Avoid exception in constraint for value which is not a string

libs/common/src/lib/validator-constraints/is-not-in-the-future.spec.ts

@@ -26,4 +26,10 @@ describe('IsNotInTheFutureConstraint', () => {
   it('Refuses a date in the future', () => {
     expect(constraint.validate('2026-09-05')).toBe(false);
   });
+
+  it('Leaves a value which is not a string to IsISO8601', () => {
+    expect(constraint.validate(undefined)).toBe(true);
+    expect(constraint.validate(null)).toBe(true);
+    expect(constraint.validate(123)).toBe(true);
+  });
 });

libs/common/src/lib/validator-constraints/is-not-in-the-future.ts

@@ -15,7 +15,12 @@ export class IsNotInTheFutureConstraint implements ValidatorConstraintInterface
     return '$property must not be a date in the future';
   }
 
-  public validate(aDate: string) {
+  public validate(aDate: unknown) {
+    // IsISO8601 refuses a value which is not a string
+    if (typeof aDate !== 'string') {
+      return true;
+    }
+
     return !isAccountBalanceInFuture({ date: resetHours(parseISO(aDate)) });
   }
 }