Question

    I getting the following error while I am accessing my new method like http://127.0.0.1:3000/book/new

我的项目名称是LibraryWebProject我正在使用带有rails插件的Eclipse

routes.rb文件是

    LibraryWebProject::Application.routes.draw do
      get 'book/new'
      get 'book/list'
      get 'book/edit'
      get 'book/show_subjects'
      get 'book/show'
    end

我的控制器是

book_controller.rb控制器包含所有方法。我使用的是Mysql数据库，gem是mysql2

    class BookController < ApplicationController
       def list
          @books = Book.find(:all)
       end
       def new
          @book = Book.new
          @subjects = Subject.find(:all)
       end
       def create
          @book = Book.new(params[:book])
          if @book.save
                redirect_to :action => 'list'
          else
                @subjects = Subject.find(:all)
                render :action => 'new'
          end
       end
       def edit
          @book = Book.find(params[:id])
          @subjects = Subject.find(:all)
       end

       end


    end

我的new.erb文件是

<h1>Add new book</h1>
<%= form_tag :action => 'create' %>
<p><label for="book_title">Title</label>:
<%= text_field 'book', 'title' %></p>
<p><label for="book_price">Price</label>:
<%= text_field 'book', 'price' %></p>
<%= submit_tag "Create" %>
<%= end_form_tag %>
<%= link_to 'Back', {:action => 'list'} %>

我正在使用Rails4.0.3

最后错误是

No route matches {:action=>"create", :controller=>"book"}
Extracted source (around line #2):
  <h1>Add new book</h1>
  <%= form_tag :action => 'create' %>
  <p><label for="book_title">Title</label>:
  <%= text_field 'book', 'title' %></p>
  <p><label for="book_price">Price</label>:

Rails.root：D：/ RailsAppsExamples / LibraryWebProject

Application Trace | Framework Trace | Full Trace
actionpack (4.0.3) lib/action_dispatch/journey/formatter.rb:39:in `generate'
actionpack (4.0.3) lib/action_dispatch/routing/route_set.rb:601:in `generate'

..................... 什么是无路线匹配的意思我无助于找到这个和新的铁路以及红宝石的解决方案

Answer 1

您的路线错误

只需替换为

LibraryWebProject::Application.routes.draw do
  resources :books
end

Book＃new中的ActionController :: UrlGenerationError

1 个答案: