fix(mapping): Fixed an issue that would cause @Mapper() to break on Date properties

Author: spuxx-dev

packages/nest-utils/src/mapping/services/mapper.test.ts

@@ -24,6 +24,9 @@ describe('Mapper', () => {
         @Map()
         bool: boolean = false;
 
+        @Map()
+        date: Date = new Date('2024-10-29T00:00:00');
+
         @Map()
         opt: string | undefined = undefined;
       }
@@ -35,12 +38,15 @@ describe('Mapper', () => {
         @Map()
         num: number;
 
+        @Map()
+        date: Date;
+
         @Map()
         bool: boolean;
       }
 
       const target = mapper.map(new Source(), Source, Target);
-      expect(target).toEqual({ str: '', num: 0, bool: false });
+      expect(target).toEqual({ str: '', num: 0, bool: false, date: new Date('2024-10-29T00:00:00') });
     });
 
     it("should not map if the source property isn't decorated", () => {

packages/nest-utils/src/mapping/services/mapper.ts

@@ -83,7 +83,12 @@ export class Mapper {
 
     let value: any;
     const sourceType = this.getType(source, propertyKey);
-    const isNestedProp = sourceType.prototype.toString().includes('object');
+    let isNestedProp = false;
+    try {
+      isNestedProp = sourceType.prototype.toString().includes('object');
+    } catch (error) {
+      // Do nothing, isNestedProp will remain false
+    }
     if (isNestedProp && this.getValue(source, propertyKey)) {
       // In case the property is a nested property, map it recursively
       const targetType = this.getType(target, sourceMetadata.targetKey);