diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
index 2ea450d..d4945cf 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
@@ -1257,7 +1257,11 @@ protected function saveToDedicatedTables(ContentEntityInterface $entity, $update
           foreach ($storage_definition->getColumns() as $column => $attributes) {
             $column_name = $table_mapping->getFieldColumnName($storage_definition, $column);
             // Serialize the value if specified in the column schema.
-            $record[$column_name] = !empty($attributes['serialize']) ? serialize($item->$column) : $item->$column;
+            $value = $item->$column;
+            if (!empty($attributes['serialize'])) {
+              $value = serialize($value);
+            }
+            $record[$column_name] = drupal_schema_get_field_value($attributes, $value);
           }
           $query->values($record);
           if ($this->entityType->isRevisionable()) {
diff --git a/core/modules/field/src/Tests/Boolean/BooleanFieldTest.php b/core/modules/field/src/Tests/Boolean/BooleanFieldTest.php
index 30f67d1..5fa491b 100644
--- a/core/modules/field/src/Tests/Boolean/BooleanFieldTest.php
+++ b/core/modules/field/src/Tests/Boolean/BooleanFieldTest.php
@@ -20,7 +20,12 @@ class BooleanFieldTest extends WebTestBase {
    *
    * @var array
    */
-  public static $modules = array('entity_test', 'field_ui', 'options');
+  public static $modules = [
+    'entity_test',
+    'field_ui',
+    'options',
+    'field_test_boolean_access_denied',
+  ];
 
   /**
    * A field to use in this test class.
@@ -179,4 +184,66 @@ function testBooleanField() {
     $this->assertFieldById('edit-settings-off-label', $off);
   }
 
+  /**
+   * Test field access.
+   */
+  public function testFormAccess() {
+    $on = 'boolean_on';
+    $off = 'boolean_off';
+    $label = 'boolean_label';
+    $field_name = 'boolean_name';
+    $this->fieldStorage = FieldStorageConfig::create([
+      'field_name' => $field_name,
+      'entity_type' => 'entity_test',
+      'type' => 'boolean',
+    ]);
+    $this->fieldStorage->save();
+    $this->field = FieldConfig::create([
+      'field_name' => $field_name,
+      'entity_type' => 'entity_test',
+      'bundle' => 'entity_test',
+      'label' => $label,
+      'settings' => [
+        'on_label' => $on,
+        'off_label' => $off,
+      ],
+    ]);
+    $this->field->save();
+
+    // Create a form display for the default form mode.
+    entity_get_form_display('entity_test', 'entity_test', 'default')
+      ->setComponent($field_name, [
+        'type' => 'boolean_checkbox',
+      ])
+      ->save();
+
+    // Create a display for the full view mode.
+    entity_get_display('entity_test', 'entity_test', 'full')
+      ->setComponent($field_name, [
+        'type' => 'boolean',
+      ])
+      ->save();
+
+    // Display creation form.
+    $this->drupalGet('entity_test/add');
+    $this->assertFieldByName("{$field_name}[value]");
+
+    // Should be posted OK.
+    $this->drupalPostForm(NULL, [], t('Save'));
+    preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
+    $id = $match[1];
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
+
+    // Tell the test module to disable access to the field.
+    \Drupal::state()->set('field.test_boolean_field_access_field', $field_name);
+    $this->drupalGet('entity_test/add');
+    // Field should not be there anymore.
+    $this->assertNoFieldByName("{$field_name}[value]");
+    // Should still be able to post the form.
+    $this->drupalPostForm(NULL, [], t('Save'));
+    preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
+    $id = $match[1];
+    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
+  }
+
 }
diff --git a/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldType/TestObjectItem.php b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldType/TestObjectItem.php
new file mode 100644
index 0000000..4a8aad6
--- /dev/null
+++ b/core/modules/field/tests/modules/field_test/src/Plugin/Field/FieldType/TestObjectItem.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace Drupal\field_test\Plugin\Field\FieldType;
+
+use Drupal\Core\Field\FieldStorageDefinitionInterface;
+use Drupal\Core\TypedData\DataDefinition;
+use Drupal\Core\Field\FieldItemBase;
+
+/**
+ * Defines the 'test_object_field' entity field item.
