使用 Rails 5 + Devise,我无法让模型相互关联
Using Rails 5 + Devise, I can't get the models to associate with each other
最初我有一个属于 User 模型的 Joke.rb 模型。笑话 table 有 :joke, :author。它在使用 @joke = current_user.jokes.new(joke_params)
时完美运行,但我将 :author 从 Joke 模型中取出并使其成为自己的模型,这样我就可以为每个作者制作虚荣 url 的/动态路线,当一个笑话是由用户创建。这是我现在拥有的:
用户模型:
has_many :jokes
笑话模型:
belongs_to :user
has_one :author
作者模型:
has_many :jokes
这是我的架构:
ActiveRecord::Schema.define(version: 20170703173447) do
create_table "authors", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "jokes", force: :cascade do |t|
t.string "joke"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "user_id"
end
create_table "users", force: :cascade do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
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", null: false
t.datetime "updated_at", null: false
t.index ["email"], name: "index_users_on_email", unique: true
t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
end
end
这是我的笑话控制器:
class JokesController < ApplicationController
before_action :set_joke, only: [:show, :edit, :update, :destroy]
before_action :authenticate_user!, except: [:index]
def index
@joke = Joke.order("Random()").first
end
def my_jokes
@jokes = current_user.jokes.all
end
def new
@joke = current_user.jokes.new
end
def create
@joke = current_user.jokes.new(joke_params)
if @joke.save
redirect_to root_path, notice: 'Joke was successfully added!'
else
render :new
end
end
def update
if @joke.update(joke_params)
redirect_to root_path, notice: 'Joke was successfully updated.'
else
render :edit
end
end
def destroy
@joke.destroy
redirect_to my_jokes_path, notice: 'Joke was successfully deleted.'
end
def edit
end
def about
end
private
def joke_params
params.require(:joke).permit(:joke, :name)
end
def set_joke
@joke = Joke.find(params[:id])
end
end
在rails控制台中,调用Author或Joke时,两者都没有关联。
我已经尝试了很多不同的东西,但我无法让它工作。我在这里以及通过教程已经从半相关问题中得到了许多答案,但我很烂。请帮助,谢谢! :)
NoMethodError: undefined method jokes' for Class:0x007fbefa5c4160
你调用 Author.jokes
是错误的。您应该使用 joins
或 includes
Author.joins(:jokes)
或
Author.includes(:jokes)
另外,你的联想也不对。 Author
中的 has_many :jokes
是正确的,但 Joke
中的 has_one :author
是 不正确的 。也许你应该 belongs_to :author
。我推荐你阅读 associations
最初我有一个属于 User 模型的 Joke.rb 模型。笑话 table 有 :joke, :author。它在使用 @joke = current_user.jokes.new(joke_params)
时完美运行,但我将 :author 从 Joke 模型中取出并使其成为自己的模型,这样我就可以为每个作者制作虚荣 url 的/动态路线,当一个笑话是由用户创建。这是我现在拥有的:
用户模型:
has_many :jokes
笑话模型:
belongs_to :user
has_one :author
作者模型:
has_many :jokes
这是我的架构:
ActiveRecord::Schema.define(version: 20170703173447) do
create_table "authors", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "jokes", force: :cascade do |t|
t.string "joke"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "user_id"
end
create_table "users", force: :cascade do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
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", null: false
t.datetime "updated_at", null: false
t.index ["email"], name: "index_users_on_email", unique: true
t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
end
end
这是我的笑话控制器:
class JokesController < ApplicationController
before_action :set_joke, only: [:show, :edit, :update, :destroy]
before_action :authenticate_user!, except: [:index]
def index
@joke = Joke.order("Random()").first
end
def my_jokes
@jokes = current_user.jokes.all
end
def new
@joke = current_user.jokes.new
end
def create
@joke = current_user.jokes.new(joke_params)
if @joke.save
redirect_to root_path, notice: 'Joke was successfully added!'
else
render :new
end
end
def update
if @joke.update(joke_params)
redirect_to root_path, notice: 'Joke was successfully updated.'
else
render :edit
end
end
def destroy
@joke.destroy
redirect_to my_jokes_path, notice: 'Joke was successfully deleted.'
end
def edit
end
def about
end
private
def joke_params
params.require(:joke).permit(:joke, :name)
end
def set_joke
@joke = Joke.find(params[:id])
end
end
在rails控制台中,调用Author或Joke时,两者都没有关联。
我已经尝试了很多不同的东西,但我无法让它工作。我在这里以及通过教程已经从半相关问题中得到了许多答案,但我很烂。请帮助,谢谢! :)
NoMethodError: undefined method jokes' for Class:0x007fbefa5c4160
你调用 Author.jokes
是错误的。您应该使用 joins
或 includes
Author.joins(:jokes)
或
Author.includes(:jokes)
另外,你的联想也不对。 Author
中的 has_many :jokes
是正确的,但 Joke
中的 has_one :author
是 不正确的 。也许你应该 belongs_to :author
。我推荐你阅读 associations