TYPO3.Flow

If I validate several objects one after the other and then call getErrors() the listed errors will be the set union of all errors in the different single validation processes.

This does not agree with the comments found in

Classes/Validation/Validator/ValidatorInterface.php

which state

[...]
        /**
         * Checks if the given value is valid according to the validator.
         *
         * If at least one error occurred, the result is FALSE and any errors can
         * be retrieved through the getErrors() method.
         *
         * Note that all implementations of this method should set $this->errors() to an
         * empty array before validating.
         *
         * @param mixed $value The value that should be validated
         * @return boolean TRUE if the value is valid, FALSE if an error occured
         * @api
         */
        public function isValid($value);
[...]
        /**
         * Returns an array of errors which occurred during the last isValid() call.
         *
         * @return array An array of \F3\FLOW3\Validation\Error objects or an empty array if no errors occurred.
         * @api
         */
        public function getErrors();
[...]

A piece of code like

$validator = $this->validatorResolver->getBaseValidatorConjunction('F3\Foo\Domain\Model\Bar');
if ($validator->isValid($fooBarObject)) {
} else {
 $errorMessages = '';
 foreach ($validator->getErrors() as $error) {
  $errorMessages .= $error->getPropertyName().', ';
 }
}

will not give the errors for the last instance of $fooBarObject that was validated but instead the set union of errors from all instances validated up to this point. In other words, if in the first instance the property "abc" id not validate and in the second instance the property "bla" didn't validate, the error lists will be

instance 1: abc,
instance 2: abc,bla,

instead of

instance 1: abc,
instance 2: bla,