nestJS with typeorm : #Expose not work when entity nested - nested

Question

In my project,
there are two entities; Profile and Project.
Entity Project has field "collaborators", which is array of Profile. -> code
Entity Profile has two #Expose fields, "nickname" and "id", which is well-shown when I call GET Profile API.
-> code
-> see result of dev.collact.io/api/profiles/8.
{
"createdDt": "2021-10-05T14:51:29.312Z",
"updatedDt": "2021-10-05T14:51:29.312Z",
"deletedDt": null,
"photo": "https://collact-dev.s3.ap-northeast-2.amazonaws.com/profiles/oj2UBVFXCTnZ9z9mmy8UtU-59FD9F11-1812-4758-85B7-4347A4CE0FEF.png",
"contact": null,
"intro": null,
"detail": null,
"email": null,
"phone": null,
"projects": [],
"nickname": "Tester",
"id": 8
}
However, when I call GET Project API, the exposed fields, "nickname" and "id" does not come up inside "collaborators".
-> see result of dev.collact.io/api/projects/72.
{
"createdDt": "2021-12-20T18:14:22.277Z",
"updatedDt": "2021-12-20T18:14:22.277Z",
"deletedDt": null,
"id": 72,
"photos": [
{
"createdDt": "2021-12-20T18:14:22.321Z",
"updatedDt": "2021-12-20T18:14:22.321Z",
"deletedDt": null,
"id": 26,
"photo": "https://collact-dev.s3.ap-northeast-2.amazonaws.com/projects/cWk3fQEoperPxAS6T1QV5K.png"
}
],
"collaborators": [
{
"createdDt": "2021-10-03T14:53:20.165Z",
"updatedDt": "2021-12-09T13:26:11.870Z",
"deletedDt": null,
"photo": "https://collact-dev.s3.ap-northeast-2.amazonaws.com/profiles/oj2UBVFXCTnZ9z9mmy8UtU-59FD9F11-1812-4758-85B7-4347A4CE0FEF.png",
"contact": "ㅆZz",
"intro": "Zz",
"detail": "Asdfasdf",
"email": null,
"phone": null
}
],
"areas": [
{
"createdDt": "2021-07-12T13:28:12.063Z",
"updatedDt": "2021-07-12T13:28:12.063Z",
"deletedDt": null,
"id": 1,
"area": "drawing"
},
{
"createdDt": "2021-07-12T13:28:12.063Z",
"updatedDt": "2021-07-12T13:28:12.063Z",
"deletedDt": null,
"id": 2,
"area": "design"
}
],
"title": "title",
"detail": ""
}
I already tried 2 solutions but does not work as I want.
First, I tried to add #Type(() => Profile) to "collaborators" in Project entity but had no difference.
Second, I thought join only worked until collaborators, so needed to join until collaborators.user like below.
findOne(id: string): Promise<Project> {
return this.projectsRepository.findOne(id, {
relations: ['collaborators', 'collaborators.user', 'areas', 'photos'],
});
}
However, this time, "nickname" and "id" does not come up for collaborators. Rather, nested user object as a whole, comes up.
{
"createdDt": "2021-10-03T11:49:51.052Z",
"updatedDt": "2021-10-03T11:49:51.052Z",
"deletedDt": null,
"id": 4,
"title": "title2",
"detail": "",
"collaborators": [
{
"createdDt": "2021-10-03T11:46:20.347Z",
"updatedDt": "2021-10-03T11:46:20.347Z",
"deletedDt": null,
"photo": null,
"contact": null,
"intro": null,
"detail": null,
"email": null,
"phone": null,
"user": {
"createdDt": "2021-10-03T11:46:20.347Z",
"updatedDt": "2021-10-03T11:46:20.347Z",
"deletedDt": null,
"id": 1,
"nickname": "string1",
"isSuperuser": false,
"isStaff": false,
"isActive": true,
"loginPlatform": "manual",
"uid": "string",
"token": "string",
"lastLoginDt": "2021-10-03T11:46:20.347Z"
}
}
],
"areas": [
{
"createdDt": "2021-10-03T11:44:05.962Z",
"updatedDt": "2021-10-03T11:44:05.962Z",
"deletedDt": null,
"id": 1,
"area": "drawing"
},
{
"createdDt": "2021-10-03T11:44:05.962Z",
"updatedDt": "2021-10-03T11:44:05.962Z",
"deletedDt": null,
"id": 2,
"area": "design"
}
],
"photos": []
}
Can anybody help?

Answer 1

adding #UseInterceptors(ClassSerializerInterceptor) to the controller was the key.
Also, the second solution I mentioned above (join) should be preceded.