Question

模型“项目”由脚手架生成。

config / routes.rb包含行资源：projects。

我有一个从索引视图到new_project_path的链接。

问题在于/ new的链接。 url application / project / new出现以下错误：

没有路线匹配{：action =＆gt;“show”，：controller =＆gt;“projects”}

它工作但现在不工作，我不知道为什么。有什么想法吗？

class ProjectsController < ApplicationController
  # GET /projects
  # GET /projects.json
  def index
    @projects = Project.paginate(:page=>params[:page],:per_page=>15)

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @projects }
    end
  end

  # GET /projects/1
  # GET /projects/1.json
  def show
    @project = Project.find(params[:id])
    @tasks=@project.tasks.paginate(:page=>params[:page],:per_page=>15)

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @project }
    end
  end

  # GET /projects/new
  # GET /projects/new.json
  def new
    @project = Project.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @project }
    end
  end

  # GET /projects/1/edit
  def edit
    @project = Project.find(params[:id])
  end

  # POST /projects
  # POST /projects.json
  def create
    @project = Project.new(params[:project])

    respond_to do |format|
      if @project.save
        format.html { redirect_to projects_path, notice: 'Project was successfully created.' }
        format.json { render json: @project, status: :created, location: @project }
      else
        format.html { render action: "new" }
        format.json { render json: @project.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /projects/1
  # PUT /projects/1.json
  def update
    @project = Project.find(params[:id])

    respond_to do |format|
      if @project.update_attributes(params[:project])
        format.html { redirect_to @project, notice: 'Project was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @project.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /projects/1
  # DELETE /projects/1.json
  def destroy
    @project = Project.find(params[:id])
    @project.destroy

    respond_to do |format|
      format.html { redirect_to projects_url }
      format.json { head :no_content }
    end
  end

  def sort_tasks
    project = Project.find(params[:id])
    tasks = project.tasks
    tasks.each do |task|
      task.position = params['task'].index(task.id.to_s) + 1
      task.save
    end
    render :nothing => true
  end

end

routes.rb中：

Taska::Application.routes.draw do
  resources :projects
  resources :tasks

  root :to => 'projects#index'

  match ':controller(/:action(/:id))(.:format)'
end

_form.html.erb：

<%= form_for @project, :html => { :class => 'form-horizontal' } do |f| %>
  <div class="control-group">
    <%= f.label :title, :class => 'control-label' %>
    <div class="controls">
      <%= f.text_field :title, :class => 'text_field' %>
    </div>
  </div>
  <div class="control-group">
    <%= f.label :description, :class => 'control-label' %>
    <div class="controls">
      <%= f.text_area :description, :class => 'text_area', rows: 5 %>
    </div>
  </div>

  <div class="form-actions">
    <%= f.submit nil, :class => 'btn btn-primary' %>
    <%= link_to t('.cancel', :default => t("helpers.links.cancel")),
                project_path(@project), :class => 'btn' %>
  </div>
<% end %>

index.htm.erb：

<%- model_class = Project -%>
<div class="page-header">
  <h3><%=t '.title', :default => model_class.model_name.human.pluralize %></h3>
  <%= link_to t('.new', :default => t("helpers.links.new")),
              new_project_path,
              :class => 'btn btn-primary' %>
</div>

<table class="table table-striped">
  <thead>
    <tr>
      <th><%= model_class.human_attribute_name(:title) %></th>
      <th>Tasks count</th>
      <th>Updated at</th>
    </tr>
  </thead>
  <tbody>

    <% @projects.each do |project| %>
      <tr>
        <td><%= link_to project.title, project_path(project) %></td>
        <td><%= project.tasks.size %></td>
        <td><%= project.updated_at %></td>
      </tr>

    <% end %>

  </tbody> 

</table>
<%= will_paginate @projects %>

show.html.erb：

<%- model_class = Project -%>
<div class="page-header">
  <h1><%=t '.title', :default => @project.title %></h1>
  <h4><%= @project.description %></h4>
  <%= link_to t('.edit', :default => t("helpers.links.edit")),
                      edit_project_path(@project), :class => 'btn btn-primary' %>
          <%= link_to t('.destroy', :default => t("helpers.links.destroy")),
                      project_path(@project),
                      :method => :delete,
                      :data => { :confirm => t('.confirm', :default => t("helpers.links.confirm", :default => 'Are you sure?')) },
                      :class => 'btn btn-primary btn-danger' %>

