#278 allow name '0'

Author: Eugene Tupikov

src/components/BaseColumn.php

@@ -201,7 +201,7 @@ public function init()
             $this->name = self::DEFAULT_STATIC_COLUMN_NAME;
         }
 
-        if (empty($this->name)) {
+        if ($this->isNameEmpty()) {
             throw new InvalidConfigException("The 'name' option is required.");
         }
 
@@ -210,6 +210,19 @@ public function init()
         }
     }
 
+    private function isNameEmpty()
+    {
+        if (empty($this->name)) {
+            if ($this->name === 0 || $this->name === '0') {
+                return false;
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
     /**
      * @return bool whether the type of column is hidden input.
      */