HasFinder

http://pivots.pivotallabs.com/users/nick/blog/articles/284-hasfinder-it-s-now-easier-than-ever-to-create-complex-re-usable-sql-queries
纯备忘。

Tabnav

项目里用到了个plugin，叫Tabnav，具体见：http://www.seesaw.it/en/toolbox/widgets/

tab的name和link需要自己写个类来定义，以前的开发者将它放在models目录下（不知道可不可以放在别的目录下），命名为xyy_tabnav.rb

class XyyTabnav < Tabnav::Base
  add_tab do
    named 'tab_1'
    links_to(lambda{ { :controller => 'xxx', :action => 'show', :id => 1 }})
  end

  add_tab do
    named 'tab_2'
    links_to(lambda{ { :controller => 'yyy', :action => 'index' }})
  end
end

在Tabnav这个plugin的目录下，有个generators文件夹，里面相当于是个demo，模仿着用就行了。

Haml中的注释

以前一直不知道怎么在Haml中注释掉一段代码。
结果官方文档上写得清清楚楚：

/

The forward slash character, when placed at the beginning of a line, wraps all text after it in an HTML comment. For example:

%peanutbutterjelly
 / This is the peanutbutterjelly element
 I like sandwiches!

is compiled to:

<peanutbutterjelly>
 <!-- This is the peanutbutterjelly element -->
 I like sandwiches!
</peanutbutterjelly>

The forward slash can also wrap indented sections of code. For example:

/
 %p This doesn't render...
 %div
   %h1 Because it's commented out!

is compiled to:

<!--
 <p>This doesn't render...</p>
 <div>
   <h1>Because it's commented out!</h1>
 </div>
-->

还是跟缩进相关。

至于反斜杠\(backslash)，当然是转义字符啦。

%title
 = @title
 \- MySite

is compiled to:

<title>
 MyPage
 - MySite
</title>

具体请参考官方文档：
The full Haml reference
The full Sass reference
The RDoc documentation