这似乎很简单，但不知怎的，我没有得到内部数组元素来在Angular 2上执行ngFor循环。
我有如下的json数组，我需要遍历我的响应数组中的可用'routes'，它是嵌套元素。 现在任何人都可以告诉我如何获得应该简单的路线，我正在尝试这样。路径= respondeJson [0] .routes或者this.routes = resonseJson [0] ['routes']但没有运气。请帮助考虑我在Angular 2上的入门级别或者说使用JSON。
[
{
"routes": {
"0": {
"budget": 326,
"toCity": "United States",
"QuoteIds": [
1,
2
],
"options": 2
},
"1": {
"budget": 374,
"toCity": "Thailand",
"QuoteIds": [
3,
4
],
"options": 2
},
"2": {
"budget": 382,
"toCity": "Singapore",
"QuoteIds": [
5,
6
],
"options": 2
},
"3": {
"budget": 451,
"toCity": "Taiwan",
"QuoteIds": [
7
],
"options": 1
},
"5": {
"budget": 112,
"toCity": "Turkey",
"QuoteIds": [
8
],
"options": 1
},
"6": {
"budget": 314,
"toCity": "Saudi Arabia",
"QuoteIds": [
9
],
"options": 1
},
"8": {
"budget": 518,
"toCity": "Indonesia",
"QuoteIds": [
10
],
"options": 1
},
"10": {
"budget": 384,
"toCity": "Hong Kong",
"QuoteIds": [
11,
12
],
"options": 2
},
"11": {
"budget": 232,
"toCity": "Qatar",
"QuoteIds": [
13
],
"options": 1
},
"22": {
"budget": 254,
"toCity": "Algeria",
"QuoteIds": [
14
],
"options": 1
},
"23": {
"budget": 241,
"toCity": "Kuwait",
"QuoteIds": [
15
],
"options": 1
},
"24": {
"budget": 175,
"toCity": "Israel",
"QuoteIds": [
16,
17
],
"options": 2
},
"25": {
"budget": 266,
"toCity": "Oman",
"QuoteIds": [
18,
19
],
"options": 2
},
"28": {
"budget": 762,
"toCity": "Argentina",
"QuoteIds": [
20,
21
],
"options": 2
},
"30": {
"budget": 78,
"toCity": "Iceland",
"QuoteIds": [
22
],
"options": 1
},
"37": {
"budget": 327,
"toCity": "Canada",
"QuoteIds": [
23,
24
],
"options": 2
},
"39": {
"budget": 238,
"toCity": "Iran",
"QuoteIds": [
25
],
"options": 1
},
"40": {
"budget": 129,
"toCity": "Cyprus",
"QuoteIds": [
26
],
"options": 1
},
"41": {
"budget": 267,
"toCity": "United Arab Emirates",
"QuoteIds": [
27,
28
],
"options": 2
},
"42": {
"budget": 252,
"toCity": "Lebanon",
"QuoteIds": [
29
],
"options": 1
},
"43": {
"budget": 427,
"toCity": "Iraq",
"QuoteIds": [
30
],
"options": 1
},
"50": {
"budget": 142,
"toCity": "Montenegro",
"QuoteIds": [
31
],
"options": 1
},
"55": {
"budget": 418,
"toCity": "Cuba",
"QuoteIds": [
32
],
"options": 1
},
"56": {
"budget": 492,
"toCity": "China",
"QuoteIds": [
33,
34
],
"options": 2
},
"57": {
"budget": 444,
"toCity": "India",
"QuoteIds": [
35
],
"options": 1
},
"62": {
"budget": 477,
"toCity": "Japan",
"QuoteIds": [
36,
37
],
"options": 2
},
"63": {
"budget": 3377,
"toCity": "Costa Rica",
"QuoteIds": [
38
],
"options": 1
},
"65": {
"budget": 210,
"toCity": "Georgia",
"QuoteIds": [
39
],
"options": 1
},
"66": {
"budget": 391,
"toCity": "Sri Lanka",
"QuoteIds": [
40,
41
],
"options": 2
},
"67": {
"budget": 258,
"toCity": "Russia",
"QuoteIds": [
42
],
"options": 1
},
"68": {
"budget": 82,
"toCity": "Poland",
"QuoteIds": [
43
],
"options": 1
},
"71": {
"budget": 104,
"toCity": "Finland",
"QuoteIds": [
44
],
"options": 1
},
"72": {
"budget": 150,
"toCity": "Austria",
"QuoteIds": [
45,
46
],
"options": 2
},
"73": {
"budget": 68,
"toCity": "Spain",
"QuoteIds": [
47
],
"options": 1
},
"75": {
"budget": 106,
"toCity": "Portugal",
"QuoteIds": [
48
],
"options": 1
},
"77": {
"budget": 37,
"toCity": "Romania",
"QuoteIds": [
49
],
"options": 1
},
"78": {
"budget": 66,
"toCity": "Sweden",
"QuoteIds": [
50
],
"options": 1
},
"79": {
"budget": 77,
"toCity": "Denmark",
"QuoteIds": [
51
],
"options": 1
},
"86": {
"budget": 440,
"toCity": "South Africa",
"QuoteIds": [
52,
53
],
