ruby-on-rails – rails 4：使用form_for,无路由,POST

通过Lynda开始学习 Ruby on Rails – 非常兴奋,并尽我所能尽力练习.我正在进行练习,但是训练是基于Rails 3 – 到现在为止,一些用途不被接受.

情况如下：

我正在达到subject / new的创建形式
填写表格
得到以下错误作为回报

No route matches [POST] “/subjects/create”

Rails.root: /Users/alpozenalp/Sites/simple_cms

我花了最近2个小时在stackoverflow,铁路指南和所有其他来源周围闲逛 – 尝试了很多变化,但无法超越这个阶段.

对你的帮助表示感谢.

的routes.rb

SimpleCms::Application.routes.draw do

root :to => "demo#index"
get ':controller(/:action(/:id(.:format)))'

end

subjects_controller.rb

class SubjectsController < ApplicationController

def index
list
render('list')
end

def list
@subjects = Subject.order("subjects.position ASC")
end

def show
@subject = Subject.find(params[:id])
end

def new
@subject = Subject.new
end

def create
# Instantiate a new object using form parameters
@subject = Subject.new(params[:subject])
# Save the object
if @subject.save
# If save succeeds, redirect to the list action
redirect_to(:action => 'list')
else
# If save fails, redisplay the form so user can fix problems
render('new')
end
end
end

new.html.erb

<%= link_to("<< Back to List", {:action => 'list'}, :class => 'back-link') %>

<div class="subject new">
  <h2>Create Subject</h2>

  <%= form_for(:subject, :url => {:action => 'create'}, :method => :post) do |f| %>

    <table summary="Subject form fields">
      <tr>
        <th>Name</th>
        <td><%= f.text_field(:name) %></td>
      </tr>
      <tr>
        <th>Position</th>
        <td><%= f.text_field(:position) %></td>
      </tr>
      <tr>
        <th>Visible</th>
        <td><%= f.text_field(:visible) %></td>
      </tr>
    </table>

    <div class="form-buttons">
      <%= submit_tag("Create Subject") %>
    </div>

  <% end %>
</div>

我已经完成了课程,我的route.rb如下所示：

Cms2::Application.routes.draw do  

root to: "public#index"
get 'admin', :to => 'access#menu'
get 'show/:id', :to => 'sections#show'
get ':controller(/:action(/:id(.:format)))'  

post "admin_users/update"
post "subjects/update"
post "pages/update"
post "sections/update"

post "subjects/destroy"
post "subjects/create"

post "pages/destroy"
post "pages/create"

post "sections/destroy"
post "sections/create"

post "admin_users/destroy"
post "admin_users/create"

post "access/attempt_login"

get "access/logout"

end

我的def创建控制器如下：

def create
#new_position = params[:subject].delete(:position)
# Instantiate a new object using form parameters
@subject = Subject.new(params.require(:subject).permit(:name, :position, :visible, :created_at, :updated_at))
# Save the object
if @subject.save
  #@subject.move_to_position(new_position)
  # If save succeeds, redirect to the list action
  flash[:notice] = "Subject Created."
  redirect_to(:action => 'list')
else
  # If save fails, redisplay the form so user can fix problems
  @subject_count = Subject.count +1
  render('new')
end
end

希望有所帮助！