Fixes #4739: Better display of exceptions when the response format is set as "raw" format

framework/CHANGELOG.md

@@ -32,6 +32,7 @@ Yii Framework 2 Change Log
 - Enh #4181: Added `yii\bootstrap\Modal::$headerOptions` and `yii\bootstrap\Modal::$footerOptions` (tuxoff, samdark)
 - Enh #4263: Added migration and SQL schema files for `yii\log\DbTarget` (samdark)
 - Enh #4457: Added support for using noscript for css files registered through asset bundles and Html helper (samdark)
+- Enh #4739: Better display of exceptions when the response format is set as "raw" format (qiangxue)
 - Enh #5223: Query builder now supports selecting sub-queries as columns (qiangxue)
 - Enh #5367: Added `yii\grid\DataColumn::encodeLabel` (SDKiller)
 - Enh #5587: `json_encode` is now used with `JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE` where it makes sense, also

framework/web/ErrorHandler.php

@@ -98,6 +98,8 @@ class ErrorHandler extends \yii\base\ErrorHandler
                     'exception' => $exception,
                 ]);
             }
+        } elseif ($response->format === Response::FORMAT_RAW) {
+            $response->data = $exception;
         } else {
             $response->data = $this->convertExceptionToArray($exception);
         }