#2 完了

backend/app/models/nico_tag_relation.rb

@@ -3,7 +3,7 @@ class NicoTagRelation < ApplicationRecord
   belongs_to :tag, class_name: 'Tag', foreign_key: 'tag_id'
 
   validates :nico_tag_id, presence: true
-  validates :tag_id, prosence: true
+  validates :tag_id, presence: true
 
   validate :nico_tag_must_be_nico
 

backend/app/models/post.rb

@@ -1,4 +1,7 @@
 class Post < ApplicationRecord
   belongs_to :parent, class_name: 'Post', optional: true, foreign_key: 'parent_id'
   belongs_to :user, foreign_key: ''
+  has_many :post_tags, dependent: :destroy
+  has_many :tags, through: :post_tags
+  has_many :user_post_views, dependent: :destroy
 end

backend/app/models/post_tag.rb

@@ -0,0 +1,7 @@
+class PostTag < ApplicationRecord
+  belongs_to :post
+  belongs_to :tag
+
+  validates :post_id, presence: true
+  validates :tag_id, presence: true
+end

backend/app/models/setting.rb

@@ -0,0 +1,7 @@
+class Setting < ApplicationRecord
+  belongs_to :user
+
+  validates :user_id, presence: true
+  validates :key, presence: true, length: { maximum: 255 }
+  validates :value, presence: true
+end

backend/app/models/tag.rb

@@ -1,4 +1,9 @@
 class Tag < ApplicationRecord
+  has_many :post_tags, dependent: :destroy
+  has_many :posts, through: :post_tags
+  has_many :tag_aliases, dependent: :destroy
+  has_many :wiki_pages, dependent: :nullify
+
   validates :name, presence: true, length: { maximum: 255 }
   validates :category, presence: true, inclusion: { in: categories.keys }
 
@@ -10,5 +15,5 @@ class Tag < ApplicationRecord
                    nico:        'nico',
                    meta:        'meta' }
 
-  scope :nico_tags, -> { where(category: :nico) }
+  scope :nico_tags, -> { where category: :nico }
 end

backend/app/models/tag_alias.rb

@@ -0,0 +1,6 @@
+class TagAlias < ApplicationRecord
+  belongs_to :tag
+
+  validates :tag_id, presence: true
+  validates :name, presence: true, length: { maximum: 255 }, uniqueness: true
+end

backend/app/models/user.rb

@@ -9,4 +9,18 @@ class User < ApplicationRecord
   has_many :posts
   has_many :settings
   has_many :ip_addresses
+  has_many :user_ips, dependent: :destroy
+  has_many :ip_addresses, through: :user_ips
+  has_many :user_post_views, dependent: :destroy
+  has_many :viewed_posts, through: :user_post_views, source: :post
+  has_many :created_wiki_pages, { class_name: 'WikiPage',
+                                  foreign_key: 'created_user_id',
+                                  dependent: :nullify }
+  has_many :updated_wiki_pages, { class_name: 'WikiPage',
+                                  foreign_key: 'updated_user_id',
+                                  dependent: :nullify }
+
+  def viewed? post
+    user_post_views.exists? post_id: post.id, viewed: true
+  end
 end

backend/app/models/user_ips.rb

@@ -0,0 +1,7 @@
+class UserIp < ApplicationRecord
+  belongs_to :user
+  belongs_to :ip_address
+
+  validates :user_id, presence: true
+  validates :ip_address_id, presence: true
+end

backend/app/models/user_post_view.rb

@@ -0,0 +1,7 @@
+class UserPostView < ApplicationRecord
+  belongs_to :user
+  belongs_to :post
+
+  validates :user_id, presence: true
+  validates :post_id, presence: true
+end

backend/app/models/wiki_page.rb

@@ -0,0 +1,11 @@
+class WikiPage < ApplicationRecord
+  belongs_to :tag, optional: true
+  belongs_to :created_user, class_name: 'User', foreign_key: 'created_user_id'
+  belongs_to :updated_user, class_name: 'User', foreign_key: 'updated_user_id'
+
+  validates :title, presence: true, length: { maximum: 255 }, uniqueness: true
+
+  def gollum_path
+    "wiki/#{ title.parameterize }.md"
+  end
+end