setting group and user 多對多資料庫關聯

Author: sdlong

app/models/group.rb

@@ -4,6 +4,9 @@ class Group < ActiveRecord::Base
   has_many :posts
   belongs_to :owner, class_name: "User", foreign_key: :user_id
 
+  has_many :group_users
+  has_many :memebers, through: :group_users, source: :user
+
   def editable_by?(user)
     user && user == owner
   end

app/models/group_user.rb

@@ -1,2 +1,4 @@
 class GroupUser < ActiveRecord::Base
+  belongs_to :user
+  belongs_to :group
 end

app/models/user.rb

@@ -6,4 +6,8 @@ class User < ActiveRecord::Base
 
   has_many :groups
   has_many :posts
+
+  has_many :group_users
+  has_many :participated_groups, through: :group_users, source: :group
+
 end