Mapping not found error when using nullSubstitution on array property

[LennartH]

Is there an existing issue for this?

• I have searched the existing issues

Describe the issue

If you have to explicitly provide a properties type (e.g. an enum array) and you have to configure a nullSubstitution in the mapping, the following error is thrown when trying to map an object:

[AutoMapper] Mapping is not found for function String() { [native code] } and function String() { [native code] }
[AutoMapper] 
Error at "values" on Bar ({"name":"foo","id":"id"})
---------------------------------------------------------------------
Original error: Error: Mapping is not found for function String() { [native code] } and function String() { [native code] }
Error: 
Error at "values" on Bar ({"name":"foo","id":"id"})
---------------------------------------------------------------------
Original error: Error: Mapping is not found for function String() { [native code] } and function String() { [native code] }

The error only occurs if the property has a value or if the nullSubstitution resolves to a non-empty array and the specified type is built-in (e.g. String or Object). I think the problem is that nullSubstitution (and undefinedSubstitution and condition) call mapper.mapArray which calls getMapping without applying the 'identifier checks' used by map.

Models/DTOs/VMs

enum Enum {
  Value1 = 'Value1',
  Value2 = 'Value2',
}

class Foo {
  @AutoMap(() => [String])
  values: Enum[];
}

class Bar {
  @AutoMap(() => [String])
  values: Enum[];
}

Mapping configuration

export const mapper: Mapper = createMapper({
  strategyInitializer: classes(),
  namingConventions: new CamelCaseNamingConvention(),
});
createMap(mapper, Foo, Bar,
  forMember((bar) => bar.values, nullSubstitution([])),
);

Steps to reproduce

const foo = new Foo();
foo.values = [Enum.Value1];
const bar = mapper.map(foo, Foo, Bar);
console.log(bar);

Expected behavior

No error should occur, since built-in types should have built-in mappings.

Screenshots

No response

Minimum reproduction code

No response

Package

• I don't know.
• @automapper/core
• @automapper/classes
• @automapper/nestjs
• @automapper/pojos
• @automapper/mikro
• @automapper/sequelize
• Other (see below)

Other package and its version

No response

AutoMapper version

8.3.6

Additional context

No response