动态删除 删除对应的引用topic 关系

application/api/model/UserZone.php

@@ -548,6 +548,12 @@ class UserZone extends Model
         $data['is_delete'] = 2;
         $data['delete_time'] = time();
         $reslut = db::name('user_zone')->where('id', $zid)->update($data);
+        $top_zone = db::name('user_zone_topic')->where('zone_id',$zid)->select();
+        if($top_zone){
+            foreach ($top_zone as $v){
+                db::name('user_zone_topic')->where('id',$v['id'])->delete();
+            }
+        }
         if ($reslut) {
             return ['code' => 1, 'msg' => '删除成功', 'data' => null];
         } else {