fix(plugin): wrap enum property values in functions

- Check identifierText.includes('await ') instead of typeName.includes('import(')
- Update test fixtures to conditionally add async based on esmCompatible
- Add regression test for same-file array types (#3630)

Author: seonggukchoi

lib/plugin/visitors/model-class.visitor.ts

@@ -536,8 +536,14 @@ export class ModelClassVisitor extends AbstractFileVisitor {
       this._typeImports
     );
 
+    // Only add async modifier if the identifier contains await (for ESM dynamic imports)
+    const identifierText = identifier.text || '';
+    const modifiers = identifierText.includes('await ')
+      ? [factory.createModifier(ts.SyntaxKind.AsyncKeyword)]
+      : undefined;
+
     const initializer = factory.createArrowFunction(
-      undefined,
+      modifiers,
       undefined,
       [],
       undefined,
@@ -714,6 +720,7 @@ export class ModelClassVisitor extends AbstractFileVisitor {
     }
 
     const typeReferenceDescriptor = { typeName: getText(type, typeChecker) };
+
     const enumIdentifier = typeReferenceToIdentifier(
       typeReferenceDescriptor,
       hostFilename,
@@ -723,7 +730,22 @@ export class ModelClassVisitor extends AbstractFileVisitor {
       this._typeImports
     );
 
-    const enumProperty = factory.createPropertyAssignment(key, enumIdentifier);
+    // Only add async modifier if the identifier contains await (for ESM dynamic imports)
+    const enumIdentifierText = enumIdentifier.text || '';
+    const modifiers = enumIdentifierText.includes('await ')
+      ? [factory.createModifier(ts.SyntaxKind.AsyncKeyword)]
+      : undefined;
+
+    const initializer = factory.createArrowFunction(
+      modifiers,
+      undefined,
+      [],
+      undefined,
+      undefined,
+      enumIdentifier
+    );
+
+    const enumProperty = factory.createPropertyAssignment(key, initializer);
 
     if (isArrayType) {
       const isArrayKey = 'isArray';

test/plugin/fixtures/create-cat-alt.dto.ts

@@ -63,7 +63,7 @@ export class CreateCatDto2 {
         _CreateCatDto2_privateProperty.set(this, void 0);
     }
     static _OPENAPI_METADATA_FACTORY() {
-        return { name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3 }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: Status }, breed: { required: false, type: () => String }, nodes: { required: true, type: () => [Object] }, alias: { required: true, type: () => Object }, numberAlias: { required: true, type: () => Number, description: "NumberAlias" }, union: { required: true, type: () => Object }, intersection: { required: true, type: () => Object }, str: { required: true, type: () => [String] }, rawArray: { required: true, type: () => [({ foo: { required: true, type: () => String } })] }, nested: { required: true, type: () => ({ first: { required: true, type: () => String }, second: { required: true, type: () => Number }, status: { required: true, enum: Status }, tags: { required: true, type: () => [String] }, nodes: { required: true, type: () => [Object] }, alias: { required: true, type: () => Object }, numberAlias: { required: true, type: () => Number } }) }, amount: { required: true, type: () => BigInt } };
+        return { name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3 }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: () => Status }, breed: { required: false, type: () => String }, nodes: { required: true, type: () => [Object] }, alias: { required: true, type: () => Object }, numberAlias: { required: true, type: () => Number, description: "NumberAlias" }, union: { required: true, type: () => Object }, intersection: { required: true, type: () => Object }, str: { required: true, type: () => [String] }, rawArray: { required: true, type: () => [({ foo: { required: true, type: () => String } })] }, nested: { required: true, type: () => ({ first: { required: true, type: () => String }, second: { required: true, type: () => Number }, status: { required: true, enum: () => Status }, tags: { required: true, type: () => [String] }, nodes: { required: true, type: () => [Object] }, alias: { required: true, type: () => Object }, numberAlias: { required: true, type: () => Number } }) }, amount: { required: true, type: () => BigInt } };
     }
 }
 _CreateCatDto2_privateProperty = new WeakMap();

