ruby on rails 创建一个博客项目_如何创建一个博客

ruby on rails 创建一个博客项目由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“如何创建一个博客”。

控制台创建一个博客项目

rails new blog

cd blog

rails g scaffold post title:string text:text

rails g model comment post_id:integer text:text

rake db:migrate

rails s

测试:http://localhost:3000/posts

修改index.html.erb

blog/app/views/posts/index.html.erb 删除原有的内容，新的内容如下：

1.2.3.4.5.6.7.8.9.10.> 11.

来源： http://blog.csdn.net/pan_tian/article/details/8763627 <%= @post.title %>

<%= @post.text %>

<%= link_to “Back”, posts_path %> |

<%= link_to “Edit”, edit_post_path(@post)%> |

<%= link_to “Delete”,@post,:method => :delete, :confirm => “Are you sure?” %

增加Comments项 继续修改show.html.erb blog/app/views/posts/show.html.erb 1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.> <%= @post.title %>

<%= @post.text %>

Comments

<% @post.comments.each do |comment| %>

<%= comment.text %>

<%= time_ago_in_words comment.created_at %> ago

<%= form_for [@post,@post.comments.build] do |f| %>

<%= f.text_area :text, :size => '40x10' %>

<%= f.submit “Post Comment” %>

<%= link_to “Back”, posts_path %> |

<%= link_to “Edit”, edit_post_path(@post)%> |

<%= link_to “Delete”,@post,:method => :delete, :confirm => “Are you sure?” %23.

1.2.修改blog/app/models/post.rb 增加

has_many :comments

修改blog/app/models/comment.rb 增加 belongs_to :post 修改blog/config/routes.rb

1.2.3.resources :posts do

resources :comments

end

这个时候Comment就出来了，但是如果提交comment，还会报错，因为我们还没写comment的controller 打开一个新的命令行 D:Rubyprojects>cd blog

D:Rubyprojectsblog>rails g controller comments create destroy

打开新创建的blogappcontrollerscomments_controller.rb

1.cla CommentsController

5.6.7.8.9.def create

@post = Post.find(params[:post_id])@comment = @post.comments.build(comment_params)@comment.save

redirect_to @post end

def comment_params

params.require(:comment).permit(:id, :text)end

10.11.def destroy

end

12.13.end

14.15.增加删除comment功能

修改blog/app/views/posts/show.html.erb(增加Delete Comment链接)1.2.3.4.5.<%= @post.title %>

<%= @post.text %>

Comments 6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.ure?“ %> 24.<% @post.comments.each do |comment| %>

<%= comment.text %>

<%= time_ago_in_words comment.created_at %> ago

<%= link_to ”Delete Comment“, [@post, comment], :method => :delete, :confirm => ”Are you sure?“ %>

<% end %>

<%= form_for [@post,@post.comments.build] do |f| %>

<%= f.text_area :text, :size => '40x10' %>

<%= f.submit ”Post Comment“ %>

<%= link_to ”Back“, posts_path %> |

<%= link_to ”Edit“, edit_post_path(@post)%> |

<%= link_to ”Delete“,@post,:method => :delete, :confirm => ”Are you s

修改blogappcontrollerscomments_controller.rb cla CommentsController

def create

@post = Post.find(params[:post_id])

@comment = @post.comments.build(comment_params)

@comment.save

redirect_to @post

end

def destroy

@comment = Comment.find(params[:id])

@comment.destroy

redirect_to @comment.post

end end

def comment_params params.require(:comment).permit(:id, :text)end

给你的blog添加ATOM feed

修改blogappcontrollersposts_controller.rb def index @posts = Post.all

respond_to do |format| format.html # index.html.erb format.json { render json: @posts } format.atom

end end 修改blogappviewslayoutsapplication.html.erb header区域中添加下面的代码，用于显示Atom的图标 <%= auto_discovery_link_tag :atom, “/posts.atom” %>

一个博客就基本完成了。