Javascript 离子2-列出JSON响应中的数组项

我从JSON响应（console.log（cluster incal.ts）中获得了以下输出

现在我只需要列出3:Array（5）中的5个元素名（请参考图片）

  caused by: Cannot find a differ supporting object '[object Object]' of type 'object'. NgFor only supports binding to Iterables such as Arrays.

cal.html

<ion-list>
<ion-item text-wrap *ngFor="let element of finalresult" >      
  <p >element.name</p>
</ion-item>

我的JSON结果

 [{"product_id":"40","sku":"HOS001","name":"Turmeric Powder","set":"9","type":"configurable","category_ids":["2","3"],"website_ids":["1"]},{"product_id":"41","sku":"HOS001-20 grms","name":"Turmeric Powder-20 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"42","sku":"HOS001-100 grms","name":"Turmeric Powder-100 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"43","sku":"HOS001-50 grms","name":"Turmeric Powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"44","sku":"HOS002","name":"Coriander Powder ","set":"9","type":"configurable","category_ids":["2","3"],"website_ids":["1"]},{"product_id":"47","sku":"HOS003","name":"Chilli Powder","set":"9","type":"configurable","category_ids":["2","3"],"website_ids":["1"]},{"product_id":"48","sku":"HOS003-50 grms","name":"Chilli Powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"49","sku":"HOS003-100 grms","name":"Chilli Powder-100 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"50","sku":"HOS003-500 g","name":"Chilli Powder-500 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"51","sku":"HOS003-20 grms","name":"Chilli Powder-20 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"52","sku":"HOS004","name":"Cumin Powder","set":"9","type":"configurable","category_ids":["2","3"],"website_ids":["1"]},{"product_id":"53","sku":"HOS004-50 grms","name":"Cumin Powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"54","sku":"HOS004-500 g","name":"Cumin Powder-500 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"55","sku":"HOS005","name":"Pepper Powder","set":"9","type":"configurable","category_ids":["2","3"],"website_ids":["1"]},{"product_id":"56","sku":"HOS005-50 grms","name":"Pepper Powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"57","sku":"HOS005-10 grms","name":"Pepper Powder-10 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"58","sku":"HOS002-20 grms","name":"Coriander Powder -20 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"59","sku":"HOS002-50 grms","name":"Coriander Powder -50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"60","sku":"HOS002-100 grms","name":"Coriander Powder -100 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"61","sku":"HOS002-500 g","name":"Coriander Powder -500 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"62","sku":"HOS006","name":"Kulambu Chilli powder","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"63","sku":"HOS006-50 grms","name":"Kulambu Chilli powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"64","sku":"HOS007","name":"Sambar Powder","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"66","sku":"HOS007-50 grms","name":"Sambar Powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"67","sku":"HOS008","name":"Rasam Powder","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"68","sku":"HOS008-50 grms","name":"Rasam Powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"69","sku":"HOS009","name":"Idly chutney Powder","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"70","sku":"HOS009-50 grms","name":"Idly chutney Powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"71","sku":"HOS010","name":"Garam Masala ","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"72","sku":"HOS010-50 grms","name":"Garam Masala -50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"73","sku":"HOS011","name":"Curry masala powder","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"74","sku":"HOS011-50 grms","name":"Curry masala powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"75","sku":"HOS011-100 grms","name":"Curry masala powder-100 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"76","sku":"HOS012","name":"Happyos Veg Briyani Masala","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"78","sku":"HOS013","name":"Chicken briyani masala","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"80","sku":"HOS014","name":"Mutton Briyani masala","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"82","sku":"HOS012-50 grms","name":"Veg Briyani Masala-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"83","sku":"HOS013-50 grms","name":"Chicken briyani masala-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"84","sku":"HOS014-50 grms","name":"Mutton Briyani masala-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"85","sku":"HOS015","name":"Chilli Chicken Masala","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"86","sku":"HOS015-50 grms","name":"Chilli Chicken Masala-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"87","sku":"HOS016 ","name":"Chicken Masala","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"88","sku":"HOS016 -50 grms","name":"Chicken Masala-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"89","sku":"HOS016 -20 grms","name":"Chicken Masala-20 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"90","sku":"HOS016 -100 grms","name":"Chicken Masala-100 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"91","sku":"HOS016 -250 g jar","name":"Chicken Masala-250 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"92","sku":"HOS017","name":"Mutton Masala","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"93","sku":"HOS017-50 grms","name":"Mutton Masala-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"94","sku":"HOS017-100 g jar","name":"Mutton Masala-100 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"95","sku":"HOS017-250 g jar","name":"Mutton Masala-250 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"96","sku":"HOS016 -100 g jar","name":"Chicken Masala-100 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"97","sku":"HOS018","name":"Fish fry Masala","set":"9","type":"configurable","category_ids":["2","5"],"website_ids":["1"]},{"product_id":"98","sku":"HOS018-50 grms","name":"Fish fry Masala-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"99","sku":"HOS019","name":"Asafoetida