[Decorator] Model deserialization

[Romakita]

@BodyParams can deserialize an entire object and restore his methods if the type is provided via ReflectMetadata and Typescript.

Example:

@Controller("/")
export class EventCtrl {

     @Post("/")
     save(@BodyParams() event: Event){
          console.log(event instanceof Event); // true
     } 

     //OR
     @Post("/")
     save(@BodyParams('event') event: Event){}
}

[alexproca]

Hi!

Can you provide more details on how do you plan to deserialize an entire object and restore his methods ? I have had a similar problem an chose composition of the object with the actual class.

Thanks

[Romakita]

Hi Alex,

I've found this npm project on github: https://github.com/jf3096/json-typescript-mapper

I didn't know if I'll use the module or I'll develop my own lib...

[alexproca]

Maybe it would be interesting to let people add their own converters. For example the converter could be loaded in a similar manner like services for a certain type.

Example:

interface Converter<T> {

   deserialize(data): T;
   serialize(object: T): string;

}

@Converter()
class MyFooConverter<Foo> implements Converter {
.....
}

[Romakita]

Hum... good idea :)

[Romakita]

preversion v1.3.0-4 are available to test this feature.

With this version you can:

1. Define a model:

class MyModel {
    name: string;

    @JsonProperty({name: 'last-name'})
    lastName: string;
     
    @JsonProperty()
    birthDate: Date;

    @JsonProperty({use: Task})
    tasks: Task[];
}

class Task {
     subject: string;
     rate: number;
}

Theses ES6 collections can be used : Map and Set.
Map will be serialized as an object and Set as an array.

2. Define your own Converter

@Converter(Date)
class DateConverter {
     deserialize(data: string, targetType?: any,  baseType?: any)  {
           return new Date(string);
     }
     
    serialize(data: Date) {
           return data.toISOString();
    }
}

targetType and baseType is set when you want convert an Array, Map or Set class. targetType is the collection and baseType the type for each item.
By default Date, Array, Map and Set have a custom Converter.

ServerLoader.scan method can be used to auto import all custom converter in your project.