Using Typescript to extract multiple arrays from a complex payload

Question

Using Typescript to extract multiple arrays from a complex payload

As a beginner in Typescript, I find the process of extracting multiple arrays from a json payload more challenging than expected. What is the best approach to tackle this? Thanks, Mike.

In this snippet of code, my goal is to isolate both Customer and records into separate arrays.

 this.httpReturn = this.http.post<any>('http://localhost:8400/DynAPI/web/Qry/CustomersQry', 
                                        PostData,  
                                        { headers: requestHeaders, observe: "response"}
                                        ).subscribe ((resp: HttpResponse<any>) => {

resp.body:

{
  "RequestIO": {
    "Customer": [
      {
        "ID": 37,
        "Country": "Austria",
        "Name": "Abc Mountain Bikes",
        "Address": "Alttorstr. 23",
        "City": "Salzburg",
        "State": "West"
      },
      {
        "ID": 1020,
        "Country": "USA",
        "Name": "Abc Sports II",
        "Address": "3233 Pine St",
        "City": "Newtown",
        "State": "CA"
      }
    ],
    "Records": [
      {
        "Count": 2
      }
    ]
  }
}

angular typescript rest httpresponse

Answer 1

Answer №1

If you are solely interested in the response body, there is no need to include the observe: "response" field in your request.

To streamline the process, consider creating interfaces or classes that define the payload structure. Below are examples of interfaces tailored to the JSON data provided. Feel free to adjust the names according to your requirements.

export interface Client {
  ID: number;
  Country: string;
  Name: string;
  Address: string;
  City: string;
  State: string;
}

export interface Entry {
  Count: number;
}

export interface RequestFormat {
  Customer: Client[];
  Records: Entry[];
}

export interface ResponseFormat {
  RequestIO: RequestFormat;
}

Following this setup, data binding for your request will be automated.

this.http.post<ResponseFormat>(
  'http://localhost:8400/DynAPI/web/Qry/CustomersQry',
  PostData
).subscribe(response => {
  console.table(response.RequestIO.Customer);
  console.table(response.RequestIO.Records);
});

Answer 2

If you are solely interested in the response body, there is no need to include the observe: "response" field in your request.

To streamline the process, consider creating interfaces or classes that define the payload structure. Below are examples of interfaces tailored to the JSON data provided. Feel free to adjust the names according to your requirements.

export interface Client {
  ID: number;
  Country: string;
  Name: string;
  Address: string;
  City: string;
  State: string;
}

export interface Entry {
  Count: number;
}

export interface RequestFormat {
  Customer: Client[];
  Records: Entry[];
}

export interface ResponseFormat {
  RequestIO: RequestFormat;
}

Following this setup, data binding for your request will be automated.

this.http.post<ResponseFormat>(
  'http://localhost:8400/DynAPI/web/Qry/CustomersQry',
  PostData
).subscribe(response => {
  console.table(response.RequestIO.Customer);
  console.table(response.RequestIO.Records);
});

Using Typescript to extract multiple arrays from a complex payload

Answer №1

Similar questions

How to limit character input in a Div using Angular 2

Achieving success with Plunker in Angular 2

Chart.js Axis Labels Orientation Guidelines

Organize data in the store using @ngrx/data and @ngrx/entity, rather than within the component (subscriber)

Explanation of Compodoc Documentation Coverage Statement Numbers (1 of 3, 1 of 2, and so on)

problem with mat-progress-bar, BehaviorSubject is malfunctioning

Angular 2 testing encounters an issue with ViewUtils when setBaseTestProviders() is used

When compiling for production, I am encountering an issue where the hashed files are resulting in 404 errors for users when they try to refresh. I am unsure of the best

What is the proper way to define a new property for an object within an npm package?

Remapping compound enum-like constant objects dynamically with type safety in TypeScript

Combining mismatched forms. For instance, form 'A' cannot be attributed to form 'B'

Retrieving Color Values from Stylesheet in TypeScript within an Angular 2 Application

Using Angular to display the initially selected option value in a select dropdown menu

Dynamically assign values to object properties of varying data types using indexing

Error: Trying to access a property that is not declared on an empty object

Final Release Candidate of Angular 2: Loading Route Information in Real-Time from Service

Encountering an issue in the test file when using react-router-dom v6: "The 'history' property is not found on the 'IntrinsicAttributes & RouterProps' type."

Error message TS2693: Trying to use 'T' as a value although it is only meant to be a type

The jquery ui slider in Angular is not triggering the function when changes are made to the slider

When trying to declare a variable, an error of 'implicitly has any type' may occur if the data type is not specified and