update

app/Http/Controllers/Mobile/SupplyDemandController.php

@@ -245,6 +245,10 @@ class SupplyDemandController extends CommonController
             $query->where('user_id', $all['to_user_id'])->where('to_user_id', $this->getUserId());
         })->first();
         if (empty($dialogue)) {
+            // 不能给自己发信息
+            if ($all['to_user_id'] == $this->getUserId()) {
+                return $this->error('不能给自己发信息');
+            }
             // 创建一条会话
             $dialogue = Dialogue::create([
                 'user_id' => $this->getUserId(),