Version 1

[yaffs-website] / web / core / lib / Drupal / Core / Validation / Plugin / Validation / Constraint / UniqueFieldConstraint.php

diff --git a/web/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldConstraint.php b/web/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldConstraint.php
new file mode 100644 (file)
index 0000000..ed40bdc
--- /dev/null
+++ b/web/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/UniqueFieldConstraint.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace Drupal\Core\Validation\Plugin\Validation\Constraint;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * Checks if an entity field has a unique value.
+ *
+ * @Constraint(
+ *   id = "UniqueField",
+ *   label = @Translation("Unique field constraint", context = "Validation"),
+ * )
+ */
+class UniqueFieldConstraint extends Constraint {
+
+  public $message = 'A @entity_type with @field_name %value already exists.';
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validatedBy() {
+    return '\Drupal\Core\Validation\Plugin\Validation\Constraint\UniqueFieldValueValidator';
+  }
+
+}