angular/ts/json：从总记录中如何知道匹配特定值的计数

根据下面的数据，如何获得分配给嵌套记录而非父记录的适用影响、不适用影响和FYI影响的计数

因此，预期结果将是：

For 1st Record
    Applicable:2 Not Applicable: 1
For 2nd Record
    Applicable:1 Not Applicable: 1

db.json

[
  {
    "id": 1,
    "first_name": "Male",
    "last_name": "Record",
    "email": "male.record@gmail.com",
    "gender": "Male",
    "dob": "01-01-1987",
    "impact": "Not Applicable",
    "score": "Updated",
    "checked": false,
    "assigned_to": [
      {
        "co_score": 54,
        "dl": "CAT1",
        "sub_impact": "Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      },
      {
        "co_score": 20,
        "dl": "CAT2",
        "sub_impact": "Not Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      },
      {
        "co_score": 99,
        "dl": "CAT1",
        "sub_impact": "Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      }
    ]
  },
  {
    "id": 2,
    "first_name": "Female",
    "last_name": "Record",
    "email": "female.record@gmail.com",
    "gender": "Female",
    "dob": "31-12-1987",
    "impact": "Not Applicable",
    "checked": false,
    "score": "Updated",
    "assigned_to": [
      {
        "co_score": 54,
        "dl": "CAT1",
        "sub_impact": "Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      },
      {
        "co_score": 20,
        "dl": "CAT2",
        "sub_impact": "Not Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      }
    ]
  },
  {
    "id": 3,
    "first_name": "Male",
    "last_name": "Record Another",
    "email": "male.recordanother@gmail.com",
    "gender": "Male",
    "dob": "31-10-2017",
    "impact": "Not Applicable",
    "checked": false,
    "score": 25,
    "assigned_to": [
      {
        "co_score": 100,
        "dl": "CAT3",
        "sub_impact": "Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      },
      {
        "co_score": 2,
        "dl": "CAT2",
        "sub_impact": "Not Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      }
    ]
  },
  {
    "first_name": "Male",
    "last_name": "One More Record",
    "email": "male.onemorerecord@gmail.com",
    "gender": "Male",
    "dob": "08-08-1984",
    "impact": "Applicable",
    "id": 6,
    "checked": false,
    "score": 67,
    "assigned_to": [
      {
        "co_score": 4,
        "dl": "CAT1",
        "sub_impact": "Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      },
      {
        "co_score": 85,
        "dl": "CAT3",
        "sub_impact": "Not Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      }
    ]
  },
  {
    "first_name": "Female",
    "last_name": "Another Record",
    "email": "female.anotherrecord@gmail.com",
    "gender": "Female",
    "dob": "2000-07-15",
    "impact": "Applicable",
    "id": 7,
    "checked": false,
    "score": 85,
    "assigned_to": [
      {
        "co_score": 34,
        "dl": "CAT3",
        "sub_impact": "Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      },
      {
        "co_score": 55,
        "dl": "CAT2",
        "sub_impact": "Not Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      }
    ]
  },
  {
    "id": 8,
    "first_name": "New",
    "last_name": "Record",
    "email": "new.record@gmail.com",
    "gender": "Male",
    "dob": "2020-12-17",
    "impact": "Not Applicable",
    "score": 60,
    "assigned_to": [
      {
        "co_score": 94,
        "dl": "CAT1",
        "sub_impact": "Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      },
      {
        "co_score": 85,
        "dl": "CAT3",
        "sub_impact": "Not Applicable",
        "comments": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book."
      }
    ]
  }
]

app.component.ts

getApplicableCounts() {
this.impactCount = {applicable:0, notapplicable:0, fyi: 0}
this.allUser.forEach(row => {
  row.assigned_to.forEach(sub => {
    console.log(sub.sub_impact)
    if (sub.sub_impact === 'Applicable') {
      this.impactCount.applicable++;
    } else if (sub.sub_impact === 'Not Applicable') {
       this.impactCount.notapplicable++;
    } else if (sub.sub_impact === 'FYI') {
      this.impactCount.fyi++;
    }
  });
});
getLatestUser() {
    this.commonService.getAllUser().subscribe((response) => {
      this.allUser = response;
      this.totalRecords = this.allUser.length;
      console.log(this.totalRecords);
    })
  }
ngOnInit() {
    this.getLatestUser();
  }

我应该在getLatestUser函数中写些什么来显示适用的、不适用的、供参考的计数：

当我在解决另一个问题时，这在这里得到了解决。要获得影响计数，您需要添加以下变量和函数：

impactCount = {
   applicable: 0,
   notApplicable: 0,
   fyi: 0
};

getImpactCounts() {
  this.impactCount = {applicable: 0, notApplicable: 0, fyi: 0};

  this.allUser.forEach(row => {
    if (row.impact === 'Applicable') {
      this.impactCount.applicable++;
    } else if (row.impact === 'Not Applicable') {
      this.impactCount.notApplicable++;
    } else if (row.impact === 'FYI') {
      this.impactCount.fyi++;
    }
  });
}

然后将其添加到html中

<div>
  Applicable: {{impactCount.applicable}}
  Not Applicable: {{impactCount.notApplicable}}
  FYI: {{impactCount.fyi}}
</div>

适用：{{impactCount.applicative}
不适用：{{impactCount.notapplicatable}
仅供参考：{{impactCount.FYI}

---

然后，您只需从

getLatestUser（）

函数调用

getapplicatablecounts（）

，并随时更改数据（几乎所有crud调用）。这是另一个问题的注释部分中也链接的工作。

我需要您的帮助来显示嵌套节点影响的计数，而不是父节点。我应该在函数中做哪些更改？我尝试了getApplicatableCounts（）{this.impactCount={applicative:0，notapplicatable:0，fyi:0}this.allUser.forEach（row=>{if（row.sub_impact=='applicative'）{this.impactCount.applicative++}否则if（row.sub_impact=='notapplicative'））{this.impactCount.notapplicatable++}否则如果（row.sub_impact==='FYI'）{this.impactCount.FYI++}}它不会显示counttry行。assigned_to.sub_impact也不会显示结果assigned_to是一个数组。您需要在它们上面循环

row.assigned_to.forEach（sub=>{console.log（sub.sub_impact）}

此循环将位于this.allUser.forEach循环下？this.allUser.forEach（row=>{row.assigned_to.forEach（sub=>{console.log（sub.sub_impact）if（sub.sub_impact=='applicative'）{this.impactCount.applicative++}如果（sub.sub_impact=='notapplicative'），则{this.impactCount.notapplicatable++；}如果（sub.sub_impact==='FYI'）{this.impactCount.FYI++；}}）；