链接到new_deck_path时收到以下错误
No route matches {:action=>"show", :controller=>"decks", :id=>#<Deck id: nil, name: nil, created_at: nil, updated_at: nil, user_id: 3>}
我的服务器显示以下内容：
Started GET "/decks/new" for 127.0.0.1 at 2013-05-29 00:08:01 -0400
Processing by DecksController#new as HTML
User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1 [["id", 3]]
CACHE (0.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1 [["id", 3]]
Rendered decks/new.html.erb within layouts/application (2.6ms)
CACHE (0.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1 [["id", 3]]
Completed 500 Internal Server Error in 29ms
ActionController::RoutingError (No route matches {:action=>"show", :controller=>"decks", :id=>#<Deck id: nil, name: nil, created_at: nil, updated_at: nil, user_id: 3>}):
app/views/layouts/application.html.erb:51:in `_app_views_layouts_application_html_erb__3049462299863220867_2194729200'
Rendered /usr/local/rvm/gems/ruby-1.9.3-p392/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/routing_error.erb within rescues/layout (0.9ms)
为什么错误告诉我没有路线匹配？当我运行rake路线时，路线出现了。另外，为什么“show”动作会显示在错误中？正在运行的操作是#new，我可以根据服务器中的输出确认这一点。我想简单地允许用户点击“New deck”并转到New Deck页面。我无法弄清楚这里发生了什么......
application.html.erb
<body>
<div class="container-narrow">
<div class="masthead">
<ul class="nav nav-pills pull-right">
<% if signed_in? %>
<% if current_page? root_path %>
<li class=""><%= link_to "My decks", decks_path %></li>
<li class=""><%= link_to "Sign out", session_path, method: :delete %></li>
<% elsif current_page? decks_path %>
<li class="active"><%= link_to "New Deck", new_deck_path %></li>
<li class=""><%= link_to "Sign out", session_path, method: :delete %></li>
<% elsif current_page? deck_path(@deck) %>
<li class="active"><%= link_to "View decks", decks_path %></li>
<li class="active"><%= link_to "Add card", new_deck_card_path(@deck) %></li>
<li class=""><%= link_to "Sign out", session_path, method: :delete %></li>
<% else %>
<li class="active"><%= link_to "Back to #{@deck.name}", deck_path(@deck) %></li>
<li class=""><%= link_to "Sign out", session_path, method: :delete %></li>
<% end %>
<% else %>
<li><%= link_to "Sign in with Twitter", "/auth/twitter" %></li>
<li><%= link_to "Sign in", new_session_path %></li>
<li><%= link_to "Sign up", new_user_path %></li>
<% end %>
</ul>
<a href="<%= root_path %>"><h3 class="muted offset1">Flashy</h3></a>
</div>
<hr>
<%= yield %>
</body>
的routes.rb
Flashy::Application.routes.draw do
match "/auth/:provider" => redirect("http://#{DOMAIN_NAME}/auth/#{:provider}"), :as => :signin
match '/auth/:provider/callback' => 'sessions#create'
match '/signout' => 'sessions#destroy', :as => :signout
resource :session, only: [:new, :create, :destroy]
resources :users, only: [:new, :create]
resources :decks do
resources :cards, except: :index
end
root :to => "homes#index"
end
decks_controller.rb
class DecksController < ApplicationController
before_filter :authenticate
def index
@decks = current_user.decks
end
def new
@deck = current_user.decks.new
end
def show
@deck = find_deck
@cards = @deck.cards
end
def create
@deck = current_user.decks.new(params[:deck])
@deck.save
redirect_to decks_path
end
def edit
@deck = find_deck
end
def update
@deck = find_deck
@deck.update_attributes(params[:deck])
# redirect_to @deck <-- Polymorphic path
redirect_to deck_path(@deck)
end
def destroy
@deck = find_deck
@deck.destroy
redirect_to decks_path
end
private
def find_deck
current_user.decks.find(params[:id])
end
end
rake routes
root / homes#index
signin /auth/:provider(.:format) :controller#:action
/auth/:provider/callback(.:format) sessions#create
signout /signout(.:format) sessions#destroy
session POST /session(.:format) sessions#create
new_session GET /session/new(.:format) sessions#new
DELETE /session(.:format) sessions#destroy
users POST /users(.:format) users#create
new_user GET /users/new(.:format) users#new
deck_cards POST /decks/:deck_id/cards(.:format) cards#create
new_deck_card GET /decks/:deck_id/cards/new(.:format) cards#new
edit_deck_card GET /decks/:deck_id/cards/:id/edit(.:format) cards#edit
deck_card GET /decks/:deck_id/cards/:id(.:format) cards#show
PUT /decks/:deck_id/cards/:id(.:format) cards#update
DELETE /decks/:deck_id/cards/:id(.:format) cards#destroy
decks GET /decks(.:format) decks#index
POST /decks(.:format) decks#create
new_deck GET /decks/new(.:format) decks#new
edit_deck GET /decks/:id/edit(.:format) decks#edit
deck GET /decks/:id(.:format) decks#show
PUT /decks/:id(.:format) decks#update
DELETE /decks/:id(.:format) decks#destroy
application_controller.rb
class ApplicationController < ActionController::Base
protect_from_forgery
def current_user
if cookies[:user_id]
user_id = cookies.signed[:user_id]
User.find_by_id(user_id)
else
User.find(session[:user_id]) if session[:user_id]
end
end
helper_method :current_user
end
sessions_controller.rb
class SessionsController < ApplicationController
def new
end
def create
if !request.env["omniauth.auth"].nil?
auth = request.env["omniauth.auth"]
user = User.find_by_provider_and_uid(auth["provider"], auth["uid"]) || User.create_with_omniauth(auth)
session[:user_id] = user.id
else
user = User.find_by_email(params[:session][:email])
sign_in(user)
cookies.signed[:user_id] = user.id
end
redirect_to decks_path
end
def destroy
if cookies[:user_id].nil?
session[:user_id] = nil
else
cookies.delete(:user_id)
end
redirect_to root_path, notice: "Signed out!"
end
end
答案 0 :(得分：0)
我认为这会导致错误，对吧？
<li class="active"><%= link_to "Back to #{@deck.name}", deck_path(@deck) %></li>
您尝试使用nil id
答案 1 :(得分：0)
@deck正在生成错误，因为它尚未保存。我通过在视图中而不是在布局中放置content_for辅助方法来解决问题。
<% content_for :nav do %>
<li class="active"><%= link_to "New Deck", new_deck_path %></li>
<% end %>
<div class="masthead">
<ul class="nav nav-pills pull-right">
<% if signed_in? %>
<%= yield :nav %>
<% else %>
<li><%= link_to "Sign in with Twitter", "/auth/twitter" %></li>
<li><%= link_to "Sign in", new_session_path %></li>
<li><%= link_to "Sign up", new_user_path %></li>
<% end %>
</ul>
<a href="<%= root_path %>"><h3 class="muted offset1">Flashy</h3></a>
</div>