0

我正在尝试通过自定义过滤器从 JSON 响应中返回唯一值。

数据：

[
{
    "SHFUserID": "400",
    "AlertID": "12",
    "TickerID": "4512",
    "Ticker": "GOOG",
    "Active": "1",
    "Status": "2"
},
{
    "SHFUserID": "400",
    "AlertID": null,
    "TickerID": "4512",
    "Ticker": "GOOG",
    "Active": null,
    "Status": null
},
{
    "SHFUserID": "400",
    "AlertID": null,
    "TickerID": "10190",
    "Ticker": "IBM",
    "Active": null,
    "Status": null
}
]

筛选：

.filter('uniqueTickers', function() {
return function(tickers) {
    var tags = {};
    angular.forEach(tickers, function(obj) {

      if(!(obj.Ticker in tags)){
        tags[obj.Ticker] = {id: obj.TickerID, name:obj.Ticker}

        if(!tags[obj.Ticker].pending){
          tags[obj.Ticker].pending = 0;
        }
        if(!tags[obj.Ticker].settled){
          tags[obj.Ticker].settled = 0;
        }
        if(!tags[obj.Ticker].order){
          tags[obj.Ticker].order = 3;
        }
      }
  if(obj.Status === "1"){
    tags[obj.Ticker].pending = 1;
    if(tags[obj.Ticker].order > 2){
      tags[obj.Ticker].order = 2;
    }
  }
  if(obj.Status === "2"){
    tags[obj.Ticker].settled = 1;
    if(tags[obj.Ticker].order > 1){
      tags[obj.Ticker].order = 1;
    }
  };
    });
return tags;
};

html:

 Search: <input ng-model="query">
  Sort by:
  <select ng-model="orderProp">
    <option value="name">Alphabetical</option>
    <option value="order">Alert Status</option>
  </select>
  <ul class="tickerList">
    <li ng-repeat="ticker in tickers | filter:query | orderBy:orderProp | uniqueTickers">
      <a href="#/ticker/{{ticker.id}}">{{ticker.name}}</a>
      <p>{{ticker}}</p>
    </li>
  </ul>

但结果看起来像：

GOOG
{"id":"4512","name":"GOOG","pending":0,"settled":0,"order":3}

IBM
{"id":"10190","name":"IBM","pending":0,"settled":0,"order":3}

代替：

GOOG
{"id":"4512","name":"GOOG","pending":0,"settled":1,"order":1}

IBM
{"id":"10190","name":"IBM","pending":0,"settled":0,"order":3}

目标是保持结果集的唯一性，但如果该代码的任何记录处于未决或已结算，则将“待处理”或“已结算”设置为 true。

4

1 回答 1

0

经过一番讨论，答案是通过在第一部分逻辑周围添加检查来避免过度使用现有数据，如下所示：

if(!(obj.Ticker in tags)){
    tags[obj.Ticker] = {id: obj.TickerID, name:obj.Ticker};

    if(!tags[obj.Ticker].pending){
      tags[obj.Ticker].pending = 0;
    }
    if(!tags[obj.Ticker].settled){
      tags[obj.Ticker].settled = 0;
    }
    if(!tags[obj.Ticker].order){
      tags[obj.Ticker].order = 3;
    }
}
于 2013-09-11T21:05:40.497 回答