Ruby-on-rails rails3 上的注意事项和错误
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notices and errors on rails3
提问by denniss
I read somewhere that rails 3 form helper does not have error messages embedded in it anymore. I am wondering how I am supposed to show flash messages when I set them up inside my controller or as an inline notice in redirect_to? How am I supposed to display them on my view? Is there helper for this?
我在某处读到 rails 3 表单助手不再嵌入错误消息。我想知道在我的控制器中设置 Flash 消息或作为 redirect_to 中的内联通知时，我应该如何显示它们？我应该如何在我的视图中显示它们？有这方面的帮手吗？
For example if I have
例如，如果我有
def update
if @person.save
flash[:notice] = "Successfully saved!"
end
end
how do i show the notice on my view?
如何在我的视图中显示通知？
回答by Brian Deterling
flash will still work as long as you display it in your layouts:
只要您在布局中显示 flash，它仍然可以工作：
<div id="page">
<% if flash[:alert] %>
<p class="flash-error"><%= flash[:alert] %></p>
<% end %>
<% if flash[:notice] %>
<p class="flash-notice"><%= flash[:notice] %></p>
<% end %>
<%= yield %>
</div>
You can either display error messages manually or use the dynamic_formgem which gives you the old behavior.
您可以手动显示错误消息，也可以使用dynamic_formgem 为您提供旧行为。
回答by Joshua Partogi
You can still display flash messages in your view with this:
您仍然可以通过以下方式在视图中显示 Flash 消息：
<%= flash[:notice] %>
But if you want to display for error messages:
但是如果你想显示错误信息：
#In your form
<%= form_for @foo do |f| %>
<%= render "shared/error_messages", :target => @foo %>
...
<% end %>
#shared/_error_messages.html.erb
<% if target.errors.any? %>
<div id="error_explanation">
<ul>
<% target.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
