MAGETWO-37934: Cannot create customer from admin

- Move retrieving $dataScope to uiComponent implementation

Author: guz-anton

app/code/Magento/Ui/Component/AbstractComponent.php

@@ -232,4 +232,12 @@ public function prepareDataSource(array & $dataSource)
     {
         //
     }
+
+    /**
+     * @return array
+     */
+    public function getDataSourceData()
+    {
+        return [];
+    }
 }

app/code/Magento/Ui/Component/Form.php

@@ -23,4 +23,24 @@ public function getComponentName()
     {
         return static::NAME;
     }
+
+    /**
+     * @inheritdoc
+     */
+    public function getDataSourceData()
+    {
+        $dataSource = [];
+        $id = $this->getContext()->getRequestParam($this->getContext()->getDataProvider()->getRequestFieldName());
+        if ($id) { // case form
+            $this->getContext()->getDataProvider()
+                ->addFilter($this->getContext()->getDataProvider()->getPrimaryFieldName(), $id);
+        }
+        $data = $this->getContext()->getDataProvider()->getData();
+        if (isset($data[$id])) {
+            $dataSource = [
+                'data' => $data[$id]
+            ];
+        }
+        return $dataSource;
+    }
 }

app/code/Magento/Ui/Component/Listing.php

@@ -30,4 +30,15 @@ public function getComponentName()
     {
         return static::NAME;
     }
+
+    /**
+     * @inheritdoc
+     */
+    public function getDataSourceData()
+    {
+        return [
+            'data' => $this->getContext()->getDataProvider()->getData(),
+            'totalCount' => $this->getContext()->getDataProvider()->count()
+        ];
+    }
 }

lib/internal/Magento/Framework/View/Element/UiComponent/Context.php

@@ -206,25 +206,8 @@ public function getDataProvider()
      */
     public function getDataSourceData(UiComponentInterface $component)
     {
-        $dataSource = [];
-        $id = $this->getRequestParam($this->getDataProvider()->getRequestFieldName());
-        if ($id) { // case form
-            $this->getDataProvider()->addFilter($this->getDataProvider()->getPrimaryFieldName(), $id);
-            $data = $this->getDataProvider()->getData();
-            if (isset($data[$id])) {
-                $dataSource = [
-                    'data' => $data[$id]
-                ];
-            }
-        } else { // case listing
-            $dataSource = [
-                'data' => $this->getDataProvider()->getData(),
-                'totalCount' => $this->getDataProvider()->count()
-            ];
-        }
-
+        $dataSource = $component->getDataSourceData();
         $this->prepareDataSource($dataSource, $component);
-
         $dataProviderConfig = $this->getDataProvider()->getConfigData();
         return [
             $this->getDataProvider()->getName() => [

lib/internal/Magento/Framework/View/Element/UiComponentInterface.php

@@ -116,4 +116,9 @@ public function prepare();
      * @return void
      */
     public function prepareDataSource(array & $dataSource);
+
+    /**
+     * @return array
+     */
+    public function getDataSourceData();
 }