Is there a way to declare a choice? Like either this or that.

[OnkelTem]

Say I want a model to be of this type:

type Ingredient = {
  productId: number;
} & (
  | {
      servingId: number;
      amount: number;
    }
  | {
      weight: number;
    }
);

samples:

const ingrWithServing: Ingredient = {
  productId: 1,
  servingId: 1,
  amount: 10,
};

const ingrWithWeight: Ingredient = {
  productId: 1,
  weight: 100,
};

Now how to refactor the ingredientModel to match the Ingredient type:

const ingredientModel = types.model({
  productId: types.number,
  servingId: types.number,
  amount: types.number,
  weight: types.number,
});

Sandbox

[coolsoftwaretyler]

You probably want a union type here.