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feat: Read course indexes from MySQL, not MongoDB (#29184)

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Description
This is a follow up to #29058 and #29413. This is the next step in moving part of the modulestore data (the course indexes / "active versions" table) from MongoDB to MySQL.

There are four steps planned in moving course index data to MySQL:

Step 1: create the tables in MySQL, start writing to MySQL + MongoDB ✅ done
Step 2: migrate all remaining courses to MySQL ✅ done
Step 3: switch reads from MongoDB to MySQL (this PR)
Step 4 (much later, once we know this is working well): stop writing to MongoDB altogether.
Supporting information
OpenCraft Jira ticket: MNG-2557

Status
✅ Tested with a large Open edX instance is in progress.

Testing instructions
Try making changes in Studio and verify that they work fine.

Deadline
None
This commit is contained in:
Braden MacDonald
2022-03-09 07:21:09 -08:00
committed by GitHub
parent 835285d494
commit dcb7ef8821
34 changed files with 145 additions and 169 deletions
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6
openedx/tests/completion_integration/test_models.py
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@@ -63,7 +63,7 @@ class SubmitCompletionTestCase(CompletionSetUpMixin, TestCase):
def test_changed_value(self):
with self.assertNumQueries(SELECT + UPDATE + 2 * SAVEPOINT + 2 * OTHER):
# OTHER = user exists, completion exists, 2x look up course in splitmodulestorecourseindex
# OTHER = user exists, completion exists
completion, isnew = models.BlockCompletion.objects.submit_completion(
user=self.user,
block_key=self.block_key,
@@ -88,7 +88,7 @@ class SubmitCompletionTestCase(CompletionSetUpMixin, TestCase):
def test_new_user(self):
newuser = UserFactory()
with self.assertNumQueries(SELECT + UPDATE + 4 * SAVEPOINT + 0 * OTHER):
with self.assertNumQueries(SELECT + UPDATE + 4 * SAVEPOINT):
_, isnew = models.BlockCompletion.objects.submit_completion(
user=newuser,
block_key=self.block_key,
@@ -99,7 +99,7 @@ class SubmitCompletionTestCase(CompletionSetUpMixin, TestCase):
def test_new_block(self):
newblock = UsageKey.from_string('block-v1:edx+test+run+type@video+block@puppers')
with self.assertNumQueries(SELECT + UPDATE + 4 * SAVEPOINT + 0 * OTHER):
with self.assertNumQueries(SELECT + UPDATE + 4 * SAVEPOINT):
_, isnew = models.BlockCompletion.objects.submit_completion(
user=self.user,
block_key=newblock,