rails实现省市级联

页面代码如下：
省份列表框：

   
<%=@resources=Province.find :all ,:conditions=>"resource_level=1"  
 @provices<<Province.new(:id=>0,:resource_name=>"--请选择省份--")
 collection_select(:move,"id",@resources,:id,:resource_name,{},
:onchange =>"change('move_id','move_city_id')")
 %>

市列表框：

<select id="move_city_id" name="city[city_id]">
     <option value="" selected="selected">--请选择市--</option>
</select>

js：

 
        //ajax联动，需要传递两个列表框id
        function change(levelone_id,leveltwo_id)
        {
            new Ajax.Request(
            '/manage/ajax_find_leveltwo/'+$(levelone_id).value,       
            {       
                method: 'get',       
                requestHeaders:{Accept:'application/json'},
                onComplete: function showResponse(transport)
                {
                    var json = eval(transport.responseText);       
                    $(leveltwo_id).options.length=1;       
                    for(var i=0;i<json.length;i++)
                    {                
                        var oNewNode=new Option();       
                        oNewNode.value=json[i].city.id;       
                        oNewNode.text=json[i].resource.resource_name;       
                        $(leveltwo_id).options.add(oNewNode);
                    }            
                },
                asynchronous:true, 
                evalScripts:true       
            });     
        }

action中代码如下：

  
def ajax_find_leveltwo
    @citys=City.find :all,:conditions=>"parent_id=#{params[:id]} "
    render :text => @citys.to_json
  end

评论

1 楼 leopard1823 2008-12-23  

jieshiyixia