Rails ブログの作成に関するチュートリアル ( http://www.roberthuberdeau.com/articles/4-How-to-create-a-blog-in-Ruby-on-Rails-3 ) に従っていますが、基本的には最後までたどり着きました。
しかし、すべての移行の後、私は今苦労しています。以前に記事を作成するために使用したフォームに記入しても、インデックス ページに表示されません。私は掘り下げて、エラーの根本は、「記事の作成」を押したときに記事を保存していないことだと信じています.
これをテストするために、コンソールを使用して記事を作成しましたが、これは正常に表示されているため、問題は記事を作成するフォームとコントローラーの間のどこかにあると思います (ただし、これで修正されてうれしいです)。
試行するたびに、ログに次のように表示されます。
Started POST "/articles" for 127.0.0.1 at 2013-04-01 21:12:58 +0100
Processing by ArticlesController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"XLeHm+4Tgd6n9vt4RxAQ5YVTbWTi+UnqkmBso9Iuo+4=", "article"=>{"title"=>"I rule", "body"=>"Change teams.", "tag_names"=>"kill", "published"=>"1"}, "commit"=>"Create Article"}
User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 LIMIT 1
Role Load (0.1ms) SELECT "roles".* FROM "roles" INNER JOIN "roles_users" ON "roles"."id" = "roles_users"."role_id" WHERE "roles_users"."user_id" = 1 AND "roles"."name" = 'Admin' LIMIT 1
Role Load (0.1ms) SELECT "roles".* FROM "roles" INNER JOIN "roles_users" ON "roles"."id" = "roles_users"."role_id" WHERE "roles_users"."user_id" = 1 AND "roles"."name" = 'Moderator' LIMIT 1
Role Load (0.1ms) SELECT "roles".* FROM "roles" INNER JOIN "roles_users" ON "roles"."id" = "roles_users"."role_id" WHERE "roles_users"."user_id" = 1 AND "roles"."name" = 'Member' LIMIT 1
Redirected to http://localhost:3000/
Completed 302 Found in 5ms (ActiveRecord: 0.5ms)
データベース スキーマの場合:
ActiveRecord::Schema.define(:version => 20130401171646) do
create_table "articles", :force => true do |t|
t.string "title"
t.text "body"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
t.integer "user_id", :null => false
t.boolean "published", :default => false
end
create_table "comments", :force => true do |t|
t.integer "article_id"
t.string "name"
t.string "email"
t.text "body"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end
create_table "roles", :force => true do |t|
t.string "name"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end
create_table "roles_users", :id => false, :force => true do |t|
t.integer "role_id"
t.integer "user_id"
end
create_table "taggings", :force => true do |t|
t.integer "article_id"
t.integer "tag_id"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end
create_table "tags", :force => true do |t|
t.string "name"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end
create_table "users", :force => true 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
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
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
end
記事コントローラー:
class ArticlesController < ApplicationController
before_filter :authenticate_user!, :except => [:index, :show]
# GET /articles
# GET /articles.xml
def index
@articles = Article.published.page(params[:page]).per(5).ordered
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => @articles }
end
end
# GET /articles/1
# GET /articles/1.xml
def show
@article = Article.find(params[:id])
@comment = Comment.new(:article=>@article)
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => @article }
end
end
# GET /articles/new
# GET /articles/new.xml
def new
@article = Article.new
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => @article }
end
end
# GET /articles/1/edit
def edit
@article = Article.find(params[:id])
authorize! :edit, @article
end
# POST /articles
# POST /articles.xml
def create
authorize! :create, @article
@article = Article.new(params[:article])
@article.user_id = current_user.id
respond_to do |format|
if @article.save
format.html { redirect_to(@article, :notice => 'Article was successfully created.') }
format.xml { render :xml => @article, :status => :created, :location => @article }
else
format.html { render :action => "new" }
format.xml { render :xml => @article.errors, :status => :unprocessable_entity }
end
end
end
# PUT /articles/1
# PUT /articles/1.xml
def update
@article = Article.find(params[:id])
authorize! :update, @article
respond_to do |format|
if @article.update_attributes(params[:article])
format.html { redirect_to(@article, :notice => 'Article was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => @article.errors, :status => :unprocessable_entity }
end
end
end
# DELETE /articles/1
# DELETE /articles/1.xml
def destroy
@article = Article.find(params[:id])
authorize! :destroy, @article
@article.destroy
respond_to do |format|
format.html { redirect_to(articles_url) }
format.xml { head :ok }
end
end
end
記事モデル:
class Article < ActiveRecord::Base
attr_accessible :body, :title, :tag_names
has_many :comments, :dependent => :destroy
has_many :taggings, :dependent => :destroy
has_many :tags, :through => :taggings
validates_presence_of :title, :body
validates_uniqueness_of :title
attr_writer :tag_names
after_save :assign_tags
validates_numericality_of :user_id
belongs_to :user
scope :published, lambda {{:conditions => ['published = ?', true]}}
scope :ordered, lambda {{:order => "Created_at DESC" }}
def tag_names
@tag_names || tags.map(&:name).join(' ')
end
private
def assign_tags
if @tag_names
self.tags = @tag_names.split(/\,/).map do |name|
Tag.find_or_create_by_name(name)
end
end
end
end
そして、記事を作成するために使用されるフォーム部分:
<%= form_for(@article) do |f| %>
<% if @article.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@article.errors.count, "error") %> prohibited this article from being saved:</h2>
<ul>
<% @article.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :title %><br />
<%= f.text_field :title %>
</div>
<div class="field">
<%= f.label :body %><br />
<%= f.text_area :body %>
</div>
<div class="field">
<%= f.label :tag_names, "Tags" %>
<%= f.text_field :tag_names %>
</div>
<div class="field">
<%= check_box("article", "published" ) %>
<%= "Publish article" %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
これについてあなたが私に与えることができるどんな助けも大歓迎です.
リクエストにより：
アビリティ.rb
class Ability
include CanCan::Ability
def initialize(user)
user ||= User.new # guest user
if user.role? :Admin
can :manage, :all
can :publish, Article
elsif user.role? :Moderator
can :read, [Article, Comment]
can [:edit, :update], Comment
elsif user.role? :Member
can :read, :all
can :create, [Article, Comment]
can [:edit, :update], Comment
end
end
end
ps私が見ることができる唯一の他のエラーは、記事（show.html.erb）を表示しようとすると、次のエラーが表示されることです：
Processing by ArticlesController#show as HTML
Parameters: {"id"=>"1"}
Article Load (0.2ms) SELECT "articles".* FROM "articles" WHERE "articles"."id" = ? LIMIT 1 [["id", "1"]]
Completed 500 Internal Server Error in 44ms
ActiveModel::MassAssignmentSecurity::Error (Can't mass-assign protected attributes: article):
app/controllers/articles_controller.rb:18:in `new'
app/controllers/articles_controller.rb:18:in `show'