Open
Description
Description & Use case
Description:
Add the ability to add null/undefined objects within ArraySchema type
currently, this is restricted by this check in src/types/ArraySchema.ts#182
if (value === undefined || value === null) {
console.error("ArraySchema items cannot be null nor undefined; Use `deleteAt(index)` instead.");
return;
}Usecase:
My backend for a poker game is already made, and an array is made for the player seating:
export class Table {
private _tablePlayers = (Player | null)[];
constructor(numSeats = 4) {
this._tablePlayers = new Array(numSeats).fill(null);
}
}and somebody can join any seat index, meaning the array can look like this:
[
null,
null,
{ username: "player" },
null,
]but when converting to a schema
export class Table extends Schema {
@type([Player]) _tablePlayers = new ArraySchema<Player>();
constructor(numSeats = 4) {
new Array(numSeats).fill(null).forEach((seat, index) => (this._tablePlayers[index] = seat));
}
}this will no longer work, and the array will be empty. as seen in the failing test
alongside null/undefined being integral parts of typescript/javascript, so maybe exclusively for js ecosystem
Optional: Proposed API
maybe a separate schema type, such as NullableArraySchema
export class NullableArraySchema<V = any> implements Array<V>, SchemaDecoderCallbacks { }