我正在尝试找到一种在angularjs中创建多级决策树选择器的智能方法。所以，基本上我要找的是： 如果我选择Maingroup＆＃34; GroupA＆＃34;从下拉列表中，我只能看到subgroup1中与GroupA相关的属性。 subgroup1也应该是一个下拉列表。然后，通过另一个下拉列表优化选择，应该仅显示基于Maingroup + Subgroup1的可能选择。 最后，应显示该值。
[{"Maingroup":"GroupA","Subgroup1":"subgroupA1","Subgroup2":"subgroupA21","Value":11.34},
{"Maingroup":"GroupA","Subgroup1":"subgroupA1","Subgroup2":"subgroupA22","Value":40.7},
{"Maingroup":"GroupA","Subgroup1":"subgroupA2","Subgroup2":"subgroupA23","Value":58.23},
{"Maingroup":"GroupA","Subgroup1":"subgroupA2","Subgroup2":"subgroupA24","Value":20.64},
{"Maingroup":"GroupA","Subgroup1":"subgroupA2","Subgroup2":"subgroupA25","Value":74.77},
我在github上放了一个截图和json文件。 谢谢，欢迎提出任何建议。