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Erythros
Erythros

Reputation: 137

Working with types in typescript

I would like to declare an object that has the following structure

public car = {
    price: 20000,
    currency: EUR,
    seller: null,
    model: {
        color: null,
        type: null,
        year: null
    } as Array<object>
};

Then, when I work with this object, I have something like

public addProduct(typeId: number): void {
    this.car.model.push({type: typeId});
}

The problem I am facing is when I defined the model object, as using as Array<object> generates something alone the lines

Type '{ color: null; type: null; year: null; }' cannot be converted to type 'object[]'. Property 'length' is missing in type '{ color: null; type: null; year: null; }

I couldn't find a proper why to define this. It was important to use push to generate an "empty" object to which I can add the attributes from the view.

Upvotes: 0

Views: 49

Answers (1)

anteAdamovic
anteAdamovic

Reputation: 1468

You can create an object in typescript like 

let car: any = {
  price: 20000,
  currency: 'EUR',
  seller: null,
  model: [
    { color: 'red', type: 'one', year: '2000' }, 
    { color: 'blue', type: 'two', year: '2001' }
  ]
}

Then you can do what you wanted 

car.model.push({ color: 'green', type: 'three', year: '2002' });

to add a new model, or to fetch one

car.model[0] // returns { color: 'red', type: 'one', year: '2000' }

Another alternative would be to create a class instead of an object

export class Car {
  public price: number;
  public currency: string;
  public seller: string;
  public models: any[];

  constructor() { }
}

And then put all the appropriate methods inside the class.

Upvotes: 1

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