refactor: 处理文章发布时间为空情况

app/admin/model/v1/ArticleModel.php

@@ -16,6 +16,12 @@ class ArticleModel extends ArticleBaseModel
     // 软删除标记数据字段
     protected $deleteTime = 'deleted_at';
 
+    // 写入前，处理发布时间为空情况
+    public static function onBeforeWrite(ArticleModel $article)
+    {
+        $article->release_time = empty($article->release_time) ? null : $article->release_time;
+    }
+
     // 关联分类
     public function category()
     {