"Working with Typescript: Utilizing a specific attribute in a response to assign data to a table data source

Question

"Working with Typescript: Utilizing a specific attribute in a response to assign data to a table data source

I am working on a straightforward typescript function to retrieve a list along with its status, and my model is defined as follows:

export interface CashPaymentModel  {
  success: boolean;
  data: CashSpendAdHocDTO[];
}
export interface CashSpendAdHocDTO  {
  dueDate: string;
  gross: string;
  moveStageName: string;
  paidDate: string;
  service: string;
  status: string;
  timestamp: string;
  type: string;
}

This is how my service method looks like:

getCashPayments(policyVersionId: number, employeeId: number): Observable<CashPaymentModel> {
    return this.http.get<CashPaymentModel>(`/api/v1/policy/configuration/versions/${policyVersionId}/details?employeeId=${employeeId}`);
  }

Now, I need to display the list from the response (the second attribute in the response) in a table within the template. How do I assign this table's data source?

tableDataSource: Observable<CashPaymentModel>;

testMethod() {
    this.tableDataSource = this.cashPaymentService.getCashPayments(this.policyVersionId, this.employeeId).subscribe((data: CashPaymentModel) => {
      this.tableDataSource = data; .......BLA BLA BLA
    });
  }

Could you help me understand how to correctly assign tableDataSource from the second attribute of the response in TypeScript?

javascript angular typescript

Answer 1

Answer №1

If you take a look at your interface layout, you might want to consider implementing the following code snippet:

testMethod() {
    this.tableDataSource = this.cashPaymentService.getCashPayments(this.policyVersionId, this.employeeId).subscribe((data: CashPaymentModel) => {
      this.tableDataSource = data.data;
    });
}

Answer 2

If you take a look at your interface layout, you might want to consider implementing the following code snippet:

testMethod() {
    this.tableDataSource = this.cashPaymentService.getCashPayments(this.policyVersionId, this.employeeId).subscribe((data: CashPaymentModel) => {
      this.tableDataSource = data.data;
    });
}

Answer 3

Answer №2

To improve handling of responses, start by filtering out undefined ones and assigning the tableDataSource to the data attribute of response in case of a successful result (based on your interface).

Consider implementing the following approach:

tableDataSource: Observable<CashPaymentModel>;

testMethod() {
    this.tableDataSource = this.cashPaymentService.getCashPayments(this.policyVersionId, this.employeeId).pipe(
      filter(res => res !== undefined),
    ).subscribe((res: CashPaymentModel) => {
      if (res.success) {
        this.tableDataSource = res.data;
      } else {
        // handle false success
        // it's recommended not to return 200 response code for false successes and manage them in the 
        // error block of the subscription
      }
    });
  }

Answer 4

To improve handling of responses, start by filtering out undefined ones and assigning the tableDataSource to the data attribute of response in case of a successful result (based on your interface).

Consider implementing the following approach:

tableDataSource: Observable<CashPaymentModel>;

testMethod() {
    this.tableDataSource = this.cashPaymentService.getCashPayments(this.policyVersionId, this.employeeId).pipe(
      filter(res => res !== undefined),
    ).subscribe((res: CashPaymentModel) => {
      if (res.success) {
        this.tableDataSource = res.data;
      } else {
        // handle false success
        // it's recommended not to return 200 response code for false successes and manage them in the 
        // error block of the subscription
      }
    });
  }

"Working with Typescript: Utilizing a specific attribute in a response to assign data to a table data source

Answer №1

Answer №2

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