如何显示各个微博的链接？ （红宝石在轨道上3）

Question

I followed a rails 3 tutorial and I'm trying to get this to work correctly.

All microposts that a user make is listed in http://localhost:3000/users/username

UsersController

def show
    @user = User.find(params[:id])
    @microposts = @user.microposts.paginate page: params[:page], :per_page => 15
    end

Each micropost has an ID

create_table "microposts", :force => true do |t|
    t.text     "content"
    t.integer  "user_id"
    t.datetime "created_at",                         :null => false
    t.datetime "updated_at",                         :null => false
    t.string   "image"
    t.text     "comment_content"
  end

How can I set it up so that a link such as http://localhost:3000/users/username/micropost_id (if valid) will lead to page that has just that micropost?

I want the display to be exactly the same except show up individually on a new page.

Users table

create_table "users", :force => true do |t|
    t.string    "name"
    t.string    "email"
    t.timestamp "created_at",                         :null => false
    t.timestamp "updated_at",                         :null => false
    t.string    "password_digest"
    t.string    "remember_token"
  end

My config routes

MyApp::Application.routes.draw do
  resources :authentications

resources :microposts, :path => "posts"


root to: 'static_pages#home'

            ActiveAdmin.routes(self)


  resources :users do
    member do
      get :following, :followers
    end
  end
  resources :sessions, only: [:new, :create, :destroy]
  resources :microposts, only: [:create, :destroy]
  resources :relationships, only: [:create, :destroy]
  resources :microposts do
  resources :postcomments

end


  match '/signup',   to: 'users#new'
  match '/signin',   to: 'sessions#new'
  match '/signout',  to: 'sessions#destroy', via: :delete

  match '/post',    to: 'static_pages#post'
  match '/about',   to: 'static_pages#about'
  match '/contact', to: 'static_pages#contact'
  match '/users/:username/:id', to: 'microposts#show', via: :get, as: :user_micropost
end

Answer 1

You should add a new route to your routes.rb file like the following:

match '/users/:username/:id', to 'microposts#show', via: :get, as: :user_micropost

and on the page that shows user's microposts, add the link as:

<a href="<%= user_micropost_path(username: @user.username, id: micropost.id) %>">Whatever..</a>

On the microposts controller, add the method show:

def show
  @user = User.find_by_username(params[:username])
  @post = Post.find_by_id(params[:id])
  # handle any errors from the code above
end

and create under

app/views/microposts/show.html.erb

the new page that will display the micropost.

Answer 2

I guess in your routes you have mention something like this

resources :users do
    resources :microposts
end

In that case you can create a link in your /views/users/show.html.erb , something like this

<% @microposts.each do |post|
   <%= link_to truncate(post.content, :length => 10, :separator => '...'), user_micropost_path(@user, post) %>
<% end %>