Issue #2181549 by tstoeckler, andypost: Provide a StringLong field item with...

Issue #2181549 by tstoeckler, andypost: Provide a StringLong field item with schema type 'text' without a 'format' column.

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringLongItem.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Field\Plugin\Field\FieldType\StringLongItem.
+ */
+
+namespace Drupal\Core\Field\Plugin\Field\FieldType;
+
+use Drupal\Core\Field\FieldDefinitionInterface;
+
+/**
+ * Defines the 'string_long' field type.
+ *
+ * @FieldType(
+ *   id = "string_long",
+ *   label = @Translation("Long string"),
+ *   description = @Translation("An entity field containing a long string value."),
+ *   configurable = FALSE
+ * )
+ */
+class StringLongItem extends StringItem {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldDefinitionInterface $field_definition) {
+    return array(
+      'columns' => array(
+        'value' => array(
+          'type' => 'text',
+          'size' => 'big',
+          'not null' => TRUE,
+          'default' => '',
+        ),
+      ),
+    );
+  }
+
+}

core/modules/aggregator/lib/Drupal/aggregator/Entity/Feed.php

@@ -160,7 +160,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setLabel(t('Link'))
       ->setDescription(t('The link of the feed.'));
 
-    $fields['description'] = FieldDefinition::create('string')
+    $fields['description'] = FieldDefinition::create('string_long')
       ->setLabel(t('Description'))
       ->setDescription(t("The parent website's description that comes from the !description element in the feed.", array('!description' => '<description>')));