Add virtual md5 column to external_api_images

db/migrate/20250112032852_add_external_api_images_generated_md5_column_and_site_index.rb

@@ -0,0 +1,15 @@
+class AddExternalAPIImagesGeneratedMd5ColumnAndSiteIndex < ActiveRecord::Migration[7.1]
+  def change
+    add_index(:external_api_images, :site)
+    reversible do |r|
+      r.up do
+        exec_query("ALTER TABLE external_api_images ADD COLUMN md5 TEXT GENERATED ALWAYS AS (cached_data->'file'->>'md5') STORED")
+        add_index(:external_api_images, :md5)
+      end
+      r.down do
+        exec_query("ALTER TABLE external_api_images DROP COLUMN md5")
+        remove_index(:external_api_images, :md5)
+      end
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2024_10_21_212746) do
+ActiveRecord::Schema[7.1].define(version: 2025_01_12_032852) do
   create_schema "e621"
 
   # These are extensions that must be enabled in order to support this database
@@ -157,7 +157,10 @@ ActiveRecord::Schema[7.1].define(version: 2024_10_21_212746) do
     t.datetime "cache_last_updated_at", default: -> { "CURRENT_TIMESTAMP(3)" }, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    r    t.virtual "md5", type: :text, as: "((cached_data -> 'file'::text) ->> 'md5'::text)", stored: true
     t.index ["api_image_id"], name: "index_external_api_images_on_api_image_id"
+    t.index ["md5"], name: "index_external_api_images_on_md5"
+    t.index ["site"], name: "index_external_api_images_on_site"
   end
 
   create_table "good_job_batches", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|