English 中文(简体)
如何看一看“档案——名称”是否载于@files?
原标题:How do i see if a "file_name" is contained in @files?

在我的控制人员中,我有:

@documents = Document.find(:all, :order => "section asc, sub_section asc, position asc, name asc")
@files = Dir.glob("public/downloads/*").sort

我认为:

<% @documents.each do |d| -%>
    <tr class="<%= cycle("","alt") %>">
        <td><%= d.name %></td>
        <td><%= d.file_name %></td>
        <td><%= d.description %></td>
        <td>
            <%= link_to "Edit", edit_document_path(d) %><br>
            <%= link_to "Del", document_path(d), :confirm => "Are you sure boogerhead?", :class => "destroy", :method => :delete %>
        </td>
    </tr>
<% end -%>

如果档案中不包含姓名,则取决于该名称的另一页(档案名称)的链接将不予使用。 如果不匹配,则我用彩色密码档案——姓名表示存在问题。 如何检查档案是否包含在@files中?

增 编

最佳回答

<代码>Array#include? 检查某一项物品是否包含在一阵列中的方法,以便:

if @files.include?(d.file_name)
  # It is included
else
  # It isn t
end
问题回答

也可以检查一下,如果在你“指导性假”中存在档案:

File.exist?(file_path)

或者,如果我阅读你的代码,你会重新检查某一文件是否正确? 如果是这样,那么为什么不使用纸面文件,你就可以增加一个你的文件应当有档案的协会。

Or if that s not possible, you can still transfer that logic into your Document model like so:

 def has_file
   File.exist?("public/downloads/#{file_name}")
 end 

然后,在座右边,

<% @documents.each do |d| -%>
  <% if d.has_file %>
    <tr class="<%= cycle("","alt") %>">
      <td><%= d.name %></td>
      <td><%= d.file_name %></td>
      <td><%= d.description %></td>
      <td>
        <%= link_to "Edit", edit_document_path(d) %><br>
        <%= link_to "Del", document_path(d), :confirm => "Are you sure boogerhead?", :class => "destroy", :method => :delete %>
      </td>
    </tr>
  <% end %>
<% end -%>




相关问题
rails collection_select vs. select

collection_select and select Rails helpers: Which one should I use? I can t see a difference in both ways. Both helpers take a collection and generates options tags inside a select tag. Is there a ...

SSL slowness in EC2

We ve deployed our rails app to EC2. In our setup, we have two proxies on small instances behind round-robin DNS. These run nginx load balancers for a dynamically growing and shrinking farm of web ...

Auth-code with A-Za-z0-9 to use in an URL parameter

As part of a web application I need an auth-code to pass as a URL parameter. I am currently using (in Rails) : Digest::SHA1.hexdigest((object_id + rand(255)).to_s) Which provides long strings like : ...

RubyCAS-Client question: Rails

I ve installed RubyCAS-Client version 2.1.0 as a plugin within a rails app. It s working, but I d like to remove the ?ticket= in the url. Is this possible?

activerecord has_many :through find with one sql call

I have a these 3 models: class User < ActiveRecord::Base has_many :permissions, :dependent => :destroy has_many :roles, :through => :permissions end class Permission < ActiveRecord::...

Ordering a hash to xml: Rails

I m building an xml document from a hash. The xml attributes need to be in order. How can this be accomplished? hash.to_xml

Text Editor for Ruby-on-Rails

guys which text editor is good for Rubyonrails? i m using Windows and i was using E-Texteditor but its not free n its expired now can anyone plese tell me any free texteditor? n which one is best an ...

How to get SQL queries for each user where env is production

I’m developing an application dedicated to generate statistical reports, I would like that user after saving their stat report they save sql queries too. To do that I wrote the following module: ...

热门标签