私はこの例外を受け取り続けます:"SQLite3::SQLException: no such column: books.user_id: SELECT "books".* FROM "books" WHERE ("books".user_id = 4)"
。これは、booksテーブルにuser_idがないように聞こえます。
そこで、Foreignerプラグインをインストールして、ブック移行ファイルに追加"t.integer :user_id, :null => false"
しました。"add_foreign_key(:books, :users)"
実行しまし"rake db:migrate"
たが、それでも同じ例外が発生します。
WindowsとDeviseでRails3を使用してユーザーを認証しています。
ホームビュー
<p><%= link_to "Add new Book",:controller =>"book", :action => 'new' %></p>
<% @books.each do |b| %>
<p><%= b.author%></p>
<p><%= b.title%></p>
<%end%>
ホームコントローラー
class HomeController < ApplicationController
def index
@user = current_user
@user.books||=Book.new
@books=@user.books
end
end
ブックコントローラー
class BookController < ApplicationController
def new
@books = Book.new
# redirect_to :controller=>"home" ,:action=>"index"
end
def create
@books = Book.new(params[:book])
if @books.save
render "home/index"
#redirect_to :controller=>"home" ,:action=>"index"
else
render :action => 'new'
end
end
テーブル/ブックの移行を作成する
class CreateBooks < ActiveRecord::Migration
def self.up
create_table :books do |t|
t.text :title
t.text :author
t.integer :user_id, :null => false
t.timestamps
end
add_foreign_key(:books, :users)
end
ブックビュー
<h1>Book#new</h1>
<%= form_for(:book) do |f| %>
<p><%= f.text_field :title %></p>
<p><%= f.text_field :author %></p>
<p><%= f.submit "Add book"%>
ブックモデル
class Book < ActiveRecord::Base
belongs_to :user
end
ユーザーモデル
class User < ActiveRecord::Base
has_many :books
# Include default devise modules. Others available are:
# :token_authenticatable, :lockable, :timeoutable and :activatable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation,:firstname,:lastname,:school,:major,:sex,:zipcode
end
ROUTE Campus::Application.routes.drawは「book/index」を取得します
get "book/edit"
get "book/new"
get "home/edit"
devise_for :users
resources :book
root :to=> "home#index"
match '/book/new' =>"home#index"
end
データベーススキーマ
ActiveRecord::Schema.define(:version => 20110609055608) do
create_table "books", :force => true do |t|
t.text "title"
t.text "author"
t.integer "user_id", :null => false
t.datetime "created_at"
t.datetime "updated_at"
end
create_table "courses", :force => true do |t|
t.string "name"
t.datetime "created_at"
t.datetime "updated_at"
end
create_table "strong_ins", :force => true do |t|
t.string "subject"
t.string "topic"
t.text "description"
t.datetime "created_at"
t.datetime "updated_at"
end
create_table "users", :force => true do |t|
t.string "email", :default => "", :null => false
t.string "encrypted_password", :limit => 128, :default => "", :null => false
t.string "password_salt", :default => "", :null => false
t.string "reset_password_token"
t.string "remember_token"
t.datetime "remember_created_at"
t.integer "sign_in_count", :default => 0
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 "firstname"
t.string "lastname"
t.text "school"
t.text "major"
t.string "sex"
t.integer "zipcode"
end
add_index "users", ["email"], :name => "index_users_on_email", :unique => true
add_index "users", ["reset_password_token"], :name => "index_users_on_reset_password_token", :unique => true
create_table "weak_ins", :force => true do |t|
t.string "subject"
t.string "topic"
t.text "description"
t.datetime "created_at"
t.datetime "updated_at"
end
end