Powder","set":"9","type":"configurable","category_ids":["2","4"],"website_ids":["1"]},{"product_id":"100","sku":"HOS019-50 grms","name":"Asafoetida Powder-50 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"101","sku":"HOS020","name":"Mango Thokku Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"102","sku":"HOS020-200 g","name":"Mango Thokku Pickles-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"103","sku":"HOS021","name":"Coriander leaves Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"104","sku":"HOS021-200 g","name":"Coriander leaves Pickle-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"105","sku":"HOS022","name":"Ginger Pickle ","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"106","sku":"HOS022-200 g","name":"Ginger Pickle -200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"107","sku":"HOS023","name":"Sweet Mango Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"108","sku":"HOS023-200 g","name":"Sweet Mango Pickle-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"109","sku":"HOS024","name":"Pudina Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"110","sku":"HOS024-200 g","name":"Pudina Pickle-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"112","sku":"HOS026","name":"Tomato Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"113","sku":"HOS026-200 g","name":"Tomato Pickle-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"114","sku":"HOS027","name":"Lime Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"115","sku":"HOS027-200 g","name":"Lime Pickle-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"116","sku":"HOS028","name":"Garlic Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"117","sku":"HOS028-200 g","name":"Garlic Pickle-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"118","sku":"HOS029","name":"Mango Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"119","sku":"HOS029-200 g","name":"Mango Pickle-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"120","sku":"HOS030","name":"Bitterlime Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"121","sku":"HOS030-200 g","name":"Bitterlime Pickle-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"122","sku":"HOS031","name":"Vathakulambu Mix","set":"9","type":"configurable","category_ids":["2","8"],"website_ids":["1"]},{"product_id":"123","sku":"HOS031-200 g","name":"Vathakulambu Mix-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"124","sku":"HOS032","name":"Puliyodharai Mix","set":"9","type":"configurable","category_ids":["2","8"],"website_ids":["1"]},{"product_id":"125","sku":"HOS032-200 g","name":"Puliyodharai Mix-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"126","sku":"HOS033","name":"Mixed veg Pickle","set":"9","type":"configurable","category_ids":["2","6"],"website_ids":["1"]},{"product_id":"127","sku":"HOS033-200 g","name":"Mixed veg Pickle-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"128","sku":"HOS038","name":"Appalam","set":"9","type":"configurable","category_ids":["2","9"],"website_ids":["1"]},{"product_id":"129","sku":"HOS038-100 grms","name":"Appalam-100 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"130","sku":"HOS038-150 g","name":"Appalam-150 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"131","sku":"HOS038-200 g","name":"Appalam-200 g","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"132","sku":"HOS031-200 g-Packet","name":"Vathakulambu Mix-200 g-Packet","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"133","sku":"HOS031-100 grms-Packet","name":"Vathakulambu Mix-100 grms-Packet","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"134","sku":"HOS031-10 grms-Pet Jar","name":"Vathakulambu Mix-100 grms-Pet Jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"135","sku":"HOS001-100 g jar","name":"Turmeric Powder-100 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"136","sku":"HOS001-250 g jar","name":"Turmeric Powder-250 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"137","sku":"HOS001-500 g jar","name":"Turmeric Powder-500 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"138","sku":"HOS002-250 g jar","name":"Coriander Powder -250 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"139","sku":"HOS002-100 g jar","name":"Coriander Powder -100 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"140","sku":"HOS003-100 g jar","name":"Chilli Powder-100 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"141","sku":"HOS003-250 g jar","name":"Chilli Powder-250 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"142","sku":"HOS006-100 g jar","name":"Kulambu Chilli powder-100 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"143","sku":"HOS006-250 g jar","name":"Kulambu Chilli powder-250 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"144","sku":"HOS007-100 grms","name":"Sambar Powder-100 grms","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"145","sku":"HOS007-100 g jar","name":"Sambar Powder-100 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"146","sku":"HOS007-250 g jar","name":"Sambar Powder-250 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"147","sku":"HOS007-500 g jar","name":"Sambar Powder-500 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"148","sku":"HOS008-100 g jar","name":"Rasam Powder-100 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"149","sku":"HOS008-250 g jar","name":"Rasam Powder-250 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"150","sku":"HOS008-500 g jar","name":"Rasam Powder-500 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"151","sku":"HOS009-100 g jar","name":"Idly chutney Powder-100 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"152","sku":"HOS009-250 g jar","name":"Idly chutney Powder-250 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"153","sku":"HOS009-500 g jar","name":"Idly chutney Powder-500 g jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"154","sku":"HOS019-20 grms-Pet Jar","name":"Asafoetida Powder-20 grms-Pet Jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"155","sku":"HOS019-10 grms-Pet Jar","name":"Asafoetida Powder-10 grms-Pet Jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]},{"product_id":"156","sku":"HOS022-200 g-Pet Jar","name":"Ginger Pickle -200 g-Pet Jar","set":"9","type":"simple","category_ids":[],"website_ids":["1"]}]