<h2>Tasks:</h2>

<%= link_to t('.new', :default => t("helpers.links.new")),
            new_task_path(:project_id => @project),
            :class => 'btn btn-primary' %>
</div>

<table class="table table-striped">
  <thead>
  <tr>
    <th></td>
    <th><%= model_class.human_attribute_name(:type) %></th>
    <th><%= model_class.human_attribute_name(:title) %></th>
    <th><%= model_class.human_attribute_name(:status) %></th>
    <th><%= model_class.human_attribute_name(:updated_at) %></th>
  </tr>
  </thead>
  <tbody id="tasks_list">
  <% @tasks.each do |task| %>
      <tr id="task_<%= task.id %>" class="handle" >
        <td><%= link_to "open task",task_path(task) %></td>
        <td><%= task.type.name %></td>
        <td><%= task.title %></td>
        <td><%= task.status.name %></td>
        <td><%= task.updated_at %></td>
      </tr>
  <% end %>
  </tbody>
</table>
<%= will_paginate @tasks %>
<input type="hidden" id="project_id" value='<%=@project.id%>'>

new.html.erb：

<%- model_class = Project -%>
<div class="page-header">
  <h1>New project</h1>
</div>
<%= render :partial => 'form' %>

Answer 1

您可能想写_form.html.rb：

  ...
  <div class="form-actions">
    <%= f.submit nil, :class => 'btn btn-primary' %>
    <%= link_to t('.cancel', :default => t("helpers.links.cancel")),
                projects_path, :class => 'btn' %>
  </div>
<% end %>

（将project_path(@project)更改为projects_path以转到索引页。）

您尝试链接到不在数据库中的对象的显示页面。错误消息想要说的是“你告诉我链接到节目页面，但我没有身份证明。”我承认这很令人困惑。

Answer 2

您是否尝试重启服务器？

如果您想确定某些路线是否正在出现或您可以使用哪条路线，请在控制台中运行：

rake routes

如果它列出了到projects / show的路由，那么你可能只需要重启服务器。但如果不是，问题可能在于拼写，或者即使您在路线中更改了match

修改

我刚刚注意到，在项目控制器内的新操作中，你已经做出了回应

respond_to do |format| format.html # new.html.erb format.json { render json: @project } end

删除这些行。它应该看起来像：

def new @project = Project.new end

编辑2：

我意识到你想做什么。我可以看到你是初学者，所以我可以假设你想在新动作中创建新对象，并将其转移到新表单，并在你点击'取消'时返回到新项目，但这不是rails功能。您不应该在您的操作中使用@project对象并将其响应到html。从新行动中使用@project会导致所有问题。从操作中删除@project，并在新操作中使用@project（在视图中也是如此）

Answer 3

正如chris所指出的那样，你的取消链接指向一个错误的动作，它正在寻找一个不存在的/ projects / show。

“show”具有projects /：id / show的格式，恰好是成员路由。 Show是类型成员的继承资源。这是错误！

Answer 4

如果你的＆＃34; _form.html.rb＆＃34;也被＆＃34; edit.html.erb＆＃34;使用，您可以重写如下：

  ...
  <div class="form-actions">
    <%= f.submit nil, :class => 'btn btn-primary' %>
    <%= link_to t('.cancel', :default => t("helpers.links.cancel")),
            (@project.id.nil? ? projects_path : project_path(@project)), :class => 'btn' %>
  </div>
<% end %>

如果您编辑表projects中id = 10020的现有记录，则url helper project_path(@project)可以生成

<a href="/projects/10020" class="btn">Cancel</a>

在html中。

如果您要创建新的，则网址助手projects_path可以生成

<a href="/projects" class="btn">Cancel</a>

在html中。

Rails路由错误：action =＆gt; 'new'返回错误“无路由与控制器中的{：action =＆gt;”show“匹配

4 个答案: