Stop orphaning hangers when deleting lists

Idk if this used to be different or what, but it looks like the current
behavior is: if you delete a closet list, it'll leave the hangers
present, but Classic DTI would not show them anywhere; but Impress 2020
(until recently) would crash about it.

Now, we use `dependent: :destroy` to delete the hangers when you delete
the list (which I think makes sense, and is different than what I
decided in the past but that's ok, and is what the current behavior
*looks* like to people!), and we add a migration that deletes orphaned
hangers.

The migration also outputs the deleted hangers as JSON, for us to hold
onto in case we made a mistake! I'm also backing up the database in
advance of running this migration, just in case we gotta roll back HARD!

app/models/closet_list.rb

@@ -1,6 +1,6 @@
 class ClosetList < ApplicationRecord
   belongs_to :user
-  has_many :hangers, :class_name => 'ClosetHanger', :foreign_key => 'list_id'
+  has_many :hangers, class_name: 'ClosetHanger', foreign_key: 'list_id', dependent: :destroy
 
   validates :name, :presence => true, :uniqueness => {:scope => :user_id}
   validates :user, :presence => true

db/migrate/20231024221826_delete_orphaned_closet_hangers.rb

@@ -0,0 +1,12 @@
+class DeleteOrphanedClosetHangers < ActiveRecord::Migration[7.0]
+  def up
+    orphaned_hangers = ClosetHanger.left_outer_joins(:list).
+      where("closet_hangers.list_id IS NOT NULL").where("closet_lists.id IS NULL")
+    puts orphaned_hangers.to_json
+    orphaned_hangers.delete_all
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration, "The orphaned hangers are already gone!"
+  end
+end

db/openneo_id_schema.rb

@@ -11,7 +11,7 @@
 # It's strongly recommended that you check this file into your version control system.
 
 ActiveRecord::Schema[7.0].define(version: 2023_08_07_005748) do
-  create_table "users", id: { type: :integer, unsigned: true }, charset: "utf8", force: :cascade do |t|
+  create_table "users", id: { type: :integer, unsigned: true }, charset: "utf8mb3", force: :cascade do |t|
     t.string "name", limit: 20, null: false
     t.string "encrypted_password", limit: 64, null: false
     t.string "email", limit: 50, null: false

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_08_02_195548) do
+ActiveRecord::Schema[7.0].define(version: 2023_10_24_221826) do
   create_table "auth_servers", id: :integer, charset: "latin1", force: :cascade do |t|
     t.string "short_name", limit: 10, null: false
     t.string "name", limit: 40, null: false
@@ -114,11 +114,11 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_02_195548) do
     t.index ["outfit_id", "is_worn"], name: "index_item_outfit_relationships_on_outfit_id_and_is_worn"
   end
 
-  create_table "item_translations", id: :integer, charset: "latin1", force: :cascade do |t|
+  create_table "item_translations", id: :integer, charset: "utf8mb4", collation: "utf8mb4_unicode_ci", force: :cascade do |t|
     t.integer "item_id"
     t.string "locale"
     t.string "name"
-    t.text "description"
+    t.text "description", size: :medium
     t.string "rarity"
     t.datetime "created_at", precision: nil
     t.datetime "updated_at", precision: nil
@@ -128,7 +128,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_02_195548) do
     t.index ["name"], name: "index_item_translations_name"
   end
 
-  create_table "items", id: :integer, charset: "utf8", collation: "utf8_unicode_ci", force: :cascade do |t|
+  create_table "items", id: :integer, charset: "utf8mb3", collation: "utf8mb3_unicode_ci", force: :cascade do |t|
     t.text "zones_restrict", null: false
     t.text "thumbnail_url", size: :medium, null: false
     t.string "category", limit: 50
@@ -187,7 +187,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_02_195548) do
     t.index ["user_id"], name: "index_outfits_on_user_id"
   end
 
-  create_table "parents_swf_assets", id: :integer, charset: "utf8", collation: "utf8_unicode_ci", force: :cascade do |t|
+  create_table "parents_swf_assets", id: :integer, charset: "utf8mb3", collation: "utf8mb3_unicode_ci", force: :cascade do |t|
     t.integer "parent_id", limit: 3, null: false
     t.integer "swf_asset_id", limit: 3, null: false
     t.string "parent_type", limit: 8, null: false
@@ -202,7 +202,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_02_195548) do
     t.datetime "created_at", precision: nil, null: false
   end
 
-  create_table "pet_states", id: :integer, charset: "utf8", collation: "utf8_unicode_ci", force: :cascade do |t|
+  create_table "pet_states", id: :integer, charset: "utf8mb3", collation: "utf8mb3_unicode_ci", force: :cascade do |t|
     t.integer "pet_type_id", limit: 3, null: false
     t.text "swf_asset_ids", null: false
     t.boolean "female"
@@ -214,7 +214,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_02_195548) do
     t.index ["pet_type_id"], name: "pet_states_pet_type_id"
   end
 
-  create_table "pet_types", id: :integer, charset: "utf8", collation: "utf8_unicode_ci", force: :cascade do |t|
+  create_table "pet_types", id: :integer, charset: "utf8mb3", collation: "utf8mb3_unicode_ci", force: :cascade do |t|
     t.integer "color_id", limit: 1, null: false
     t.integer "species_id", limit: 1, null: false
     t.datetime "created_at", precision: nil, null: false
@@ -248,7 +248,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_02_195548) do
     t.index ["species_id"], name: "index_species_translations_on_species_id"
   end
 
-  create_table "swf_assets", id: :integer, charset: "utf8", collation: "utf8_unicode_ci", force: :cascade do |t|
+  create_table "swf_assets", id: :integer, charset: "utf8mb3", collation: "utf8mb3_unicode_ci", force: :cascade do |t|
     t.string "type", limit: 7, null: false
     t.integer "remote_id", limit: 3, null: false
     t.text "url", size: :medium, null: false