[BUG] Enum on nested class causes stack loop error when serialized

Information

• Version: 6.64.1

I try to use an enum property on my nested model and I have a “RangeError: Maximum call stack size exceeded” when I serialize it. I don’t have error when the enum property is just plain text not a type.

Example

My model:

import { Enum, Property, Required } from "@tsed/schema";

export enum EnumValue {
  One = "one",
  Two = "two",
}

export class NestedEnum {
  @Required()
  @Enum(EnumValue)
  value: EnumValue;
}

export class TestNestedEnum {
  @Property()
  nested: NestedEnum;
}

export class NestedEnum2 {
  @Required()
  @Enum("one", "two")
  value: "one" | "two";
}

export class TestNestedEnum2 {
  @Property()
  nested: NestedEnum2;
}

My controller:

import {Controller, Get} from "@tsed/common";
import {Tags} from "@tsed/schema";
import { EnumValue, NestedEnum, TestNestedEnum, NestedEnum2, TestNestedEnum2 } from "../models/TestNestEnum";

@Controller("/enum")
@Tags("enum")
export class TestEnumController {
  @Get("/bug")
  async getBug(): Promise<TestNestedEnum> {
    const test = new TestNestedEnum();
    const nested = new NestedEnum();
    nested.value = EnumValue.One;
    test.nested = nested;
    return test;
  }

  @Get("/ok")
  async getOK(): Promise<TestNestedEnum2> {
    const test = new TestNestedEnum2();
    const nested = new NestedEnum2();
    nested.value = EnumValue.One;
    test.nested = nested;
    return test;
  }
}

If I call /enum/ok no problem, but /enum/bug throws this error when the model is serialized:

[ERROR] [TSED] - RangeError: Maximum call stack size exceeded
    at serialize (...\node_modules\@tsed\json-mapper\src\utils\serialize.ts:132:23)
    at ...\node_modules\@tsed\json-mapper\src\utils\serialize.ts:100:14
    at Array.reduce (<anonymous>)
    at toObject (...\node_modules\@tsed\json-mapper\src\utils\serialize.ts:97:35)
    at serialize (...\node_modules\@tsed\json-mapper\src\utils\serialize.ts:154:68)
    at ...\node_modules\@tsed\json-mapper\src\utils\serialize.ts:100:14
    at Array.reduce (<anonymous>)
...

Acceptance criteria

• A nested enum can be serialized

[Romakita]

🎉 This issue has been resolved in version 6.73.2 🎉

The release is available on:

• v6.73.2
• GitHub release

Your semantic-release bot 📦🚀

[Romakita]

🎉 This issue has been resolved in version 7.0.0-alpha.2 🎉

The release is available on:

• v7.0.0-alpha.2
• GitHub release

Your semantic-release bot 📦🚀