#84 構文エラー修正

backend/app/models/tag.rb

@@ -1,6 +1,6 @@
 class Tag < ApplicationRecord
   has_many :post_tags, dependent: :delete_all, inverse_of: :tag
-  has_many :active_post_tags, -> { kept }, class_name: 'PostTag', :inverse_of: :tag
+  has_many :active_post_tags, -> { kept }, class_name: 'PostTag', inverse_of: :tag
   has_many :post_tags_with_discarded, -> { with_discarded }, class_name: 'PostTag'
   has_many :posts, through: :active_post_tags
   has_many :tag_aliases, dependent: :destroy

backend/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_10_11_200300) do
+ActiveRecord::Schema[8.0].define(version: 2025_12_10_123200) do
   create_table "active_storage_attachments", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -40,7 +40,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_10_11_200300) do
   end
 
   create_table "ip_addresses", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.binary "ip_adress", limit: 16, null: false
+    t.binary "ip_address", limit: 16, null: false
     t.boolean "banned", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
@@ -120,6 +120,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_10_11_200300) do
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.index ["parent_tag_id"], name: "index_tag_implications_on_parent_tag_id"
+    t.index ["tag_id", "parent_tag_id"], name: "index_tag_implications_on_tag_id_and_parent_tag_id", unique: true
     t.index ["tag_id"], name: "index_tag_implications_on_tag_id"
   end