rails undefined method error_messages

学习了:http://stackoverflow.com/questions/10002140/use-error-messages-in-rails-3-2-raises-undefined-method-error

<%= form_for [@camp, @program] do |f| %>
   <% @program.errors.full_messages.each do |msg| %>
      <p><%= msg %></p>
   <% end %>
<%= f.label :name %>
<% end %>
时间: 2024-08-02 10:37:51

rails undefined method error_messages的相关文章

ruby on rails错误undefined method `title&#39; for nil:NilClass

首先搞清楚这句话,在 Ruby 中,方法分为 public.private 和 protected 三种,只有 public 方法才能作为控制器的动作. 我的出错的代码如下: controlle class ArticlesController < ApplicationController def new end def create params.permit! @article = Article.new(params[:article]) @article.save redirect_t

ruby on rails错误undefined method `title&amp;#39; for nil:NilClass

首先搞清楚这句话,在 Ruby 中,方法分为 public.private 和 protected 三种,仅仅有 public 方法才干作为控制器的动作. 我的出错的代码例如以下: controlle class ArticlesController < ApplicationController def new end def create params.permit! @article = Article.new(params[:article]) @article.save redirec

rails中render 和 redirect_to的区别, each只能用在数组中,如果只有一个或者零个项,用each方法会报错undefined method `each&#39; for #...

在render中,即使有:action,那么也仅仅是取对应的view中的模板(html.erb)而已,所以这里即使浏览器中的url是/orders/xcreate,但是显示的界面是/app/views/orders/xshow的代码 def xcreate flash.now[:notice] = "bb" @order = Order.new(params[:order]) if @order.save flash[:notice] = "yes" render(

undefined method `environment&#39; for nil:NilClass when importing Bootstrap into rails

今天做项目时往Gemfile里加了各gem, 然后bundle update了一下, 然后悲剧了,出现了undefined method `environment' for nil:NilClass when importing Bootstrap into rails错误, 各种不理解. 然后查了一下, 找到了解决方案: https://stackoverflow.com/questions/22392862/undefined-method-environment-for-nilnilcla

snorby 2.6.2 undefined method `run_daily_report&#39; for Event:Class (NoMethodError)

rails runner "Event.run_daily_report"测试邮件配置undefined method `run_daily_report' for Event:Class (NoMethodError) 原因是:snorby2.6.1开始移除了DailyCacheJob,因此需要更换测试方式 新的测试方式:rails r ReportMailer.daily_report.deliver 源自:https://github.com/Snorby/snorby/issu

&quot;undefined method `root&#39; for nil:NilClass&quot; error when using &quot;pod install&quot; 解决办法

如果pod undate 的时候报错"undefined method `root' for nil:NilClass" error when using "pod install" 或 NoMethodError - undefined method `dirname' for nil:NilClass 检查你的podfile文件 保证一下信息存在 Pod::Spec.new do |s| s.name = "DDEBusiness" s.ve

Git Push问题remote: hooks/update:10 undefined method &#39;require_relative&#39; for main:Object(NomethodError)

今天在提交代码时遇到到了一个很蛋疼的问题,remote: hooks/update:10 undefined method 'require_relative' for main:Object(NomethodError) 找了很多网上的资料也不行,最后无意中解决掉了...由于我用的是sourceTree工具,可能是不小心更改了设置,把类型弄成了其它,不是git了,导致代码push不成功 Git Push问题remote: hooks/update:10 undefined method 're

Laravel笔记之Call to undefined method DebugBar\DebugBar::warning()

使用Laravel Debugbar (Integrates PHP Debug Bar)调试信息报错. Debugbar::warning('Watch out…'); 报错信息如下: Call to undefined method DebugBar\DebugBar::warning() phpStorm工具只能导入包,在导入DebugBar的时候出的问题,导入的是其他的DebugBar的包,所以错误.将命名空间改成: use Barryvdh\Debugbar\Facade as Deb

Composer环境混乱引起--Fatal error: Call to undefined method Fxp

Fatal error: Call to undefined method Fxp\Composer\AssetPlugin\Package\Version\V ersionParser::parseLinks() in C:\Documents and Settings\Administrator\Applicatio n Data\Composer\vendor\fxp\composer-asset-plugin\Repository\VcsPackageFilter.php on line