嗨，我正在学习 Rails 教程，但我已经偏离了教程去做一些不同的事情......我遇到了障碍。因此本教程（michael hartl's）创建了一个微博提要，但它并没有为每个微博提供自己的页面。这就是我正在尝试做的事情，但似乎无法让它发挥作用。
所以在我称之为“活动”的提要视图中，我得到了：
<li id="<%= activity_item.id %>">
<%= link_to gravatar_for(activity_item.user, :size => 200), activity_item.user %><br clear="all">
<span class="title"><%= link_to activity_item.title, @micropost %></span><br clear="all">
<span class="user">
Joined by <%= link_to activity_item.user.name, activity_item.user %>
</span><br clear="all">
<span class="timestamp">
<%= time_ago_in_words(activity_item.created_at) %> ago.
</span>
<% if current_user?(activity_item.user) %>
<%= link_to "delete", activity_item, :method => :delete,
:confirm => "Are you sure?",
:title => activity_item.content %>
<% end %>
</li>
当我点击实际的微博“标题”时，我收到以下错误消息，说我有“没有路线匹配 [GET]”/microposts”。我确信这可能是我缺少的一个简单的修复，但我'我是一个初学者，我已经太久了，我的大脑被炸了。
我基本上需要发生的是，当我从我的活动提要中单击微博的标题时...我需要它转到该微博 ID 的唯一 #show 页面。
以下是我认为相关的模型/控制器。如果我需要发布其他任何内容，请告诉我。我感谢任何和所有的帮助！谢谢！
static_pages_controller（主页是我的活动提要显示的地方
class StaticPagesController < ApplicationController
def home
if signed_in?
@micropost = current_user.microposts.build
@activity_items = current_user.activity.paginate(:page => params[:page])
@friendactivity_items = current_user.friendactivity.paginate(:page => params[:page])
end
end
def help
end
def about
end
def contact
end
end
微博控制器
class MicropostsController < ApplicationController
before_filter :signed_in_user, :only => [:create, :destroy]
before_filter :correct_user, :only => :destroy
def index
end
def new
@micropost = current_user.microposts.build if signed_in?
end
def create
@micropost = current_user.microposts.build(params[:micropost])
if @micropost.save
flash[:success] = "Micropost created!"
redirect_to root_path
else
@activity_items = [ ]
render 'new'
end
end
def show
@micropost = Micropost.find(params[:id])
@users = @micropost.users.paginate(:page => params[:page])
end
def destroy
@micropost.destroy
redirect_to root_path
end
private
def correct_user
@micropost = current_user.microposts.find_by_id(params[:id])
redirect_to root_path if @micropost.nil?
end
end
微柱模型
class Micropost < ActiveRecord::Base
attr_accessible :content, :title
belongs_to :user
validates :title, :presence => true, :length => { :maximum => 100 }
validates :content, :presence => true, :length => { :maximum => 220 }
validates :user_id, :presence => true
default_scope :order => 'microposts.created_at DESC'
# Returns Microposts from the users that the given user follows
def self.from_users_followed_by(user)
followed_user_ids = "SELECT followed_id FROM relationships
WHERE follower_id = :user_id"
where("user_id IN (#{followed_user_ids})",
:user_id => user.id)
end
end
我现在还按要求添加了 routes.rb 文件和 micropost 模型
路线.rb
SampleApp::Application.routes.draw do
resources :users do
member do
get :following, :followers
end
end
resources :sessions, :only => [:new, :create, :destroy]
resources :microposts, :only => [:create, :destroy, :show]
resources :relationships, :only => [:create, :destroy]
# home page route
root :to => 'static_pages#home'
# signup route
match '/signup', :to => 'users#new'
match '/signin', :to => 'sessions#new'
match '/signout', :to => 'sessions#destroy', :via => :delete
# static pages routes
match '/help', :to => 'static_pages#help'
match '/about', :to => 'static_pages#about'
match '/contact', :to => 'static_pages#contact'
# create a micropost routes
match '/createamicropost', :to => 'microposts#new'
微博模型按要求...谢谢！
class Micropost < ActiveRecord::Base
attr_accessible :content, :title
belongs_to :user
validates :title, :presence => true, :length => { :maximum => 100 }
validates :content, :presence => true, :length => { :maximum => 220 }
validates :user_id, :presence => true
default_scope :order => 'microposts.created_at DESC'
# Returns Microposts from the users that the given user follows
def self.from_users_followed_by(user)
followed_user_ids = "SELECT followed_id FROM relationships
WHERE follower_id = :user_id"
where("user_id IN (#{followed_user_ids})",
:user_id => user.id)
end
end