I have a question about reverseMap() function.

[cesc1802]

I create a profile by using function createMap(), and i need to convert some field has type Date to string. Now, I want to when i receive data from client using reverseMap() with convert again string to Date. Pls help me provide some example. Thanks

[nartc]

class Foo {
   @AutoMap()
   date: Date;
}

class FooDto {
   @AutoMap()
   date: string;
}

When working with Date Time, it's quite tricky because AutoMapper cannot determine how you want to convert a Date to a string (https://automapper.netlify.app/docs/usages/features/date-time). When you have a conversion from Date <-> string, it's best to use mapFrom() to handle these cases.

Mapper.createMap(Foo, FooDto)
   .forMember(d => d.date, mapFrom(s => s.date.toDateString()))
   .reverseMap()
   .forPath(s => s.date, mapFrom(d => new Date(d.date)));

If you have a more complex use-case for this type of conversion, then I'd suggest to use a Converter (https://automapper.netlify.app/docs/usages/mapping-configuration/for-member/converter)

export class StringDateConverter extends Converter<string, Date> {
   convert(source: string): Date {
      // maybe run your validation on the date string
      return new Date(source);
   }
}

export class DateStringConverter extends Converter<Date, string> {
   convert(source: Date): string {
      return source.toDateString();
   }
}

Mapper.createMap(Foo, FooDto)
   .forMember(d => d.date, convertUsing(new DateStringConverter(), s => s.date))
   .reverseMap()
   .forPath(s => s.date, convertUsing(new StringDateConverter(), d => d.date));

Hopefully you find these information helpful!

[cesc1802]

@nartc thanks for support as soon. i will completed follow your sample