test/plugin/fixtures/create-cat-exclude.dto.ts

@@ -88,7 +88,7 @@ export class CreateCatDto {
         this.status = Status.ENABLED;
     }
     static _OPENAPI_METADATA_FACTORY() {
-        return { isIn: { required: true, type: () => String, enum: ['a', 'b'] }, pattern: { required: true, type: () => String, pattern: "/^[+]?abc$/" }, name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3, minimum: 0, maximum: 10 }, positive: { required: true, type: () => Number, default: 5, minimum: 1 }, negative: { required: true, type: () => Number, default: -1, maximum: -1 }, lengthMin: { required: true, type: () => String, minLength: 2 }, lengthMinMax: { required: true, type: () => String, minLength: 3, maxLength: 5 }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: Status }, status2: { required: false, enum: Status }, statusArr: { required: false, enum: Status, isArray: true }, oneValueEnum: { required: false, enum: OneValueEnum }, oneValueEnumArr: { required: false, enum: OneValueEnum, isArray: true }, breed: { required: false, type: () => String, title: "this is breed im comment" }, nodes: { required: true, type: () => [Object] }, optionalBoolean: { required: false, type: () => Boolean }, date: { required: true, type: () => Date }, twoDimensionPrimitives: { required: true, type: () => [[String]] }, twoDimensionNodes: { required: true, type: () => [[OtherNode]] } };
+        return { isIn: { required: true, type: () => String, enum: ['a', 'b'] }, pattern: { required: true, type: () => String, pattern: "/^[+]?abc$/" }, name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3, minimum: 0, maximum: 10 }, positive: { required: true, type: () => Number, default: 5, minimum: 1 }, negative: { required: true, type: () => Number, default: -1, maximum: -1 }, lengthMin: { required: true, type: () => String, minLength: 2 }, lengthMinMax: { required: true, type: () => String, minLength: 3, maxLength: 5 }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: () => Status }, status2: { required: false, enum: () => Status }, statusArr: { required: false, enum: () => Status, isArray: true }, oneValueEnum: { required: false, enum: () => OneValueEnum }, oneValueEnumArr: { required: false, enum: () => OneValueEnum, isArray: true }, breed: { required: false, type: () => String, title: "this is breed im comment" }, nodes: { required: true, type: () => [Object] }, optionalBoolean: { required: false, type: () => Boolean }, date: { required: true, type: () => Date }, twoDimensionPrimitives: { required: true, type: () => [[String]] }, twoDimensionNodes: { required: true, type: () => [[OtherNode]] } };
     }
 }
 __decorate([
@@ -149,7 +149,7 @@ export class CreateCatDto {
         this.status = Status.ENABLED;
     }
     static _OPENAPI_METADATA_FACTORY() {
-        return { isIn: { required: true, type: () => String, enum: ['a', 'b'] }, pattern: { required: true, type: () => String, pattern: "/^[+]?abc$/" }, name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3, minimum: 0, maximum: 10 }, positive: { required: true, type: () => Number, default: 5, minimum: 1 }, negative: { required: true, type: () => Number, default: -1, maximum: -1 }, lengthMin: { required: true, type: () => String, minLength: 2 }, lengthMinMax: { required: true, type: () => String, minLength: 3, maxLength: 5 }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: Status }, status2: { required: false, enum: Status }, statusArr: { required: false, enum: Status, isArray: true }, oneValueEnum: { required: false, enum: OneValueEnum }, oneValueEnumArr: { required: false, enum: OneValueEnum, isArray: true }, breed: { required: false, type: () => String, title: "this is breed im comment" }, nodes: { required: true, type: () => [Object] }, optionalBoolean: { required: false, type: () => Boolean }, date: { required: true, type: () => Date }, twoDimensionPrimitives: { required: true, type: () => [[String]] }, twoDimensionNodes: { required: true, type: () => [[OtherNode]] }, excluded: { required: true, type: () => Number } };
+        return { isIn: { required: true, type: () => String, enum: ['a', 'b'] }, pattern: { required: true, type: () => String, pattern: "/^[+]?abc$/" }, name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3, minimum: 0, maximum: 10 }, positive: { required: true, type: () => Number, default: 5, minimum: 1 }, negative: { required: true, type: () => Number, default: -1, maximum: -1 }, lengthMin: { required: true, type: () => String, minLength: 2 }, lengthMinMax: { required: true, type: () => String, minLength: 3, maxLength: 5 }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: () => Status }, status2: { required: false, enum: () => Status }, statusArr: { required: false, enum: () => Status, isArray: true }, oneValueEnum: { required: false, enum: () => OneValueEnum }, oneValueEnumArr: { required: false, enum: () => OneValueEnum, isArray: true }, breed: { required: false, type: () => String, title: "this is breed im comment" }, nodes: { required: true, type: () => [Object] }, optionalBoolean: { required: false, type: () => Boolean }, date: { required: true, type: () => Date }, twoDimensionPrimitives: { required: true, type: () => [[String]] }, twoDimensionNodes: { required: true, type: () => [[OtherNode]] }, excluded: { required: true, type: () => Number } };
     }
 }
 __decorate([

