Better exception JSON responses

Resolves #7406

CHANGELOG-v3.6.md

@@ -159,6 +159,7 @@
 - `craft\services\Gql::getValidationRules()` now has an `$isIntrospectionQuery` argument.
 - `Craft.formatNumber()` and other D3-based number formatting now uses a dynamically-generated locale definition based on info pulled from the application’s formatting locale. ([#7341](https://github.com/craftcms/cms/issues/7341))
 - Craft no longer reports PHP deprecation errors.
+- Exception JSON responses now include `exception`, `file`, `line`, and `trace` keys. ([#7406](https://github.com/craftcms/cms/issues/7406))
 - GraphQL queries now support eager-loading for arguments provided as input objects.
 - Made it easier to extend Craft’s Codeception testing module with custom code. ([#7339](https://github.com/craftcms/cms/issues/7339))
 - Updated Yii to 2.0.40.

CHANGELOG.md

@@ -5,6 +5,9 @@
 ### Added
 - Added `craft\test\fixtures\elements\BaseContentFixture`.
 
+### Changed
+- Exception JSON responses now include `exception`, `file`, `line`, and `trace` keys. ([#7406](https://github.com/craftcms/cms/issues/7406))
+
 ### Fixed
 - Fixed a bug where D3-formatted numbers were getting extra `.00`s added to them if the Intl extension wasn’t installed. ([#7402](https://github.com/craftcms/cms/issues/7402))
 

src/web/Controller.php

@@ -209,7 +209,23 @@ public function runAction($id, $params = [])
                 } else {
                     $statusCode = 500;
                 }
-                return $this->asErrorJson($message)
+
+                if (YII_DEBUG) {
+                    $response = $this->asJson([
+                        'error' => $message,
+                        'exception' => get_class($e),
+                        'file' => $e->getFile(),
+                        'line' => $e->getLine(),
+                        'trace' => array_map(function($step) {
+                            unset($step['args']);
+                            return $step;
+                        }, $e->getTrace()),
+                    ]);
+                } else {
+                    $response = $this->asErrorJson($message);
+                }
+
+                return $response
                     ->setStatusCode($statusCode);
             }
             throw $e;