Question

我有一个带有页面的rails应用程序，供用户编辑自己的个人资料

app/views/manage_users/edit.html.erb和app/views/manage_users/new.html.erb包含：

<%= render 'form' %>

app/views/manage_users/_formt.html.erb包含：

<%= form_for(@user, :as => :user, :url => {:action => @form_action, :id => @user.id}) do |f| %>

当我启动页面http://localhost:3000/manage_users/2/edit时，它会显示一个编辑用户对象数据的典型表单。如果我删除电子邮件地址http://snag.gy/atnmV.jpg并提交表单，则会收到错误消息，我预计会http://snag.gy/NRfwn.jpg，而网址现在为http://localhost:3000/manage_users/2：

Started PUT "/manage_users/2" for 127.0.0.1 at 2014-01-25 21:01:45 -0600
Processing by ManageUsersController#update as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"B44/1b5m8usyAfe0hzLHNyjk/7Fpn5iEu3u6wGJMGL0=", "user"=>{"user_details_attributes"=>{"first_name"=>"Jeff", "last_name"=>"Smith", "id"=>"2"}, "email"=>"", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}, "button"=>"", "id"=>"2"}

如果我重新输入电子邮件地址并提交表单，则网址现在指向http://localhost:3000/manage_users?id=2，我收到错误No route matches [PUT] "/manage_users"

为什么要这样做以及如何解决它。如果我只是去初始页面编辑用户并立即保存（而不是删掉电子邮件），一切正常。

应用程序/控制器/ manage_users_controller.rb

class ManageUsersController < ApplicationController

  before_filter :admin_only, :except => [:edit, :update]

  # GET /manage_users
  # GET /manage_users.json
  def index
    @users = User.active

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

  # GET /manage_users/new
  # GET /manage_users/new.json
  def new
    @user = User.new
    @user.build_user_details
    @form_action = 'create'

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

  # GET /manage_users/1/edit
  def edit
    @user = User.find(params[:id])
    @permissions_disabled = params[:id].to_i == current_user.id.to_i
    #p @permissions_disabled
    able_to_edit_profile?

    session[:return_to] ||= request.referer

    @form_action = 'update'
  end

  # POST /manage_users
  # POST /manage_users.json
  def create
    @user = User.new(params[:user])

    #p "in create"
    respond_to do |format|
      if @user.save
        format.html { 
            flash[:notice] = 'User was successfully created.'
            redirect_to(:action => :index) 
        }
        format.json { render json: @user, status: :created, location: @user }
      else
        format.html { render action: "new", notice: 'Error creating user.' }
        format.json { render json: @user, status: :unprocessable_entity }
        end
     end
  end

  # PUT /manage_users/1
  def update
    @user = User.find(params[:id])
    able_to_edit_profile?

    # required for settings form to submit when password is left blank
    if params[:user][:password].blank?
      params[:user].delete("password")
      params[:user].delete("password_confirmation")
    end

    respond_to do |format|
      if @user.update_attributes(params[:user])
        @user.save    

        # sign the user in with their new password so it doesn't redirect to the login screen
        if current_user == @user
          sign_in @user, :bypass => true
        end

        format.html { 
        p "in success format.html"
            flash[:notice] = 'User was successfully updated.'
            redirect_to session.delete(:return_to)
        }
      else
      p "in else"
        format.html { render action: "edit", notice: 'Error updating user.' }
        #format.html { 

            #flash[:notice] = @user.errors
        #   redirect_to edit_manage_user_path(@user)
        #}
      end
    end
  end

  private 

  # If the user is not an admin and trying to edit someone else's profile, redirect them
  def able_to_edit_profile?
    if !current_user.try(:admin?) && current_user.id != @user.id
        flash[:alert] = "That area is for administrators only."
        redirect_to :root
    end
  end
end

修改

所以改变这个：

format.html { render action: "edit", notice: 'Error updating user.' }

为：

format.html {               
    flash[:notice] = @user.errors.full_messages.to_sentence
    redirect_to edit_manage_user_path(@user)
}

我能够绕过这个问题。我仍然很好奇为什么在更新失败后渲染“编辑”不起作用。

Answer 1

当您从update方法呈现编辑操作时（在失败路径中），它不会运行edit方法，因此在呈现表单时@form_action为nil。你需要解决这个问题。

我通常不需要设置网址，只有在极少数情况下才能设置网址。您可以将其保留，并让rails处理网址和HTTP方法。

没有路由的Rails匹配[PUT]“/ manage_users”

1 个答案: