bookwyrm/bookwyrm/migrations/0077_auto_20210623_2155.py
Mouse Reeve 6470033ac9 Fixes search query syntax
mad about the lack of django docs on this, jeez
2021-06-26 16:20:18 -07:00

126 lines
4.9 KiB
Python

# Generated by Django 3.2.4 on 2021-06-23 21:55
import django.contrib.postgres.indexes
import django.contrib.postgres.search
from django.db import migrations
class Migration(migrations.Migration):
dependencies = [
("bookwyrm", "0076_preview_images"),
]
operations = [
migrations.AddField(
model_name="author",
name="search_vector",
field=django.contrib.postgres.search.SearchVectorField(null=True),
),
migrations.AddField(
model_name="book",
name="search_vector",
field=django.contrib.postgres.search.SearchVectorField(null=True),
),
migrations.AddIndex(
model_name="author",
index=django.contrib.postgres.indexes.GinIndex(
fields=["search_vector"], name="bookwyrm_au_search__b050a8_gin"
),
),
migrations.AddIndex(
model_name="book",
index=django.contrib.postgres.indexes.GinIndex(
fields=["search_vector"], name="bookwyrm_bo_search__51beb3_gin"
),
),
migrations.RunSQL(
sql="""
CREATE FUNCTION book_trigger() RETURNS trigger AS $$
begin
new.search_vector :=
coalesce(
NULLIF(setweight(to_tsvector('english', coalesce(new.title, '')), 'A'), ''),
setweight(to_tsvector('simple', coalesce(new.title, '')), 'A')
) ||
setweight(to_tsvector('english', coalesce(new.subtitle, '')), 'B') ||
(SELECT setweight(to_tsvector('simple', coalesce(array_to_string(array_agg(bookwyrm_author.name), ' '), '')), 'C')
FROM bookwyrm_book
LEFT OUTER JOIN bookwyrm_book_authors
ON bookwyrm_book.id = bookwyrm_book_authors.book_id
LEFT OUTER JOIN bookwyrm_author
ON bookwyrm_book_authors.author_id = bookwyrm_author.id
WHERE bookwyrm_book.id = new.id
) ||
setweight(to_tsvector('english', coalesce(new.series, '')), 'D');
return new;
end
$$ LANGUAGE plpgsql;
CREATE TRIGGER search_vector_trigger
BEFORE INSERT OR UPDATE OF title, subtitle, series, search_vector
ON bookwyrm_book
FOR EACH ROW EXECUTE FUNCTION book_trigger();
UPDATE bookwyrm_book SET search_vector = NULL;
""",
reverse_sql="""
DROP TRIGGER IF EXISTS search_vector_trigger
ON bookwyrm_book;
DROP FUNCTION IF EXISTS book_trigger;
""",
),
# when an author is edited
migrations.RunSQL(
sql="""
CREATE FUNCTION author_trigger() RETURNS trigger AS $$
begin
WITH book AS (
SELECT bookwyrm_book.id as row_id
FROM bookwyrm_author
LEFT OUTER JOIN bookwyrm_book_authors
ON bookwyrm_book_authors.id = new.id
LEFT OUTER JOIN bookwyrm_book
ON bookwyrm_book.id = bookwyrm_book_authors.book_id
)
UPDATE bookwyrm_book SET search_vector = ''
FROM book
WHERE id = book.row_id;
return new;
end
$$ LANGUAGE plpgsql;
CREATE TRIGGER author_search_vector_trigger
AFTER UPDATE OF name
ON bookwyrm_author
FOR EACH ROW EXECUTE FUNCTION author_trigger();
""",
reverse_sql="""
DROP TRIGGER IF EXISTS author_search_vector_trigger
ON bookwyrm_author;
DROP FUNCTION IF EXISTS author_trigger;
""",
),
# when an author is added to or removed from a book
migrations.RunSQL(
sql="""
CREATE FUNCTION book_authors_trigger() RETURNS trigger AS $$
begin
UPDATE bookwyrm_book SET search_vector = ''
WHERE id = coalesce(new.book_id, old.book_id);
return new;
end
$$ LANGUAGE plpgsql;
CREATE TRIGGER book_authors_search_vector_trigger
AFTER INSERT OR DELETE
ON bookwyrm_book_authors
FOR EACH ROW EXECUTE FUNCTION book_authors_trigger();
""",
reverse_sql="""
DROP TRIGGER IF EXISTS book_authors_search_vector_trigger
ON bookwyrm_book_authors;
DROP FUNCTION IF EXISTS book_authors_trigger;
""",
),
]