Merge pull request #3370 from AlchemyCMS/created_at-index

Add index to `created_at` on attachment and pictures tables

Author: tvdeyen

db/migrate/20250905140323_add_created_at_index_to_pictures_and_attachments.rb

@@ -0,0 +1,14 @@
+class AddCreatedAtIndexToPicturesAndAttachments < ActiveRecord::Migration[7.1]
+  disable_ddl_transaction! if connection.adapter_name.match?(/postgres/i)
+
+  def change
+    add_index :alchemy_pictures, :created_at, if_not_exists: true, algorithm: algorithm
+    add_index :alchemy_attachments, :created_at, if_not_exists: true, algorithm: algorithm
+  end
+
+  private
+
+  def algorithm
+    connection.adapter_name.match?(/postgres/i) ? :concurrently : nil
+  end
+end

spec/dummy/db/migrate/20250905140502_add_created_at_index_to_pictures_and_attachments.alchemy.rb

@@ -0,0 +1,15 @@
+# This migration comes from alchemy (originally 20250905140323)
+class AddCreatedAtIndexToPicturesAndAttachments < ActiveRecord::Migration[7.1]
+  disable_ddl_transaction! if connection.adapter_name.match?(/postgres/i)
+
+  def change
+    add_index :alchemy_pictures, :created_at, if_not_exists: true, algorithm: algorithm
+    add_index :alchemy_attachments, :created_at, if_not_exists: true, algorithm: algorithm
+  end
+
+  private
+
+  def algorithm
+    connection.adapter_name.match?(/postgres/i) ? :concurrently : nil
+  end
+end

spec/dummy/db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_06_26_160417) do
+ActiveRecord::Schema[8.0].define(version: 2025_09_05_140502) do
   create_table "active_storage_attachments", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -49,6 +49,7 @@
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.string "file_uid"
+    t.index ["created_at"], name: "index_alchemy_attachments_on_created_at"
     t.index ["creator_id"], name: "index_alchemy_attachments_on_creator_id"
     t.index ["file_uid"], name: "index_alchemy_attachments_on_file_uid"
     t.index ["updater_id"], name: "index_alchemy_attachments_on_updater_id"
@@ -246,6 +247,7 @@
     t.string "image_file_uid"
     t.integer "image_file_size"
     t.string "image_file_format"
+    t.index ["created_at"], name: "index_alchemy_pictures_on_created_at"
     t.index ["creator_id"], name: "index_alchemy_pictures_on_creator_id"
     t.index ["image_file_name"], name: "index_alchemy_pictures_on_image_file_name"
     t.index ["name"], name: "index_alchemy_pictures_on_name"