#49 fix requirement attributes at DataTableColumn

Author: ZAYEC77

src/DataTable.php

@@ -13,7 +13,6 @@
 use yii\helpers\Html;
 use yii\helpers\Inflector;
 use yii\helpers\Json;
-use yii\web\JsExpression;
 
 /**
  * Class DataTable
@@ -149,16 +148,18 @@ private function initData()
                 $row = [];
                 foreach ($this->_options['columns'] as $column) {
                     if ($column instanceof DataTableColumn) {
-                        $value = ArrayHelper::getValue($obj, $column->data);
-                        if (($pos = strrpos($column->data, '.')) !== false) {
-                            $keys = explode('.', $column->data);
-                            $a = $value;
-                            foreach (array_reverse($keys) as $key) {
-                                $a = [$key => $a];
+                        if ($column->data) {
+                            $value = ArrayHelper::getValue($obj, $column->data);
+                            if (($pos = strrpos($column->data, '.')) !== false) {
+                                $keys = explode('.', $column->data);
+                                $a = $value;
+                                foreach (array_reverse($keys) as $key) {
+                                    $a = [$key => $a];
+                                }
+                                $row[$keys[0]] = $a[$keys[0]];
+                            } else {
+                                $row[$column->data] = $value;
                             }
-                            $row[$keys[0]] = $a[$keys[0]];
-                        } else {
-                            $row[$column->data] = $value;
                         }
                     }
                 }

src/DataTableColumn.php

@@ -7,6 +7,7 @@
 
 namespace nullref\datatable;
 
+use yii\base\InvalidConfigException;
 use yii\base\Widget;
 use yii\helpers\Html;
 use yii\helpers\Inflector;
@@ -64,8 +65,8 @@ public function init()
     {
         parent::init();
 
-        if ($this->data === null) {
-            throw new InvalidConfigException(get_class($this) . '::$data must be set.');
+        if ($this->data === null && $this->render === null) {
+            throw new InvalidConfigException("Either 'data' or 'render' properties must be specified.");
         }
 
         if ($this->title === null) {