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Use very fancy SQL nonsense

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This should be more efficient than running the queries one by one
This commit is contained in:
Joel Bradshaw 2021-02-26 23:12:39 -08:00
parent ee7388052c
commit 717cbe3034
1 changed files with 4 additions and 4 deletions
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8
bookwyrm/migrations/0046_reviewrating.py
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@ -4,6 +4,7 @@ from django.db import migrations, models
from django.db import connection
from django.db.models import Q
import django.db.models.deletion
from psycopg2.extras import execute_values
def convert_review_rating(app_registry, schema_editor):
''' take rating type Reviews and convert them to ReviewRatings '''
@ -16,11 +17,10 @@ def convert_review_rating(app_registry, schema_editor):
)
with connection.cursor() as cursor:
for review in reviews:
cursor.execute('''
values = [(r.id,) for r in reviews]
execute_values(cursor, '''
INSERT INTO bookwyrm_reviewrating(review_ptr_id)
SELECT status_ptr_id FROM bookwyrm_review
WHERE status_ptr_id=%s''', (review.id))
VALUES %s''', values)
def unconvert_review_rating(app_registry, schema_editor):
''' undo the conversion from ratings back to reviews'''