Railscast skill(9)

Complex Partials
Rendering partials with layouts
view 重複的部份 不只是裡面 也有可能是外面, render 的參數也可以代layout
Partials can have their own layouts applied to them. These layouts are different than the ones that are specified globally
for the entire action, but they work in a similar fashion. Imagine a list with two types of users:
<br /> <% render(:layout => "administrator", :locals => { :user => chief }) do %> <br /> Title: <%= chief.title %> <br /> <% end %> <br /><br /><br /> <!-- app/views/users/_administrator.html.erb --> <br /> <div id="administrator"> <br /> Budget: $<%= user.budget %> <br /> <%= yield if block_given? %><br /> </div> <br />

Customize Field Error
可以自訂error msg 的格式
# environment.rb<br />ActionView::Base.field_error_proc = Proc.new do |html_tag, instance_tag|<br /> "<span class='field_error'>#{html_tag}</span>"<br />end<br />