Redmine：自动预览附件图片

redmine用做项目管理的工具，新增加图片的话，在查看问题时候，无法预览，必须点击一次，在新窗口打开，很不人性化。

解决方法：

安装目录下，修改文件：

D:\Bitnami\redmine-3.1.1-1\apps\redmine\htdocs\app\views\attachments\_links.html.erb

第一种：显示全图，增加以下代码即可：

<SPAN style="FONT-SIZE: medium"><% images = attachments.select { |a| a.image? } %>

<% unless images.empty? %>
<div class='images'>
<% images.each do |attachment| %>
<%= link_to image_tag(url_for({:controller => 'attachments', :action => 'show', :id => attachment, :filename => attachment.filename })),
{:controller => 'attachments', :action => 'show', :id => attachment, :filename => attachment.filename }, :class => 'lightbox', :rel => 'attachments', :title => "#{attachment.filename}#{ ('-' + attachment.description) unless attachment.description.blank? }" %>
<% end -%>
</div>
<% end -%></SPAN>

第二种：先显示预览图片，则需要增加：

<SPAN style="FONT-SIZE: medium"><% images = attachments.select { |a| a.image? } %>

<% unless images.empty? %>
<div class='images'>
<% images.each do |attachment| %>
<%= link_to image_tag(url_for({:controller => 'attachments', :action => 'show', :id => attachment, :filename => attachment.filename }), :width => '180'),
{:controller => 'attachments', :action => 'show', :id => attachment, :filename => attachment.filename }, :class => 'lightbox', :rel => 'attachments', :title => "#{attachment.filename}#{ ('-' + attachment.description) unless attachment.description.blank? }" %>
<% end -%>
</div>
<% end -%></SPAN>

多了一个参数“width
=> '180'”180就是你设置的图片宽度

总结：
推荐
第一个：全图显示。第二种：预览图片，小图延伸失真，大图变小看不清，亦需新窗口打开。