NEW Show more information in ValidationException message

src/Core/Validation/ConstraintValidator.php

@@ -15,10 +15,9 @@
 class ConstraintValidator
 {
     /**
-     * Validate a value by a constraint
+     * Validate a value by a constraint or an array of constraints
      *
      * @param Constraint|Constraint[] $constraints a constraint or array of constraints to validate against
-     * @param string $fieldName The field name the value relates to, if relevant
      */
     public static function validate(mixed $value, Constraint|array $constraints, string $fieldName = ''): ValidationResult
     {

src/Core/Validation/ValidationException.php

@@ -5,6 +5,11 @@
 use Exception;
 use InvalidArgumentException;
 use SilverStripe\Core\Injector\Injectable;
+use SilverStripe\Control\Director;
+use SilverStripe\Dev\DevelopmentAdmin;
+use SilverStripe\ORM\DataObject;
+use SilverStripe\Control\Controller;
+use SilverStripe\Core\Config\Configurable;
 
 /**
  * Exception thrown by {@link DataObject}::write if validation fails. By throwing an
@@ -14,6 +19,15 @@
 class ValidationException extends Exception
 {
     use Injectable;
+    use Configurable;
+
+    /**
+     * List of controllers to show additioanl info when not in CLI
+     * Subclasses of these controllers will also show additional info
+     */
+    private static array $show_additional_info_non_cli_controllers = [
+        DevelopmentAdmin::class
+    ];
 
     /**
      * The contained ValidationResult related to this error
@@ -48,6 +62,16 @@ public function __construct($result = null, $code = 0)
             // Pick first message
             foreach ($result->getMessages() as $message) {
                 $exceptionMessage = $message['message'];
+                if ($this->doShowAdditionalInfo()) {
+                    if ($message['fieldName']) {
+                        $exceptionMessage .= ' - fieldName: ' . $message['fieldName'];
+                    }
+                    $dataClass = $result->getModelClass();
+                    if (is_subclass_of($dataClass, DataObject::class, true)) {
+                        $exceptionMessage .= ', recordID: ' . $result->getRecordID();
+                        $exceptionMessage .= ', dataClass: ' . $dataClass;
+                    }
+                }
                 break;
             }
         } elseif (is_string($result)) {
@@ -71,4 +95,24 @@ public function getResult()
     {
         return $this->result;
     }
+
+    /**
+     * Whether to show additional information in the error message depending on the context
+     *
+     * We do not want this to show this in a context where it's easy to know the record and value that
+     * triggered the error e.g. form submission, API calls, etc
+     */
+    private function doShowAdditionalInfo(): bool
+    {
+        if (Director::is_cli()) {
+            return true;
+        }
+        $currentController = Controller::curr();
+        foreach ($this->config()->get('show_additional_info_non_cli_controllers') as $controller) {
+            if (is_a($currentController, $controller)) {
+                return true;
+            }
+        }
+        return false;
+    }
 }