"options": 2
},
"87": {
"budget": 176,
"toCity": "Morocco",
"QuoteIds": [
54,
55
],
"options": 2
},
"88": {
"budget": 231,
"toCity": "Serbia",
"QuoteIds": [
56
],
"options": 1
},
"89": {
"budget": 279,
"toCity": "Bosnia and Herzegovina",
"QuoteIds": [
57
],
"options": 1
},
"90": {
"budget": 35,
"toCity": "Italy",
"QuoteIds": [
58
],
"options": 1
},
"92": {
"budget": 72,
"toCity": "Hungary",
"QuoteIds": [
59
],
"options": 1
},
"93": {
"budget": 155,
"toCity": "Croatia",
"QuoteIds": [
60
],
"options": 1
},
"94": {
"budget": 160,
"toCity": "Malta",
"QuoteIds": [
61,
62
],
"options": 2
},
"95": {
"budget": 163,
"toCity": "Greece",
"QuoteIds": [
63,
64
],
"options": 2
},
"96": {
"budget": 67,
"toCity": "Ireland",
"QuoteIds": [
65
],
"options": 1
},
"97": {
"budget": 60,
"toCity": "Netherlands",
"QuoteIds": [
66
],
"options": 1
},
"98": {
"budget": 68,
"toCity": "Norway",
"QuoteIds": [
67
],
"options": 1
},
"99": {
"budget": 71,
"toCity": "Latvia",
"QuoteIds": [
68
],
"options": 1
},
"100": {
"budget": 261,
"toCity": "Belgium",
"QuoteIds": [
69
],
"options": 1
},
"101": {
"budget": 60,
"toCity": "Bulgaria",
"QuoteIds": [
70
],
"options": 1
},
"102": {
"budget": 130,
"toCity": "Switzerland",
"QuoteIds": [
71
],
"options": 1
},
"103": {
"budget": 140,
"toCity": "Ukraine",
"QuoteIds": [
72
],
"options": 1
},
"104": {
"budget": 72,
"toCity": "France",
"QuoteIds": [
73
],
"options": 1
},
"105": {
"budget": 56,
"toCity": "Lithuania",
"QuoteIds": [
74
],
"options": 1
},
"106": {
"budget": 51,
"toCity": "United Kingdom",
"QuoteIds": [
75
],
"options": 1
},
"109": {
"budget": 116,
"toCity": "Czech Republic",
"QuoteIds": [
76
],
"options": 1
},
"110": {
"budget": 59,
"toCity": "Germany",
"QuoteIds": [
77
],
"options": 1
},
"113": {
"budget": 272,
"toCity": "Bahrain",
"QuoteIds": [
78,
79
],
"options": 2
},
"128": {
"budget": 634,
"toCity": "New Zealand",
"QuoteIds": [
80
],
"options": 1
},
"147": {
"budget": 610,
"toCity": "Australia",
"QuoteIds": [
81
],
"options": 1
},
"167": {
"budget": 187,
"toCity": "Moldova",
"QuoteIds": [
82
],
"options": 1
},
"168": {
"budget": 87,
"toCity": "Slovakia",
"QuoteIds": [
83
],
"options": 1
},
"175": {
"budget": 119,
"toCity": "Gibraltar",
"QuoteIds": [
84
],
"options": 1
},
"178": {
"budget": 545,
"toCity": "Laos",
"QuoteIds": [
85
],
"options": 1
}
},
"misc": {
"QuoteDateTime": "2017-04-21T13:56:00",
"MinPrice": 326,
"Direct": false,
"QuoteId": 1,
"skyLink": "http://partners.api.skyscanner.net/apiservices/referral/v1.0/AU/AUD/en-US/anywhere/amd/2017-05-18/2017-05-22?apiKey=wc161029621991497683276175998396"
},
"price": [
326,
392,
374,
434,
382,
470,
451,
112,
314,
518,
384,
553,
232,
254,
241,
175,
199,
422,
266,
1125,
762,
78,
403,
327,
238,
129,
290,
267,
252,
427,
142,
418,
492,
641,
444,
477,
937,
3377,
210,
713,
391,
258,
82,
104,
160,
150,
68,
106,
37,
66,
77,
624,
440,
176,
287,
231,
279,
35,
72,
155,
210,
160,
163,
200,
67,
60,
68,
71,
261,
60,
130,
140,
72,
56,
51,
116,
59,
374,
272,
634,
610,
187,
87,
119,
545
],
"outbound": {
"DepartureDate": "2017-05-18T00:00:00",
"Carrier": "WOW air",
"DestinationId": "EWR",
"OriginId": "LGW"
},
"airline": [
"WOW air",
"Lufthansa",
"Gulf Air",
"EVA Air",
"Turkish Airlines",
"British Airways",
"Turkish Airlines",
"Pegasus Airlines",
"Pegasus Airlines",
"Singapore Airlines",
"Air India",
"British Airways",
"Pegasus Airlines",
"Vueling Airlines",
"Pegasus Airlines",
"Pegasus Airlines",