最终的结果应该和下图相似。但它应该显示姜黄粉、芫荽粉

---

你的集合应该是一个数组，现在你有一个由两个数组组成的对象。你需要一个嵌套的

*ngFor

和

{}

<ion-item text-wrap *ngFor="let element of finalresult" >      
  <p *ngFor="let mydetail of element " >{{mydetail.name}}</p>
</ion-item>

{{mydetail.name}

通过使用*ngFor=“let element of finalresult”，您要求它循环遍历完整的jsonfinalresult，它是一个对象。正如您所说，您只需要从结果中获取特定的数组元素，您可以尝试传递该元素的键或索引

因此，您的*ngFor现在将是，

*ngFor=“let element of finalresult[3]”

---

如果您想进一步操作数据，可以检查管道的概念。

您会遇到此错误，因为您的变量集群是一个对象而不是数组

换衣服

let cluster = {};

到

然后相应地改变你的NGF

<ion-item text-wrap *ngFor="let element of finalresult[3]" >      
  <p>element.name</p>
</ion-item>

---

已尝试。但再次出现错误。找不到类型为“object”的不同支持对象“[object object]”。NgFor仅支持绑定到数组等可重用项。最终结果如何？最终输出更新不是结果？否。错误为“找不到不同的支持对象”[object object object]类型为“object”。NgFor仅支持绑定到数组“Did.But Error”等不可编辑项，无法读取未定义的属性“3”，浏览器控制台输出更改为（10）[未定义×2，数组（33），数组（5），数组（1），数组（13），数组（11），未定义×1，数组（2），数组（1）]2:Array（33）3:Array（5）0:Objectcategory_ID:Array（2）名称：“姜黄粉”产品编号：“40”套装：“9”sku:“HOS001”类型：“可配置”网站编号：数组（1）\uuuuuuuuuuuu:Object1:Object2:Object3:Object4:Objectlength:5\uuuuuuuuuu:Array（0）4:Array（1）5:Array（13）6:Array（11）8:Array（2）9:Array（1）长度：10\uuuuuuuuuuuuuu-proto:Array（0）非常感谢Saksham Gupta。错误：./Calendar类Calendar中的错误-原因：无法读取UndefinedTery finalresult的属性“3”？[3]，它仅在定义对象时读取。finalresult的数据类型是什么？

let cluster = [];

<ion-item text-wrap *ngFor="let element of finalresult[3]" >      
  <p>element.name</p>
</ion-item>

let finalresult = []; //where you have declared the variable

this.httpProvider.getJsonData().subscribe(

        result => {

            this.newsData=result;
            let cluster = [];
            let i = 0;
            result.forEach( r => {
                i++;
                let j = 0;
                r.category_ids.forEach( id => {
                    j++;
                    if(!cluster[id])
                        cluster[id] = [];
                    cluster[id].push(r);
                });
                if(i == result.length && j == r.category_ids.length) this.finalresult=cluster;
            });
            console.log(cluster);
        },
        err =>{
            console.error("Error : "+err);
        } ,
        () => {
            this.loading.dismiss();
        }
    );