibility regressions
  • External dependency files were updated if necessary (yarn and pip)
  • Documentation is updated
  • Contributor is in AUTHORS.md

@github-actions github-actions bot added DEV: backend Python, databases, networking, filesystem... SIZE: medium labels Feb 12, 2024
@bjester bjester requested a review from rtibbles February 12, 2024 20:22
@bjester bjester added the TODO: needs review Waiting for review label Feb 12, 2024
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Code readthrough checks out, and integration tests pass.


# Theoretically, we could use a subquery to get the canonical assignment for each resource_id
# but Django pushes the ORDER BY clause into the subquery's SELECT clause, even with
# `values('id')`, which breaks the `id__in` filter because 2 columns are returned instead of 1
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Yes, this sounds very familiar.

@rtibbles rtibbles merged commit 6159752 into learningequality:release-v0.16.x Feb 12, 2024
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2 participants