lshgood (lshgo)

模型装饰 draper gem 包

lshgood — Thu, 14 Mar 2013 10:57:03 +0800

gem 'draper', '~> 1.0'

# app/models/article.rb

class  Article < ActiveRecord::Base
    attr_accessible :publication_status
end

# app/controllers/articles_controller.rb

def show
   @article = Article.find(params[:id]).decorate   #----
end

# app/decorators/article_decorator.rb

class ArticleDecorator < Draper::Decorator
    delegate_all

    def publication_status
        if published?
           "Published at #{published_at}"
        else
          "Unpublished"
        end
     end

    def published_at
        source.published_at.strftime("%A, %B %e")
     end
end

就可以这样用了

<%= @article.publication_status %>

simple_form Custom inputs

lshgood — Wed, 16 Jan 2013 15:23:34 +0800

https://github.com/lshgo/simple_form_chosen

simple_form Custom inputs 还不错

 # app/inputs/chosen_input.rb

 class ChosenInput < SimpleForm::Inputs::Base
  def input
    # "$ #{@builder.text_field(attribute_name, input_html_options)}".html_safe 
  end
end

f.input :money, :as => :chosen

collection 集合。

# app/inputs/collection_select_input.rb

class CollectionSelectInput < SimpleForm::Inputs::CollectionSelectInput
  def input_html_classes
    super.push('chosen')
  end
end

f.input :money, :as => :collection, :collection =>

jquery-chosen 选择框插件

lshgood — Sat, 12 Jan 2013 11:26:32 +0800

Chosen 是一个 JavaScript 插件，它能让丑陋的、很长的 select 选择框变的更好看、更方便，不仅如此，它更扩大了，增长了主动筛选的功能。它可对列表进行分组，同时也可禁用某些选择项。目前，它支持 jQuery 和 Prototype 两种 JavaScript 引擎。

http://harvesthq.github.com/chosen/

<select class="chzn-select" data-placeholder="Choose a Country" style="width:350px;" tabindex="1"> 
               <option value=""></option>  
               <option value="United States">United States</option>  
               <option value="United Kingdom">United Kingdom</option>  
               <option value="Afghanistan">Afghanistan</option>  
               <option value="Albania">Albania</option>  
</select>

初始化：

$(".chzn-select").chosen();

js 参数设置

在调用 chosen（）办法时，我们可以设置一些参数：

选项描述 no_results_text 无搜刮成果显示的文本 allow_single_de 是否容许作废选择 max_ed_options 当为多选时，最多选择个数

搜不到时，提示：

 $（".chzn-select"）.chosen（{ 
                                      no_results_text: "没有找到"，
                                      allow_single_de: true
}）;

事务

a）change 事务：

$（".chzn-select"）.chosen（）.change（function（）{
   ......
}）;

b）当我们须要动态更新下的选择项时，只要在更新选择项后触发 Chosen 中的 liszt:d 事务就可以了：

$（".chzn-select"）.html（""...<%option%>china<%/option%>...""）;
$（".chzn-select"）.trigger（"liszt:d"）;

若是不想要搜刮框的话，用 css 把它隐蔽掉：

.chzn-container-single .chzn-search {
    display: none;
}

提示下：

ie6 和 ie7 直接返回对象本身，看 chosen.jquery.js：

if ($.browser.msie && ($.browser.version === "6.0" || ($.browser.version === "7.0" && document.documentMode === 7))) {
        return this;
}

nginx + passenger passenger 报错了

lshgood — Wed, 26 Sep 2012 18:08:12 +0800

Ruby (Rack) application could not be started

These are the possible causes: There may be a syntax error in the application's code. Please check for such errors and fix them. A required library may not installed. Please install all libraries that this application requires. The application may not be properly configured. Please check whether all configuration files are written correctly, fix any incorrect configurations, and restart this application. A service that the application relies on (such as the database server or the Ferret search engine server) may not have been started. Please start that service. Further information about the error may have been written to the application's log file. Please check it in order to analyse the problem.

Error message:

You passed :github as an option for gem 'mongoid_colored_logger', but it is invalid. (Bundler::InvalidOption)

Exception class: PhusionPassenger::UnknownError

请问，这样的错出在那里，谢 nginx + passenger 访问服务器报的。