app/models/decorators.ts

import ApiResource from "~/models/ApiResource";

/**
 * Decorates an ApiResource's property to signal it as a field that is provided
 * as an IRI or an array of IRI by the API
 *
 * If the property is decorated, the HydraNormalizer will parse the IRI when de-normalizing
 * to get the id(s), then re-encode it as IRI(s) when re-normalizing.
 */
export function IriEncoded (
    apiResource: typeof ApiResource
): PropertyDecorator {
    return (target: Object, propertyKey: string | symbol) => {
        //@ts-ignore
        const self = target.$self()

        if (!self.hasOwnProperty("relations")) {
            self.relations = {}
        }

        //@ts-ignore
        self.relations[propertyKey] = apiResource
    }
}