在 Ruby on Rails 中呈现验证错误 [英] Rendering validation errors in Ruby on Rails

问题描述

在模型中说任务，我有以下验证

 validates_presence_of :subject, :project, :user, :status

如何使用其他控制器为这些验证呈现错误消息.

我正在使用的 CustomController 内部，

Task.create(hash)

在散列中传递 nil 值会出现以下错误，

 ActiveRecord::RecordInvalid in CustomController#create验证失败:主题不能为空

控制器创建动作中的代码

@task = Task.create(hash)如果@task.valid?flash[:notice] = l(:notice_successful_update)别的flash[:error] = "
"+ @task.errors.full_messages.map{|o|
"+ o + "</li>"}.join("") + "</ul>"结尾重定向到:返回

如何向用户呈现错误消息.

任务模型已经建立并呈现正确的消息.我想从插件中使用它的功能.

解决方案

这应该可行

<%= form_for(@task) do |f|％＞<% if @task.errors.any?％＞<div id="error_explanation"><h2><%=pluralize(@task.errors.count, "error") %>禁止保存此任务:</h2><ul><% @task.errors.full_messages.each 做 |msg|％＞<li><%=msg%></li><%结束%>

<%结束%><div class="actions"><%= f.submit %>

<%结束%>

In a model say Task, I have following validation

 validates_presence_of :subject, :project, :user, :status

How do I render error messages for these validations using some other controller.

Inside CustomController I am using,

Task.create(hash)

passing nil values in hash gives following error,

 ActiveRecord::RecordInvalid in CustomController#create

 Validation failed: Subject can't be blank

Code in the controller's create action

@task = Task.create(hash)
if @task.valid?
   flash[:notice] = l(:notice_successful_update)
else
    flash[:error] = "<ul>" + @task.errors.full_messages.map{|o| "<li>" + o + "</li>" }.join("") + "</ul>"
end
redirect_to :back

How to render error messages to user.

Task model is already built and it renders proper messages. i want to use its functionalities from a plugin.

解决方案

This should work

<%= form_for(@task) do |f| %>
  <% if @task.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@task.errors.count, "error") %> prohibited this task from being saved:</h2>

      <ul>
      <% @task.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

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