All About Layouts

railscast All About Layouts
layout 幾個常用的用法
<br /># projects_controller.rb<br />layout :user_layout<br />#或者可以直接傳 string, layout :application<br /><br />def index<br /> @projects = Project.find(:all)<br /> render :layout => 'projects'<br /> #除了上面這個可以在 render 時再去指定, 也可以 :layout => false 選擇不要layout了<br />end<br /><br />protected<br /><br />#如果 layout :user_layout 傳的是symbol 就會找method<br />def user_layout<br /> if current_user.admin?<br /> "admin"<br /> else<br /> "application"<br /> end<br />end<br />

All About Layouts

railscast All About Layouts
layout 幾個常用的用法
<br /># projects_controller.rb<br />layout :user_layout<br />#或者可以直接傳 string, layout :application<br /><br />def index<br /> @projects = Project.find(:all)<br /> render :layout => 'projects'<br /> #除了上面這個可以在 render 時再去指定, 也可以 :layout => false 選擇不要layout了<br />end<br /><br />protected<br /><br />#如果 layout :user_layout 傳的是symbol 就會找method<br />def user_layout<br /> if current_user.admin?<br /> "admin"<br /> else<br /> "application"<br /> end<br />end<br />

Rescue from dispatching, layout mailer

Rescue from dispatching
人家這個sample 太好 不知道要講啥 XD
<br />class ApplicationController < ActionController::Base<br /> rescue_from ActionController::RoutingError, :with => :route_not_found<br /> rescue_from ActionController::MethodNotAllowed, :with => :invalid_method<br /> <br /> private<br /> <br /> def route_not_found<br /> render :text => 'What the fuck are you looking for ?', :status => :not_found<br /> end<br /> <br /> def invalid_method<br /> message = "Now, did your mom tell you to #{request.request_method.to_s.upcase} that ?"<br /> render :text => message, :status => :method_not_allowed<br /> end<br />end<br />
Mailer Layouts
default 他會找 layout 裡 加上 _mailer的, 像這邊就是會去找layouts/user_mailer.html.erb <br />class UserMailer < ActionMailer::Base<br /> def registration(user)<br /> subject "You've registered"<br /> from "system@example.com"<br /> end<br />end<br />
當然也可以自己指定 layou
<br />class UserMailer < ActionMailer::Base<br /> layout 'email'<br /> ...<br />end<br />

Rescue from dispatching, layout mailer

Rescue from dispatching
人家這個sample 太好 不知道要講啥 XD
<br />class ApplicationController < ActionController::Base<br /> rescue_from ActionController::RoutingError, :with => :route_not_found<br /> rescue_from ActionController::MethodNotAllowed, :with => :invalid_method<br /> <br /> private<br /> <br /> def route_not_found<br /> render :text => 'What the fuck are you looking for ?', :status => :not_found<br /> end<br /> <br /> def invalid_method<br /> message = "Now, did your mom tell you to #{request.request_method.to_s.upcase} that ?"<br /> render :text => message, :status => :method_not_allowed<br /> end<br />end<br />
Mailer Layouts
default 他會找 layout 裡 加上 _mailer的, 像這邊就是會去找layouts/user_mailer.html.erb <br />class UserMailer < ActionMailer::Base<br /> def registration(user)<br /> subject "You've registered"<br /> from "system@example.com"<br /> end<br />end<br />
當然也可以自己指定 layou
<br />class UserMailer < ActionMailer::Base<br /> layout 'email'<br /> ...<br />end<br />

有些form function 需要共用時, 可以放在layout

//隱藏在角落的  form
<% form_tag({:action => :show}, :class => 'show_stock') do %>
  <%= hidden_field_tag :id %>
<% end %>

     $(function(){
        $('.layout.searchStockBtn').click(function() {
         var val  = $(this).parent().parent().find('.target_search').val();
         var form = $('.show_stock');   <= 把 隱藏的 form 拿出來用
         form.attr('action','<%= targets_show_path(:id => "") %>'); <= 把 form 的 action 變成其他 url
         form.find('input').attr('name','id').val(val);  <= 找值
         form.get(0).submit();
         return false;
      });

layout, select_layout

  layout :select_layout

  def select_layout
    case action_name
    when 'action1', 'action2'
      'layout1'
    when 'action3'
      'layout2'
    end
  end 

rjs update layout

http://www.codefluency.com/articles/2006/05/27/rails-views-render-update-not-rjs/
http://www.scribd.com/doc/220397/RJShow-it-works
http://api.rubyonrails.org/classes/ActionView/Helpers/PrototypeHelper/JavaScriptGenerator/GeneratorMethods.html
http://api.rubyonrails.org/classes/ActionView/Helpers/PrototypeHelper.html

[test rjs]
page.you_holder.cde

[application.js]
YouHolder.cde = function(){
(function($){
 alert('lalala');
 })(jQuery);
}



layout proc{ |c| c.request.xhr? ? false : "application" }