test/plugin/fixtures/create-cat-priority.dto.ts

@@ -89,7 +89,7 @@ export class CreateCatDto {
         this.status = Status.ENABLED;
     }
     static _OPENAPI_METADATA_FACTORY() {
-        return { isIn: { required: true, type: () => String, enum: ['a', 'b'] }, pattern: { required: true, type: () => String, pattern: "/^[+]?abc$/" }, name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3, minimum: 0, maximum: 10 }, positive: { required: true, type: () => Number, default: 5, minimum: 1 }, negative: { required: true, type: () => Number, default: -1, maximum: -1 }, lengthMin: { required: true, type: () => String, minLength: 2 }, lengthMinMax: { required: true, type: () => String, minLength: 3, maxLength: 5 }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: Status }, status2: { required: false, enum: Status }, statusArr: { required: false, enum: Status, isArray: true }, oneValueEnum: { required: false, enum: OneValueEnum }, oneValueEnumArr: { required: false, enum: OneValueEnum, isArray: true }, breed: { required: false, type: () => String, title: "this is breed im comment" }, nodes: { required: true, type: () => [Object] }, optionalBoolean: { required: false, type: () => Boolean }, date: { required: true, type: () => Date }, twoDimensionPrimitives: { required: true, type: () => [[String]] }, twoDimensionNodes: { required: true, type: () => [[OtherNode]] } };
+        return { isIn: { required: true, type: () => String, enum: ['a', 'b'] }, pattern: { required: true, type: () => String, pattern: "/^[+]?abc$/" }, name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3, minimum: 0, maximum: 10 }, positive: { required: true, type: () => Number, default: 5, minimum: 1 }, negative: { required: true, type: () => Number, default: -1, maximum: -1 }, lengthMin: { required: true, type: () => String, minLength: 2 }, lengthMinMax: { required: true, type: () => String, minLength: 3, maxLength: 5 }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: () => Status }, status2: { required: false, enum: () => Status }, statusArr: { required: false, enum: () => Status, isArray: true }, oneValueEnum: { required: false, enum: () => OneValueEnum }, oneValueEnumArr: { required: false, enum: () => OneValueEnum, isArray: true }, breed: { required: false, type: () => String, title: "this is breed im comment" }, nodes: { required: true, type: () => [Object] }, optionalBoolean: { required: false, type: () => Boolean }, date: { required: true, type: () => Date }, twoDimensionPrimitives: { required: true, type: () => [[String]] }, twoDimensionNodes: { required: true, type: () => [[OtherNode]] } };
     }
 }
 __decorate([

