A TypeScript Class that Refers to Itself

I need help with representing a JSON object in an Angular2 typescript class. The JSON object contains an array of objects of its own type. Here is what the JSON object looks like:

{ 
  "data": {
     "id": 5,
     "type": "taxons",
     "attributes": {
       name: "Vehicles & Vehicle Accessories",
       "taxons": [{
         "id": 8,
         "type": "taxons",
         "attributes": {
            name: "Make",
            "taxons": []
         },
         "id": 9,
         "type": "taxons",
         "attributes": {
            name: "Model",
           "taxons": []
         }
        }]
  }
}

As I create the taxon model in typescript, I am struggling to represent the self-referencing taxon in the taxons array. Currently, my class structure looks like this:

export class Taxon {
  constructor (
    public id: number,
    public name: string,
    public taxons: //I am stuck here.
    )
}

I am looking for how to reference the self in order to achieve something like this:

public taxons: Array<self>

Alternatively, any other suggestions on achieving the desired functionality would be greatly appreciated.

Answer №1

One way to approach this is by utilizing an interface in the following manner:

interface IBar {
    code: number;
    description: string;
    bars?: IBar[];
}

var bar: IBar = {
    code: 101,
    description: 'example 1',
    bars: [
        {code: 202, description: 'child example'}
    ]
}

To allow for flexibility, you can mark the bars property as optional using the ? symbol.

Answer №2

When necessary, utilizing a class is also an option. Simply indicate the specific type.

export class Taxon {
  constructor (
    public id: number,
    public name: string,
    public taxons: Taxon[]
    )
}

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