如何搜索ngFor结果?

时间:2019-05-30 14:22:54

标签: angular angular5

我有一个JSON对象,我需要对其进行迭代并包括一个搜索功能,该功能可显示键和在该键中搜索到的值。

我通过使用管道并通过遍历键及其值来实现这一点。

COMPONENT.HTML:

SapHealth

COMPONENT.TS:

<input type="text" class="form-control" placeholder = "Search"[(ngModel)] = "query" id = "listSearch"  #search >

      <ul>
      <li * ngFor="let key of objectKey()" >
        <span>{{ key }}</span>
          < table >
          <tr * ngFor="let item of (testData[key] | LockFilter:'appName': search.value) as result" >
            <td>{{ item.appName }}</td>
              < /tr>
              < /table>
              < /li>
              < /ul>  

PIPE.TS:

testData = {
  "MyCat1": [
    {
      "appName": "Myapp1",
      "appCatName": "MyCat1"
    },
    {
      "appName": "Myapp2",
      "appCatName": "MyCat1"
    }
  ],
  "MyCat2": [
    {
      "appName": "Myapp3",
      "appCatName": "MyCat2"
    },
    {
      "appName": "Myapp4",
      "appCatName": "MyCat2"
    }
  ]
}
objectKey() {
  return Object.keys(this.testData);
}
  

搜索前的预期结果:   MyCat1:   Myapp1   Myapp2

     

MyCat2:   Myapp3   Myapp4

     

搜索后:(搜索字符串“ 1”)   MyCat1:   Myapp1

Current Output Image Current Output Image

2 个答案:

答案 0 :(得分:0)

尝试一下:

<input [(ngModel)]="search" />
<ul>
    <li *ngFor="let key of objectKey()" [hidden]="!(testData[key] | LockFilter:'appName': search).length">
        <span>{{ key }}</span>
        <table>
            <tr *ngFor="let  item of (testData[key] | LockFilter:'appName': search) as result">
                <td> {{ item.appName }}</td>
            </tr>
        </table>
    </li>
</ul>

Working Demo

答案 1 :(得分:0)

尝试一下

  // check if exists and will return the keys
  objectKey(value) {
    return Object.entries(this.testData)
      .filter(data=> (data[1].filter(item=> item[value].includes(this.search)).length))
      .map([KEY, VAL] => KEY)
  }

HTML(相同代码)

  <ul>
    <li *ngFor="let key of objectKey('appName')"  >
      <span   >{{ key }}</span>
        <table>
          <tr *ngFor="let  item of (testData[key] | LockFilter:'appName': search) as result" >
              <td >   {{ item.appName }}</td>
          </tr>
        </table>
    </li>
  </ul>  

Working Demo