Merge pull request #39 from alexhutsau/master

Use Nested options validator as priority validator

src/decorators.ts

@@ -52,7 +52,7 @@ type NestedOptions = Partial<RuleCustom> & { validator?: Class<any> };
 
 export function Nested (options: NestedOptions = {}): any {
   return (target: Class<any>, key: string): any => {
-    const t = Reflect.getMetadata("design:type", target, key) ?? options.validator;
+    const t = options.validator ?? Reflect.getMetadata("design:type", target, key);
     if (!t) {
       throw new Error(`Cannot get \"design:type\" of ${key}. Please use the validator option to @Nested`); 
     }

tests/validator.test.ts

@@ -517,6 +517,31 @@ describe("Nested", () => {
     });
   });
 
+  it("Should apply nullable nested schema", () => {
+    @Schema({ strict: true })
+    class NestedTest {
+      @Boolean()
+        prop!: boolean;
+    }
+    @Schema()
+    class Test {
+      @Nested({
+        validator: NestedTest
+      })
+        prop?: NestedTest | null;
+    }
+    expect(getSchema(Test)).toEqual({
+      $$strict: false,
+      prop: {
+        type: "object",
+        strict: true,
+        props: {
+          prop: { type: "boolean" },
+        },
+      },
+    });
+  });
+
   it("Should not remove nested $$strict", () => {
     @Schema()
     class NestedTest {
@@ -963,4 +988,4 @@ describe("Nested Array", () => {
     });
     expect(validationResult).toStrictEqual(true);
   });
-});
+});