Skip undefined properties

src/validation/ValidationExecutor.ts

@@ -94,9 +94,13 @@ export class ValidationExecutor {
                 return;
             }
 
-            // handle IS_DEFINED validation type the special way - it should work no matter skipMissingProperties is set or not
+            // handle IS_DEFINED validation type the special way - it should work no matter skipUndefinedProperties/skipMissingProperties is set or not
             this.defaultValidations(object, value, definedMetadatas, validationError.constraints);
 
+            if (value === undefined && this.validatorOptions && this.validatorOptions.skipUndefinedProperties === true) {
+                return;
+            }
+
             if ((value === null || value === undefined) && this.validatorOptions && this.validatorOptions.skipMissingProperties === true) {
                 return;
             }

src/validation/ValidatorOptions.ts

@@ -4,7 +4,12 @@
 export interface ValidatorOptions {
 
     /**
-     * If set to true than validator will skip validation of all properties that are missing in the validating object.
+     * If set to true then validator will skip validation of all properties that are undefined in the validating object.
+     */
+    skipUndefinedProperties?: boolean;
+
+    /**
+     * If set to true then validator will skip validation of all properties that are null or undefined in the validating object.
      */
     skipMissingProperties?: boolean;
 

test/functional/validation-functions-and-decorators.spec.ts

@@ -153,6 +153,14 @@ describe("IsDefined", function() {
         checkInvalidValues(new MyClass(), invalidValues, done);
     });
 
+    it("should not fail if validator.validate said that its valid with skipUndefinedProperties set to true", function(done) {
+        checkValidValues(new MyClass(), validValues, done, { skipUndefinedProperties: true });
+    });
+
+    it("should fail if validator.validate said that its invalid with skipUndefinedProperties set to true", function(done) {
+        checkInvalidValues(new MyClass(), invalidValues, done, { skipUndefinedProperties: true });
+    });
+
     it("should not fail if validator.validate said that its valid with skipMissingProperties set to true", function(done) {
         checkValidValues(new MyClass(), validValues, done, { skipMissingProperties: true });
     });