ROR学习笔记（43）——china-city的gem用法

https://github.com/saberma/china_city
china-city是一个比较方便的城市级联选择框的gem，用法如下：

gem 'china_city'

application.js

//= require 'china_city/jquery.china_city'

routes.rb

mount ChinaCity::Engine => '/china_city'

views

<div class="city-group">
    <%= select_tag :province, options_for_select(ChinaCity.list.unshift(["--省份--", 0]),0), class: "city-select" %>
    <%= select_tag :city, options_for_select([["--城市--", 0]]), class: "city-select" %>
    <%= select_tag :area, options_for_select([["--地区--", 0]]), class: "city-select" %>
</div>

通过ChinaCity.get("440300")将编码转化成名称。

province = ChinaCity.get(params[:province])
city= ChinaCity.get(params[:city])
area= ChinaCity.get(params[:area])