我对目前的活动记录协会有疑问。
我正在制作一个基于问题的评论系统(非常类似于stackoverflow)。
我正在查看关联,用户有很多评论,评论属于用户。
现在,当我发表实际评论时,user_id应该包含在我的评论的user_id字段中,因为我正在建立关联,对吗?
这是我的架构:
create_table "users", force: true do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.integer "question_id", limit: 255
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string "current_sign_in_ip"
t.string "last_sign_in_ip"
t.datetime "created_at"
t.datetime "updated_at"
t.string "provider"
t.string "uid"
t.string "name"
end
create_table "comments", force: true do |t|
t.integer "user_id" **THIS IS WHERE I AM EXPECTING A JOIN AND WHEN A USER MAKES A COMMENT TO HAVE THE USER_ID NUMBER STORED HERE
t.integer "question_id"
t.text "comment"
t.integer "upvotes"
t.datetime "created_at"
t.datetime "updated_at"
end
以下是我的Active Record Association:
USER.RB:
class User < ActiveRecord::Base
has_many :questions
has_many :comments
has_many :votes
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable, :omniauthable,
:recoverable, :rememberable, :trackable, :validatable
def self.from_omniauth(auth)
where(auth.slice(:provider, :uid)).first_or_create do |user|
user.provider = auth.provider
user.uid = auth.uid
# user.username = auth.info.nickname
user.email = auth.info.email
user.name = auth.info.name
end
end
def self.new_with_session(params, session)
if session["devise.user_attributes"]
new(session["devise.user_attributes"], without_protection: true) do |user|
user.attributes = params
user.valid?
end
else
super
end
end
def password_required?
super && provider.blank?
end
def update_with_password(params, *options)
if encrypted_password.blank?
update_attributes(params, *options)
else
super
end
end
end
Comment.rb:
class Comment < ActiveRecord::Base
belongs_to :question
belongs_to :user
has_many :votes
end
我的最终目标是让我的评论架构在发表新评论时注册user_id,并将评论与用户相关联。
现在,我的user_id是“nil”
**这是Backbone前端的rails后端
答案 0 :(得分:1)
不,相关记录的user_id
字段只有在您创建 关联时才会“自动”填写,如:
user.comments << Comment.create(...)
有关其他选项,请参阅http://guides.rubyonrails.org/association_basics.html#has-many-association-reference。当然,您也可以手动设置user_id
。