如何在角度2中过滤对象内的对象？

Question

我有一个像这样的JSON：

filteredArray = [
    {
    "Key":"Brochure",
    "Value":[{
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"Accounting",
            "Reprint":"Request",
            "Contact":"Mike Astrup",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        },
        {
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"",
            "Reprint":"Request",
            "Contact":"Mike Astrup 1",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        }]
    },
    {
    "Key":"Handout",
    "Value":[{
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"",
            "Reprint":"Request",
            "Contact":"Mike Astrup 2",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        },
        {
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"",
            "Reprint":"Request",
            "Contact":"Mike Astrup 3",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        }]
    }
]

我必须以Angular 2中的Industry为基础过滤数据。

我在Angular 2中的管道中使用此查询，但数据未被过滤。

filteredArray.filter(
    item => item.Value.filter(
        innerItem => innerItem.Industry.match(industry)))

Answer 1

需要从两个过滤器返回数据：

var filteredArray = [
    {
    "Key":"Brochure",
    "Value":[{
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"Accounting",
            "Reprint":"Request",
            "Contact":"Mike Astrup",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        },
        {
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"",
            "Reprint":"Request",
            "Contact":"Mike Astrup 1",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        }]
    },
    {
    "Key":"Handout",
    "Value":[{
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"",
            "Reprint":"Request",
            "Contact":"Mike Astrup 2",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        },
        {
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"",
            "Reprint":"Request",
            "Contact":"Mike Astrup 3",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        }]
    }
]

var test = filteredArray.filter((item) => {
		return item.Value.filter((Initem) => {
			return (Initem.Industry == "Accounting") //Filter for Accounting industry
	})
})

console.log(test);

Answer 2

利用Array.filter和Array.some

let s = this.data.filter((d) => {
      d.Value = d.Value.filter(d1 => {
        if (d1.Industry === "Accounting") { // here put your condition
          return d1;
        }
      });
      if (d.Value.length > 0) {
        return d;
      }
    });

var data = [
    {
    "Key":"Brochure",
    "Value":[{
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"Accounting",
            "Reprint":"Request",
            "Contact":"Mike Astrup",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        },
        {
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"",
            "Reprint":"Request",
            "Contact":"Mike Astrup 1",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        }]
    },
    {
    "Key":"Handout",
    "Value":[{
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"",
            "Reprint":"Request",
            "Contact":"Mike Astrup 2",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        },
        {
            "Title":"Accounting Services",
            "service":"Accounting",
            "Location":"",
            "Industry":"",
            "Reprint":"Request",
            "Contact":"Mike Astrup 3",
            "Updated":"04/15/2017",
            "Owner":"EB",
            "Status":"Approved",
            "online":"true",
            "Type":"Material",
            "Url":".common/service"
        }]
    }
];

var s = data.filter((d) => {
	 d.Value = d.Value.filter(d1 => { 
   if(d1.Industry === "Accounting") {
   return d1;
   }
   });
   if(d.Value.length > 0){
   return d;
   }
});
console.log(s);