Ruby on rails 3 路由错误-尝试访问新路径时没有匹配的路由

链接到新的\u deck\u路径时，我收到以下错误

No route matches {:action=>"show", :controller=>"decks", :id=>#<Deck id: nil, name: nil, created_at: nil, updated_at: nil, user_id: 3>}

C.U控制器.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

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

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

应用程序\u 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

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

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

class ApplicationController

会话\u 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

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

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

class sessioncontroller

我认为这会导致错误，对吗

<li class="active"><%= link_to "Back to #{@deck.name}", deck_path(@deck) %></li>

---

您尝试使用

nil

id

链接以显示操作@deck正在生成错误，因为它尚未保存。我通过将content_for helper方法放置在视图中而不是布局中解决了这个问题

<% 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>

这似乎不是问题所在。我删除了该行，但它仍然产生错误。而且，这句话永远也不会让他明白。if/else语句停止在：