Polymorphic object array support

[pyunghwa]

Hi! I have one more question.
Does it support polymorphic object array to mapping? If supported, how to do? If not, any plan?

[pverscha]

Hi Chris,

The package currently supports mapping of arrays with custom objects, like this:

@ReadArray(MyCustomObject)
@UpdateArray(MyCustomObject)
@StoreArray(MyCustomObject)
private _data: MyCustomObject[];

At this moment it's however not possible to pass objects that inherit from MyCustomObject without changing the signature of the decorators, due to limitations posed by the reflection metadata in TypeScript. Can you give me an example of what you're trying to achieve?

Thanks!

[pyunghwa]

Hi, @pverscha :)
My case is to pass objects that inherit from specified object.

Like this.

class Part {
}
class RoofPart extends Part {
}
class ColumnPart extends Part {
}
class FloorPart extends Part {
}
 :
class All {
  part: Part[] = [
    new RoofPart(),
    new ColumnPart(),
    new FloorPart()
    :
  ];
}

This RoofPart, ColumnPart, FloorPart and so on have different variables and functions.
Do you plan to support polymorphic object array?

If so, please refer.. I looked into some package that support polymorphic object array. These are just mapping Json to Typescript.

1. json2typescript : supports Custom converter, like this answer https://stackoverflow.com/questions/46601348/json-to-typescript-object-inheritance
   But, this package is too, too slow.

2. TypedJSON : supports polymorphic behavior by Json data added class delimiter(__type) and class annotations.
   How to achieve polymorphic behavior? JohnWeisz/TypedJSON#88
   Example code is https://github.com/JohnWeisz/TypedJSON/blob/master/spec/polymorphism.spec.ts
   It has to add class delimiter into Json data, and the annotation for polymorphic objects is located strangely.

Thanks.

[pverscha]

Hi Chris,

Sorry for the delay in getting back to you. I try to take a look at this today or tomorrow and implement some of the required features if possible.