test/plugin/fixtures/create-cat.dto.ts

@@ -126,7 +126,7 @@ export class CreateCatDto {
         _CreateCatDto_privateProperty.set(this, void 0);
     }
     static _OPENAPI_METADATA_FACTORY() {
-        return { isIn: { required: true, type: () => String, enum: ['a', 'b'] }, pattern: { required: true, type: () => String, pattern: "/^[+]?abc$/" }, name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3, minimum: 0, maximum: 10 }, positive: { required: true, type: () => Number, default: 5, minimum: 1 }, negative: { required: true, type: () => Number, default: -1, maximum: -1 }, lengthMin: { required: true, type: () => String, minLength: 2 }, lengthMinMax: { required: true, type: () => String, minLength: 3, maxLength: 5 }, names: { required: true, type: () => [String], minItems: 1, uniqueItems: true, maxItems: 10 }, employees: { required: true, type: () => [String], minItems: 1 }, nominator: { required: true, type: () => String, multipleOf: 2 }, encodedInfo: { required: true, type: () => String, format: "base64" }, creditCard: { required: true, type: () => String, format: "credit-card" }, currency: { required: true, type: () => String, format: "currency" }, email: { required: true, type: () => String, format: "email" }, response: { required: true, type: () => Object, format: "json" }, githubAccount: { required: true, type: () => String, format: "uri" }, transactionId: { required: true, type: () => String, format: "uuid" }, phoneNumber: { required: true, type: () => String, format: "mobile-phone" }, char: { required: true, type: () => String, pattern: "^[\\\\x00-\\\\x7F]+$" }, color: { required: true, type: () => String, pattern: "^#?([0-9A-F]{3}|[0-9A-F]{4}|[0-9A-F]{6}|[0-9A-F]{8})$" }, hex: { required: true, type: () => String, pattern: "^(0x|0h)?[0-9A-F]+$" }, searchBy: { required: true, type: () => String, pattern: "log_" }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: Status }, status2: { required: false, enum: Status }, statusArr: { required: false, enum: Status, isArray: true }, oneValueEnum: { required: false, enum: OneValueEnum }, oneValueEnumArr: { required: false, enum: OneValueEnum, isArray: true }, breed: { required: false, type: () => String, title: "this is breed im comment" }, nodes: { required: true, type: () => [Object] }, optionalBoolean: { required: false, type: () => Boolean }, date: { required: true, type: () => Date }, twoDimensionPrimitives: { required: true, type: () => [[String]] }, twoDimensionNodes: { required: true, type: () => [[OtherNode]] }, cryptoUUIDProperty: { required: true, type: () => String }, arrayOfUUIDs: { required: true, type: () => [String] } };
+        return { isIn: { required: true, type: () => String, enum: ['a', 'b'] }, pattern: { required: true, type: () => String, pattern: "/^[+]?abc$/" }, name: { required: true, type: () => String }, age: { required: true, type: () => Number, default: 3, minimum: 0, maximum: 10 }, positive: { required: true, type: () => Number, default: 5, minimum: 1 }, negative: { required: true, type: () => Number, default: -1, maximum: -1 }, lengthMin: { required: true, type: () => String, minLength: 2 }, lengthMinMax: { required: true, type: () => String, minLength: 3, maxLength: 5 }, names: { required: true, type: () => [String], minItems: 1, uniqueItems: true, maxItems: 10 }, employees: { required: true, type: () => [String], minItems: 1 }, nominator: { required: true, type: () => String, multipleOf: 2 }, encodedInfo: { required: true, type: () => String, format: "base64" }, creditCard: { required: true, type: () => String, format: "credit-card" }, currency: { required: true, type: () => String, format: "currency" }, email: { required: true, type: () => String, format: "email" }, response: { required: true, type: () => Object, format: "json" }, githubAccount: { required: true, type: () => String, format: "uri" }, transactionId: { required: true, type: () => String, format: "uuid" }, phoneNumber: { required: true, type: () => String, format: "mobile-phone" }, char: { required: true, type: () => String, pattern: "^[\\\\x00-\\\\x7F]+$" }, color: { required: true, type: () => String, pattern: "^#?([0-9A-F]{3}|[0-9A-F]{4}|[0-9A-F]{6}|[0-9A-F]{8})$" }, hex: { required: true, type: () => String, pattern: "^(0x|0h)?[0-9A-F]+$" }, searchBy: { required: true, type: () => String, pattern: "log_" }, tags: { required: true, type: () => [String] }, status: { required: true, default: Status.ENABLED, enum: () => Status }, status2: { required: false, enum: () => Status }, statusArr: { required: false, enum: () => Status, isArray: true }, oneValueEnum: { required: false, enum: () => OneValueEnum }, oneValueEnumArr: { required: false, enum: () => OneValueEnum, isArray: true }, breed: { required: false, type: () => String, title: "this is breed im comment" }, nodes: { required: true, type: () => [Object] }, optionalBoolean: { required: false, type: () => Boolean }, date: { required: true, type: () => Date }, twoDimensionPrimitives: { required: true, type: () => [[String]] }, twoDimensionNodes: { required: true, type: () => [[OtherNode]] }, cryptoUUIDProperty: { required: true, type: () => String }, arrayOfUUIDs: { required: true, type: () => [String] } };
     }
 }
 _CreateCatDto_privateProperty = new WeakMap();

