rails tips

随手记录开发中遇到的小问题，备忘。

install plugins

undefined method `paginate' for

安装 plugin 后，需要重启 web server。

radio for boolean field

<%= f.radio_button :direction, "true" %>
<%= f.radio_button :direction, "false" %>

selected for options key value pairs array

it didn't well documented, here is the example:

	  <%= select_tag(
	      :sector_id,
	      options_for_select(
	        [["--请选择--", ""]].concat(Sector.get_for_list.collect {|o| [ o.name, o.id ] }), 
	        [@sector.id, @sector.name])
	      )
	  %>