"Monarch",
"Oman Air",
"Turkish Airlines",
"British Airways",
"United",
"WOW air",
"Air Transat",
"WestJet",
"Pegasus Airlines",
"Cobalt",
"Royal Brunei ",
"Turkish Airlines",
"Pegasus Airlines",
"Pegasus Airlines",
"easyJet",
"KLM",
"Austrian Airlines",
"British Airways",
"Air India",
"Alitalia",
"British Airways",
"Avianca",
"Pegasus Airlines",
"SriLankan Airlines",
"Qatar Airways",
"Pegasus Airlines",
"Wizz Air",
"Norwegian",
"eurowings",
"eurowings",
"Vueling Airlines",
"Monarch",
"Blue Air",
"Norwegian",
"Norwegian",
"Virgin Atlantic",
"Ethiopian Airlines",
"Iberia",
"Thomson Airways",
"Wizz Air",
"Pegasus Airlines",
"Flybe",
"Wizz Air",
"Monarch",
"Air Malta",
"easyJet",
"Pegasus Airlines",
"Aegean Airlines",
"Aer Lingus",
"Vueling Airlines",
"Norwegian",
"Wizz Air",
"eurowings",
"Wizz Air",
"SWISS",
"Ukraine International",
"Vueling Airlines",
"Wizz Air",
"Flybe",
"Flybe",
"Flybe",
"British Airways",
"Pegasus Airlines",
"Qatar Airways",
"Royal Brunei ",
"Wizz Air",
"Wizz Air",
"Monarch",
"Singapore Airlines"
],
"inbound": {
"DepartureDate": "2017-05-22T00:00:00",
"Carrier": "Norwegian",
"OriginId": "JFK",
"DestinationId": "LGW"
}
},
{
"misc": {
"QuoteDateTime": "2017-04-19T06:33:00",
"MinPrice": 392,
"Direct": true,
"QuoteId": 2,
"skyLink": "http://partners.api.skyscanner.net/apiservices/referral/v1.0/AU/AUD/en-US/anywhere/amd/2017-05-18/2017-05-22?apiKey=wc161029621991497683276175998396"
},
"outbound": {
"DepartureDate": "2017-05-18T00:00:00",
"Carrier": "Lufthansa",
"DestinationId": "EWR",
"OriginId": "LHR"
},
"inbound": {
"DepartureDate": "2017-05-22T00:00:00",
"Carrier": "Austrian Airlines",
"OriginId": "EWR",
"DestinationId": "LHR"
}
}
]
答案 0 :(得分：4)
你在这里得到了一些好的答案，但所有人都在操纵你的反应并改变它的构建，而不是按原样处理它。您的响应中还有一些其他数据，并且希望保留数据，因此这是使用Pipe的解决方案。
您的数组中似乎有两个对象，但只有一个包含routes。这总是如此吗？如果没有，您可能希望迭代响应并显示所有对象的所有路由（如果存在），因此我首先迭代数组，然后迭代路由：
<!-- Iterate array -->
<div *ngFor="let obj of jsonData">
<!-- iterate routes for each object using pipe -->
<div *ngFor="let route of obj.routes | keys">
{{route.toCity}}
</div>
</div>
然后是密钥管道：
@Pipe({ name: 'keys', pure: false })
export class KeysPipe implements PipeTransform {
transform(value: any, args?: any[]): any[] {
// check if "routes" exists
if(value) {
// create instance vars to store keys and final output
let keyArr: any[] = Object.keys(value),
dataArr = [];
// loop through the object,
// pushing values to the return array
keyArr.forEach((key: any) => {
dataArr.push(value[key]);
});
// return the resulting array
return dataArr;
}
}
}
这样您就没有操纵您的响应，并且您可以访问响应附带的所有其他数据。
答案 1 :(得分：1)
您需要将对象转换为可迭代数组。
this.http.get('data.json')
.subscribe((res) => {
let keyArr: any[] = Object.keys(res.json()[0].routes);
keyArr.forEach((key: any) => {
this.data.push(res.json()[0].routes[key]);
});
});
答案 2 :(得分：0)
您的路由应该被定义为一个json数组，但是您已经做了一个解决方法，将路由作为一个数组，您明确地给出了索引（0,1 ...），这是不正确的。
解决方案如下：
[
{
"routes": [{
"budget": 326,
"toCity": "United States",
"QuoteIds": [
1,
2
],
"options": 2
}, {
"budget": 374,
"toCity": "Thailand",
"QuoteIds": [
3,
4
],
"options": 2
}
]
}
]
分配方式
this.routes=resonseJson[0]['routes']
在html中迭代它的方法
<div *ngFor="let route of routes">
{{route.toCity}}
</div>
答案 3 :(得分：0)
您必须迭代对象键而不是数组元素。因此要么使用
Object.keys(responseJson[0].routes)
将返回[＆＃34; 0＆＃34;，＆＃34; 1＆＃34;，...＆＃34; 178＆＃34;]。然后使用以下：
组件中的.ts：
routes : any = responseJson[0].routes;
：
<div *ngFor="let key of Object.keys(routes)">
{{routes.key.budget}}
</div>