test/plugin/fixtures/nullable.dto.ts

@@ -42,7 +42,7 @@ var Status;
 })(Status || (Status = {}));
 export class NullableDto {
     static _OPENAPI_METADATA_FACTORY() {
-        return { stringValue: { required: true, type: () => String, nullable: true }, stringArr: { required: true, type: () => [String], nullable: true }, optionalString: { required: false, type: () => String }, undefinedString: { required: true, type: () => String }, nullableEnumValue: { required: true, nullable: true, enum: OneValueEnum }, optionalEnumValue: { required: false, enum: OneValueEnum }, undefinedEnumValue: { required: true, enum: OneValueEnum }, enumValue: { required: true, nullable: true, enum: Status }, optionalNullableEnumValue: { required: false, nullable: true, enum: Status } };
+        return { stringValue: { required: true, type: () => String, nullable: true }, stringArr: { required: true, type: () => [String], nullable: true }, optionalString: { required: false, type: () => String }, undefinedString: { required: true, type: () => String }, nullableEnumValue: { required: true, nullable: true, enum: () => OneValueEnum }, optionalEnumValue: { required: false, enum: () => OneValueEnum }, undefinedEnumValue: { required: true, enum: () => OneValueEnum }, enumValue: { required: true, nullable: true, enum: () => Status }, optionalNullableEnumValue: { required: false, nullable: true, enum: () => Status } };
     }
 }
 __decorate([

test/plugin/fixtures/parameter-property.dto.ts

@@ -37,7 +37,7 @@ export class ParameterPropertyDto {
         this.protectedValue = protectedValue;
     }
     static _OPENAPI_METADATA_FACTORY() {
-        return { readonlyValue: { required: false, type: () => String }, privateValue: { required: true, type: () => String, nullable: true }, publicValue: { required: true, type: () => [${fileImport}.ItemDto] }, protectedValue: { required: true, type: () => String, default: "1234" } };
+        return { readonlyValue: { required: false, type: () => String }, privateValue: { required: true, type: () => String, nullable: true }, publicValue: { required: true, type: ${esmCompatible ? 'async ' : ''}() => [${fileImport}.ItemDto] }, protectedValue: { required: true, type: () => String, default: "1234" } };
     }
 }
 export var LettersEnum;
@@ -51,7 +51,7 @@ export class ItemDto {
         this.enumValue = enumValue;
     }
     static _OPENAPI_METADATA_FACTORY() {
-        return { enumValue: { required: true, enum: ${fileImport}.LettersEnum } };
+        return { enumValue: { required: true, enum: ${esmCompatible ? 'async ' : ''}() => ${fileImport}.LettersEnum } };
     }
 }
 `;