Default values for model properties overwrite values passed with constructor

[hpawe01]

If the typescript compiler option strictPropertyInitialization is enabled (default in strict mode), it demands default values for our models, e.g.:

...
@JsonApiModelConfig({
    type: 'posts'
})
export class Post extends JsonApiModel {

    @Attribute()
    title: string = 'Placeholder';

}
...

The problem with this is, that when we (and the library) create a new model and passing the attributes through the constructor, the title of the post will still be the default string:

const post = new Post(datastore, {title: 'My first'})`;

console.log(post.title) // => "Placeholder"

The reason for this is, that the constructor of the base class (JsonApiModel), that is responsible for setting the passed attributes, is called before the default values of the extending class (Post) are set. That is just the way, typescript code is compiled to javascript (see example).

The only option (that I see) is, to use the non null assertion operator (!) for all my properties that shouldn't be undefined.

title!: string;

Does anybody has another solution for this issue?