Rails没有显示验证错误消息

Question

嗨,伙计们,我是铁杆新手,只做我的第一份报名表.我有一些验证,我希望rails检查,但由于某种原因,它不会显示错误消息.

在views/user/signup.html.erb上我有这个

<h1>Register Now!</h1>
<% form_for :user, @u, :url => { :action => "signup" } do |f| %>
    <%= f.error_messages :header_message => "Please Try Again!", :message => "We had some problems processing your registration" %>
    <%= f.label(:first, "First Name")%>
    <%= f.text_field(:first) %><br/>
    <%= f.label(:last, "Last Name")%>
    <%= f.text_field(:last) %><br/>
    <%= f.label(:username, "Username")%>
    <%= f.text_field(:username) %><br/>
    <%= f.label(:password, "Password")%>
    <%= f.password_field(:password) %><br/>
    <%= f.label(:password_confirmation, "Confirm Password")%>
    <%= f.password_field(:password_confirmation) %><br/>
    <%= f.label(:email, "E-mail")%>
    <%= f.text_field(:email) %> <br/>
    <%= f.label(:terms_of_service, "I agree to the terms of service") %>
    <%= f.check_box(:terms_of_service) %><br/>
    <%= f.submit("Sign Up")%>
<% end %>

在模型上我有以下内容

class User < ActiveRecord::Base
  validates_length_of :username, :within =>4..15
  validates_length_of :password, :within => 3..520
  validates_presence_of :first, :last, :username, :email, :password, :password_confirmation
  validates_uniqueness_of :username, :email
  validates_confirmation_of :password
  validates_format_of :email, :with => /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i, :message => "Invalid email"   
  validates_acceptance_of :terms_of_service, :message => "You must agree to our Terms of Service in order to create account"  
end

调节器

class UserController < ApplicationController
  def index
    @users = User.find(:all)
  end

  def signup
    if !params[:commit]
      render :action =>'signup'
    else
      @u = User.new
      @u.first = params[:first]
      @u.last = params[:last]
      @u.email = params[:email]
      @u.username = params[:username]
      @u.password = params[:password]
      @u.password_confirmation = params[:password_confirmation]
      @u.terms_of_service = params[:terms_of_service]
      if @u.valid?
        @u.password = Digest::SHA512.hexdigest(params[:password])
        @u.password_confirmation = Digest::SHA512.hexdigest(params[:password_confirmation])
        @u.save!
        render :action => 'success'
      else
        render :action => 'signup'
      end
    end
  end
end

编辑:我出于某种原因更新了我的代码,现在我无法创建用户.它会给我错误.谁知道怎么解决这个问题？

Answer 1

问题可能在于您使用redirect而不是render在控制器中.

错误消息将无法在重定向中生效(重定向会导致浏览器立即请求新页面).

如果使用渲染,则消息不会丢失.

Answer 2

假设您已将相关用户命名为控制器中的@user,请将表单更改为

<% form_for :user, @user, :url => { :action => "signup" } do |f| %>

这可能也有效

<% form_for @user, :url => { :action => "signup" } do |f| %>

然后在表格中相应地改变:

<%= f.label(:first, "First Name")%>
<%= f.text_field :first %>

所以加上f.并删除每个_tag.

错误消息部分:

<%= f.error_messages :header => "Please complete all the fields", :message => "There is a problem with one or more fields" %>

不确定:header和:message如何在最后一个中工作,但我希望你明白这个想法.

更新表单标签,因为他们有一个错误.