我正在开发一个示例Rails应用程序,其中包含用户,事件(用户创建),最终用户可以订阅/参加这些活动。
我需要创建一个直通表来跟踪这些事件的与会者的event_ids和user_ids。虽然我认为它设置正确,但当我通过用户查询数据库而不是获取事件ActiveRecords时,我获得了用户活动记录。
testUser = User.find(4)
testUser.events_to_attend
SELECT "users".* FROM "users" INNER JOIN "attendees" ON "users"."id" = "attendees"."user_id" WHERE "attendees"."user_id" = ? [["user_id", 4]]
=> #<ActiveRecord::Associations::CollectionProxy [#<User id: 4, name: "Steve Bear", email: "steve@bear.com", password: nil, password_confirmation: nil, created_at: "2016-09-01 21:20:08", updated_at: "2016-09-01 21:20:08", password_digest: "$2a$10$iytkAI9EmrmCG6aRsvK13.50ssBxWs.i5G1T1HjgPQz...">, #<User id: 4, name: "Steve Bear", email: "steve@bear.com", password: nil, password_confirmation: nil, created_at: "2016-09-01 21:20:08", updated_at: "2016-09-01 21:20:08", password_digest: "$2a$10$iytkAI9EmrmCG6aRsvK13.50ssBxWs.i5G1T1HjgPQz...">]>
从这里可以看出我没有进行正确的SQL调用,但是我不确定如何配置它以拉出用户所关联的事件记录?
user.rb
class User < ApplicationRecord
has_many :events, dependent: :destroy
has_many :attendees
has_many :events_to_attend, through: :attendees, source: :user
validates :name, presence: true, length: { maximum: 50 }
VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-]+(\.[a-z\d\-]+)*\.[a-z]+\z/i
validates :email, presence: true, length: {maximum: 225}, format: {:with => VALID_EMAIL_REGEX}, uniqueness: {case_sensitive: false }
has_secure_password
validates :password, length: { minimum: 6 }, presence: true, allow_nil: true
end
event.rb
class Event < ApplicationRecord
belongs_to :user
validates :user_id, presence: true
end
attendee.rb
class Attendee < ApplicationRecord
belongs_to :event
belongs_to :user
end
如果对任何人都有帮助,我很乐意列出我的迁移
答案 0 :(得分:0)
你有......
has_many :events_to_attend, through: :attendees, source: :user
我认为你想要的是活动,而不是用户......
has_many :events_to_attend, through: :attendees, source: :event