Define search_vector_trigger via Book.Meta.triggers

bookwyrm/migrations/0191_migrate_search_vec_triggers_to_pgtriggers.py

@@ -27,6 +27,20 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
+        pgtrigger.migrations.AddTrigger(
+            model_name="book",
+            trigger=pgtrigger.compiler.Trigger(
+                name="update_search_vector_on_book_edit",
+                sql=pgtrigger.compiler.UpsertTriggerSql(
+                    func="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;",
+                    hash="9c898d46dfb7492ecd18f6c692bbecfa548f0e85",
+                    operation='INSERT OR UPDATE OF "title", "subtitle", "series", "search_vector"',
+                    pgid="pgtrigger_update_search_vector_on_book_edit_bec58",
+                    table="bookwyrm_book",
+                    when="BEFORE",
+                ),
+            ),
+        ),
         pgtrigger.migrations.AddTrigger(
             model_name="author",
             trigger=pgtrigger.compiler.Trigger(
@@ -41,6 +55,12 @@ class Migration(migrations.Migration):
                 ),
             ),
         ),
+        migrations.RunSQL(
+            sql="""DROP TRIGGER IF EXISTS search_vector_trigger ON bookwyrm_book;
+                   DROP FUNCTION IF EXISTS book_trigger;
+            """,
+            reverse_sql=search_vector_trigger.sql,
+        ),
         migrations.RunSQL(
             sql="""DROP TRIGGER IF EXISTS author_search_vector_trigger ON bookwyrm_author;
                    DROP FUNCTION IF EXISTS author_trigger;

bookwyrm/models/book.py

@@ -13,6 +13,7 @@ from django.utils.translation import gettext_lazy as _
 from model_utils import FieldTracker
 from model_utils.managers import InheritanceManager
 from imagekit.models import ImageSpecField
+import pgtrigger
 
 from bookwyrm import activitypub
 from bookwyrm.isbn.isbn import hyphenator_singleton as hyphenator
@@ -24,6 +25,7 @@ from bookwyrm.settings import (
     ENABLE_PREVIEW_IMAGES,
     ENABLE_THUMBNAIL_GENERATION,
 )
+from bookwyrm.utils.db import format_trigger
 
 from .activitypub_mixin import OrderedCollectionPageMixin, ObjectMixin
 from .base_model import BookWyrmModel
@@ -232,9 +234,38 @@ class Book(BookDataModel):
         )
 
     class Meta:
-        """sets up postgres GIN index field"""
+        """set up indexes and triggers"""
+
+        # pylint: disable=line-too-long
 
         indexes = (GinIndex(fields=["search_vector"]),)
+        triggers = [
+            pgtrigger.Trigger(
+                name="update_search_vector_on_book_edit",
+                when=pgtrigger.Before,
+                operation=pgtrigger.Insert
+                | pgtrigger.UpdateOf("title", "subtitle", "series", "search_vector"),
+                func=format_trigger(
+                    """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;
+                """
+                ),
+            )
+        ]
 
 
 class Work(OrderedCollectionPageMixin, Book):

bookwyrm/tests/test_book_search.py

@@ -213,7 +213,6 @@ class SearchVectorTriggers(TestCase):
 
         self.author.name = "Identifier"
         self.author.save(broadcast=False)
-        self.edition.refresh_from_db()
 
         self.assertFalse(self._search("Name"))
         self.assertEqual(self.edition, self._search_first("Identifier"))

bookwyrm/utils/db.py

@@ -16,6 +16,7 @@ def format_trigger(sql: str) -> str:
             sql,
             strip_comments=True,
             strip_whitespace=True,
+            use_space_around_operators=True,
             keyword_case="upper",
             identifier_case="lower",
         ),