如何獲得在博客上使用ruby在rails上創建文章的用戶

Question

我正在rails上編寫自己的博客。獲取在視圖上創建文章的用戶時，我被卡住了。基本上我想在我的博客應用程序中獲取創建文章（發佈）的用戶名。 我有user_id文章表中的用戶，文章表。我不知道如何獲取在應用程序中創建文章的用戶。基本上我想顯示在article/index.html頁面上創建文章的用戶的名稱（用戶名）。我試圖在文章控制器中創建文章時獲取用戶名

def create 
     @article = Article.new(params[:article]) 
     @article.user_id = current_user 
     @article.save 
     redirect_to article_path(@article) 

但無法獲得。

當前users_controller.rb爲空。

我是否需要在用戶和文章表之間進行連接，或者是否有可能無法連接到rails中。請建議我。

article/index.html。

<div class=""> 
    <title> <h2> learning experience blog </h2></title> 
</div> 

<div style="margin: 0 0 20px; padding: 20px 20px 10px; background: none repeat scroll 0 0 #82b548 ;"> 

<% @articles.each do |article| %> 
    <div style=" border-bottom: none:border: 1px solid #666666;border-radius: 1px 1px 1px 1px;margin: 0 0 20px; padding: 20px 20px 10px;height:280px; background: none repeat scroll 0 0 #FFFFFF "> 
    <div style="color:#51702E"><h2><%= article.title %></h2></div> 
    <div style="color:#666666; margin-top:10px"> <%= article.created_at %></div> 


    <hr style="border: 1px solid #FA9300;"> 
    <div style="margin-top:10px; color:"> <%= truncate(article.body, :length => 500, :separator => ' ') %></div> 
    <div style="margin-top:35px"> 
    <% if current_user.try(:is_admin) %> 
    <%= link_to "edit",edit_article_path(article), :class => 'btn btn-warning btn' %> 
    <%= link_to "delete",article_path(article),:method => :delete,:confirm => 'Are you sure?',:class => 'btn btn-danger' %> 
    <% end %> 
    <%= link_to "view more...",article_path(article), :class => 'btn btn-primary' %> 
    </div> 
    </div> 
    <% end %> 
<% if current_user.try(:is_admin) %> 
    <%= link_to "Create new Article", new_article_path, :class => 'btn btn-large btn-primary' %> 
    <% end %> 

articles_controller.rb

class ArticlesController < ApplicationController 
    def index 
     @articles = Article.all 
    end 

    def show 
     @article = Article.find(params[:id]) 
    end 

    def new 
     @article = Article.new 
    end 

    def create 
     @article = Article.new(params[:article]) 
     @article.user_id = current_user.id 
     @article.save 
     redirect_to article_path(@article) 
    end 

    def destroy 
     @article = Article.find(params[:id]) 
     @article.destroy 
     redirect_to action: 'index' 
    end 

    def edit 
     @article = Article.find(params[:id]) 
    end 

    def update 
     @article = Article.find(params[:id]) 
     @article.update_attributes(params[:article]) 
     flash.notice = "Article '#{@article.title}' Updated!" 
     redirect_to article_path(@article) 
    end 
end 

user.rb模型

class User < ActiveRecord::Base 
    has_many :articles 
    has_many :comments 
    # Include default devise modules. Others available are: 
    # :token_authenticatable, :confirmable, 
    # :lockable, :timeoutable and :omniauthable 
    devise :database_authenticatable, :registerable, 
     :recoverable, :rememberable, :trackable, :validatable 

    # Setup accessible (or protected) attributes for your model 
    attr_accessible :username, :email, :password, :password_confirmation, :remember_me 
    attr_accessible :title, :body 
end 

article_rb

class Article < ActiveRecord::Base 
    attr_accessible :title, :body 
    has_many :comments 
    belongs_to :user 
end 

schema.rb

# encoding: UTF-8 
# This file is auto-generated from the current state of the database. Instead 
# of editing this file, please use the migrations feature of Active Record to 
# incrementally modify your database, and then regenerate this schema definition. 
# 
# Note that this schema.rb definition is the authoritative source for your 
# database schema. If you need to create the application database on another 
# system, you should be using db:schema:load, not running all the migrations 
# from scratch. The latter is a flawed and unsustainable approach (the more migrations 
# you'll amass, the slower it'll run and the greater likelihood for issues). 
# 
# It's strongly recommended to check this file into your version control system. 

ActiveRecord::Schema.define(:version => 20130406120152) 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" 
    end 

    create_table "comments", :force => true do |t| 
    t.text  "content" 
    t.integer "user_id" 
    t.string "article_id" 
    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.boolean "is_admin" 
    t.datetime "created_at",        :null => false 
    t.datetime "updated_at",        :null => false 
    t.string "name" 
    t.string "username" 
    t.boolean "is_active" 
    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 

請建議我如何獲取創建文章的用戶信息。

Answer 1

我相信你有你的模型中定義的關係。

class User 
    has_many :articles 
end 


class Article 
    belongs_to :user 
end 

現在，你可以簡單地做你的replyl

a = Article.find_by_id(1) 
a.user # to get the user for Article