修改

app/Http/Controllers/admin/ActivityReward.php

@@ -51,9 +51,12 @@ class ActivityReward extends Controller
                 'end_time' => ['required', 'date', 'date_format:Y-m-d', 'after_or_equal:start_time'],
                 'detail_image' => ['required', 'url', 'regex:/\.(jpeg|jpg|png|webp)$/i'],
                 'status' => ['required', 'integer', 'min:0', 'max:1'],
-                'type' => ['required', 'string'],
+                'type' => ['required'],
                 'lang' => ['required', 'string'],
+                'content' => ['nullable', 'string'],
+                'params' => ['nullable', 'array'],
             ]);
+            $params['params'] = json_encode($params['params']);
             ActivityRewardService::submit($params);
             DB::commit();
         } catch (ValidationException $e) {