+ *
+ * @FieldType(
+ *   id = "test_object_field",
+ *   label = @Translation("Test object field"),
+ *   description = @Translation("Dummy object field type used for tests."),
+ *   default_widget = "test_object_field_widget",
+ *   default_formatter = "object_field_test_default"
+ * )
+ */
+class TestObjectItem extends FieldItemBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function propertyDefinitions(FieldStorageDefinitionInterface $field_definition) {
+    $properties['value'] = DataDefinition::create('any')
+      ->setLabel(t('Value'))
+      ->setRequired(TRUE);
+
+    return $properties;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function schema(FieldStorageDefinitionInterface $field_definition) {
+    return [
+      'columns' => [
+        'value' => [
+          'description' => 'The object item value.',
+          'type' => 'blob',
+          'not null' => TRUE,
+          'serialize' => TRUE,
+        ],
+      ],
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setValue($values, $notify = TRUE) {
+    if (isset($values['value'])) {
+      // @todo Remove this in https://www.drupal.org/node/2788637.
+      if (is_string($values['value'])) {
+        $values['value'] = unserialize($values['value']);
+      }
+    }
+    parent::setValue($values, $notify);
+  }
+}
diff --git a/core/modules/field/tests/modules/field_test_boolean_access_denied/field_test_boolean_access_denied.info.yml b/core/modules/field/tests/modules/field_test_boolean_access_denied/field_test_boolean_access_denied.info.yml
new file mode 100644
index 0000000..d1b578f
--- /dev/null
+++ b/core/modules/field/tests/modules/field_test_boolean_access_denied/field_test_boolean_access_denied.info.yml
@@ -0,0 +1,8 @@
+name: 'Boolean field Test'
+type: module
+description: 'Support module for the field and entity display tests.'
+core: 8.x
+package: Testing
+version: VERSION
+dependencies:
+  - field
diff --git a/core/modules/field/tests/modules/field_test_boolean_access_denied/field_test_boolean_access_denied.module b/core/modules/field/tests/modules/field_test_boolean_access_denied/field_test_boolean_access_denied.module
new file mode 100644
index 0000000..9628d43
--- /dev/null
+++ b/core/modules/field/tests/modules/field_test_boolean_access_denied/field_test_boolean_access_denied.module
@@ -0,0 +1,10 @@
+<?php
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Field\FieldDefinitionInterface;
+
+/**
+ * Implements hook_entity_field_access().
+ */
+function field_test_boolean_access_denied_entity_field_access($operation, FieldDefinitionInterface $field_definition, \Drupal\Core\Session\AccountInterface $account, \Drupal\Core\Field\FieldItemListInterface $items = NULL) {
+  return AccessResult::forbiddenIf($field_definition->getName() === \Drupal::state()->get('field.test_boolean_field_access_field'));
+}
diff --git a/core/modules/field/tests/src/Kernel/TestObjectItemTest.php b/core/modules/field/tests/src/Kernel/TestObjectItemTest.php
new file mode 100644
index 0000000..f73613e
--- /dev/null
+++ b/core/modules/field/tests/src/Kernel/TestObjectItemTest.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace Drupal\Tests\field\Kernel;
+
+use Drupal\entity_test\Entity\EntityTest;
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+
+/**
+ * Tests the serialization of an object.
+ *
+ * @group field
+ */
+class TestObjectItemTest extends FieldKernelTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('field_test');
+
+  protected function setUp() {
+    parent::setUp();
+
+    // Create a 'test_field' field and storage for validation.
+    FieldStorageConfig::create(array(
+      'field_name' => 'field_test',
+      'entity_type' => 'entity_test',
+      'type' => 'test_object_field',
+    ))->save();
+    FieldConfig::create([
+      'entity_type' => 'entity_test',
+      'field_name' => 'field_test',
+      'bundle' => 'entity_test',
+    ])->save();
+  }
+
+  public function testTestObjectItem() {
+    $object = new \stdClass();
+    $object->foo = 'bar';
+    $entity = EntityTest::create();
+    $entity->field_test->value = $object;
+    $entity->save();
+
+    // Verify that the entity has been created properly.
+    $id = $entity->id();
+    $entity = EntityTest::load($id);
+    $this->assertTrue($entity->field_test->value instanceof \stdClass);
+    $this->assertEquals($object, $entity->field_test->value);
+  }
+}