没有路线匹配[POST]“/ projects / 16 / todos / 35 / edit”

Question

我收到了这个错误

没有路线匹配[POST]“/ projects / 16 / todos / 35 / edit”

我知道我不必为此设置方法，但如何添加它

这是routes.rd

Rails.application.routes.draw do
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
  get 'projects/index'
  post 'projects/new'

  resources :projects do
    resources :todos
end
  root 'projects#index'
end

这是edit.html.erb（用于任务）

<h1>Edit Task</h1>

<%= form_for :todo, local: true do |form| %>
  <p>

    <%= form.label :body %><br>
    <%= form.text_field :body %>
  </p>

  <div>
<%= form.submit%>
  </div>
<% end %>

这是todos_controller.rb

class TodosController < ApplicationController

  def new
    @project = Project.find(params[:project_id])
  end

  def create
    @project = Project.find(params[:project_id])
    @todo = @project.todos.create(todos_params)
    redirect_to projects_path
  end

  def edit
    @project = Project.find(params[:project_id])
    @todo = @project.todos.find(params[:id])
  end

  def update
    @project = Project.find(params[:project_id])
    @todo = @project.todos.find(params[:id])
    @todo.save
  end

def destroy
  @project = Project.find(params[:project_id])
  @todo = @project.todos.find(params[:id])
  @todo.destroy
  redirect_to projects_path
end

  private
    def todos_params
      params.require(:todo).permit(:body)
    end
end

请帮助解决这个问题

Answer 1

正如您在此处所看到的，触发的请求是POST请求，而应该是GET请求

收到此错误没有路由匹配[POST]“/ projects / 16 / todos / 35 / edit”

确保在单击“编辑TODO”时触发GET请求。

定义路线

resources :projects do
    resources :todos
end

是

 project_todos GET    /projects/:project_id/todos(.:format)          todos#index
                  POST   /projects/:project_id/todos(.:format)          todos#create
 new_project_todo GET    /projects/:project_id/todos/new(.:format)      todos#new
edit_project_todo GET    /projects/:project_id/todos/:id/edit(.:format) todos#edit
     project_todo GET    /projects/:project_id/todos/:id(.:format)      todos#show
                  PUT    /projects/:project_id/todos/:id(.:format)      todos#update
                  DELETE /projects/:project_id/todos/:id(.:format)      todos#destroy

因此，您可以在link_to中使用rails视图帮助程序edit_project_todo（project，todo）来编辑TODO以触发GET请求。

Answer 2

在您的edit.html.erb中

<h1>Edit Task</h1>

<%= form_for @todo, :url => project_todo_path(@project,@todo), :html => { class: "your_class", :method => "put" } do |form| %>
  <p>
    <%= form.label :body %><br>
    <%= form.text_field :body %>
  </p>

  <div>
    <%= form.submit%>
  </div>
<% end %>

注意： - form_for用于任何对象，并且在这里你的对象是@todo而不是todo，默认情况下form_for命中create动作如果@todo是新的，如果@todo是现有记录那么它将命中更新动作，这里明确你可以提供url到提交表格后会触及哪个动作。所以在这里我手动提供更新的动作，并提供method: :put，因为默认情况下form是POST类型请求。希望它能清除你的怀疑。