fix: Fix applyLazyDecorator return when metadataList is empty (#30)

* fix: Fix applyLazyDecorator return when metadataList is empty

* fix: Fix Reflection fail caused by invalid target method

* chore: rename methodNames to propertyKeys at applyLazyDecorator

* Update src/auto-aspect-executor.ts

---------

Co-authored-by: 장지훈 <[email protected]>

Author: smilecc

src/auto-aspect-executor.ts

@@ -47,25 +47,32 @@ export class AutoAspectExecutor implements OnModuleInit {
       : instanceWrapper.metatype.prototype;
 
     // Use scanFromPrototype for support nestjs 8
-    const methodNames = this.metadataScanner.scanFromPrototype(
+    const propertyKeys = this.metadataScanner.scanFromPrototype(
       target,
       instanceWrapper.isDependencyTreeStatic() ? Object.getPrototypeOf(target) : target,
       (name) => name,
     );
 
     const metadataKey = this.reflector.get(ASPECT, lazyDecorator.constructor);
     // instance에 method names 를 순회하면서 lazyDecorator.wrap을 적용함
-    for (const methodName of methodNames) {
+    for (const propertyKey of propertyKeys) {
+      // the target method is must be object or function
+      // @see: https://github.com/rbuckton/reflect-metadata/blob/9562d6395cc3901eaafaf8a6ed8bc327111853d5/Reflect.ts#L938
+      const targetProperty = target[propertyKey];
+      if (!targetProperty || (typeof targetProperty !== "object" && typeof targetProperty !== "function")) {
+        continue;
+      }
+
       const metadataList: AopMetadata[] = this.reflector.get<AopMetadata[]>(
         metadataKey,
-        target[methodName],
+        targetProperty,
       );
       if (!metadataList) {
-        return;
+        continue;
       }
 
       for (const aopMetadata of metadataList) {
-        this.wrapMethod({ lazyDecorator, aopMetadata, methodName, target });
+        this.wrapMethod({ lazyDecorator, aopMetadata, methodName: propertyKey, target });
       }
     }
   }