MAGETWO-48286: "Create/Edit Customer" Admin forms do not support data validation without refreshing

Author: slavvka

app/code/Magento/Cms/Controller/Adminhtml/Block/Index.php

@@ -37,6 +37,10 @@ public function execute()
         /** @var \Magento\Backend\Model\View\Result\Page $resultPage */
         $resultPage = $this->resultPageFactory->create();
         $this->initPage($resultPage)->getConfig()->getTitle()->prepend(__('Blocks'));
+
+        $dataPersistor = $this->_objectManager->get('Magento\Framework\App\Request\DataPersistorInterface');
+        $dataPersistor->clear('cms_block');
+
         return $resultPage;
     }
 }

app/code/Magento/Cms/Controller/Adminhtml/Page/Index.php

@@ -49,6 +49,9 @@ public function execute()
         $resultPage->addBreadcrumb(__('Manage Pages'), __('Manage Pages'));
         $resultPage->getConfig()->getTitle()->prepend(__('Pages'));
 
+        $dataPersistor = $this->_objectManager->get('Magento\Framework\App\Request\DataPersistorInterface');
+        $dataPersistor->clear('cms_page');
+
         return $resultPage;
     }
 }

app/code/Magento/Cms/Model/Block/DataProvider.php

@@ -74,6 +74,7 @@ public function getData()
             $block = $this->collection->getNewEmptyItem();
             $block->setData($data);
             $this->loadedData[$block->getId()] = $block->getData();
+            $this->dataPersistor->clear('cms_block');
         }
 
         return $this->loadedData;

app/code/Magento/Cms/Model/Page/DataProvider.php

@@ -72,6 +72,7 @@ public function getData()
             $page = $this->collection->getNewEmptyItem();
             $page->setData($data);
             $this->loadedData[$page->getId()] = $page->getData();
+            $this->dataPersistor->clear('cms_page');
         }
 
         return $this->loadedData;

app/code/Magento/Customer/Controller/Adminhtml/Index/Index.php

@@ -33,6 +33,7 @@ public function execute()
         $resultPage->addBreadcrumb(__('Manage Customers'), __('Manage Customers'));
 
         $this->_getSession()->unsCustomerData();
+        $this->_getSession()->unsCustomerFormData();
 
         return $resultPage;
     }

app/code/Magento/Customer/Model/Customer/DataProvider.php

@@ -160,6 +160,7 @@ public function getData()
         if (!empty($data)) {
             $customerId = isset($data['customer']['entity_id']) ? $data['customer']['entity_id'] : null;
             $this->loadedData[$customerId] = $data;
+            $this->getSession()->unsCustomerFormData();
         }
 
         return $this->loadedData;

app/code/Magento/Customer/Test/Unit/Controller/Adminhtml/Index/IndexTest.php

@@ -86,7 +86,7 @@ protected function setUp()
             ->getMock();
         $this->sessionMock = $this->getMockBuilder('Magento\Backend\Model\Session')
             ->disableOriginalConstructor()
-            ->setMethods(['unsCustomerData'])
+            ->setMethods(['unsCustomerData', 'unsCustomerFormData'])
             ->getMock();
 
         $objectManager = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
@@ -137,6 +137,8 @@ public function testExecute()
             );
         $this->sessionMock->expects($this->once())
             ->method('unsCustomerData');
+        $this->sessionMock->expects($this->once())
+            ->method('unsCustomerFormData');
 
         $this->assertInstanceOf(
             'Magento\Framework\View\Result\Page',

app/code/Magento/Customer/Test/Unit/Model/Customer/DataProviderTest.php

@@ -67,7 +67,7 @@ protected function setUp()
             ->getMock();
         $this->sessionMock = $this
             ->getMockBuilder('Magento\Framework\Session\SessionManagerInterface')
-            ->setMethods(['getCustomerFormData'])
+            ->setMethods(['getCustomerFormData', 'unsCustomerFormData'])
             ->getMockForAbstractClass();
     }
 
@@ -461,6 +461,8 @@ public function testGetDataWithCustomerFormData()
         $this->sessionMock->expects($this->once())
             ->method('getCustomerFormData')
             ->willReturn($customerFormData);
+        $this->sessionMock->expects($this->once())
+            ->method('unsCustomerFormData');
 
         $this->assertEquals([$customerId => $customerFormData], $dataProvider->getData());
     }