Errors

01

Missing samples in iterable. In order to let JTC know which values are valid for the iterables, you should push at least one sample to each iterable.

Wrong

new ArrayMeta([] as any);
new MapMeta([] as any);

Right

new ArrayMeta([new NumberField()]);
new MapMeta([new NumberField()]);

02

builder must create custom classes, not JS native

Wrong

new ObjectMeta({ builder: Number, fields: {} });

Right

class User {
   public id: string;
}

const USER_META = new ObjectMeta({
   builder: User,
   fields: {
      id: new StringField()
   }
});

03

Second attempt to define meta (new ObjectMeta) with already used builder

Wrong

class User {
   public id: string;
}

const USER_META = new ObjectMeta({
   builder: User,
   fields: {
      id: new StringField()
   }
});

const USER_META_1 = new ObjectMeta({
   builder: User,
   fields: {
      id: new StringField()
   }
});

Right

class User {
   public id: string;
}

const USER_META = new ObjectMeta({
   builder: User,
   fields: {
      id: new StringField()
   }
});

04

Iterable can have only one inner iterable entry

Wrong

new ArrayMeta([
    new NumberArrayField(),
    new NumberArrayField(),
]);

new MapMeta([
    new NumberArrayField(),
    new NumberArrayField(),
]);

Right

new ArrayMeta([
    new NumberArrayField(),
]);

new MapMeta([
    new NumberArrayField(),
]);

05

Meta for the parrent class should be created before creating meta for the child class

Wrong

class Id {
   public id: string;
}

class User extends Id {
   public name: string;
}

new ObjectMeta({
   builder: User,
   fields: {
      id: new StringField(),
      name: new StringField(),
   }
});

Right

class Id {
   public id: string;
}

const ID_META = new ObjectMeta({
   builder: Id,
   getId: ({ id }) => id,
   fields: {
      id: new StringField(),
   }
});

class User extends Id {
   public name: string;
}

new ObjectMeta({
   builder: User,
   fields: {
      id: new StringField(),
      name: new StringField(),
   }
});

06

Can't get meta from such value

JTC.getMeta will work only with instances which constructor was used during new ObjectMeta call. In all other cases error will be thrown.

Wrong

class User {
   public id = ``;
   public isAdmin = false;
}

JTC.getMeta({});
JTC.getMeta(1);
JTC.getMeta(``);
JTC.getMeta(null);
JTC.getMeta(undefined);
JTC.getMeta(false);
JTC.getMeta(new User());

Right

class User {
   public id: string;
}

const USER_META = new ObjectMeta({
   builder: User,
   fields: {
      id: new StringField()
   }
});

const meta = JTC.getMeta(new User());

console.log(meta === USER_META); // true