dongzheng7165 2016-12-17 23:03
浏览 126
已采纳

Laravel Eloquent whereIn,从数据库中检索记录,包括缺少日期

I am new to Laravel.

I am building app that counts your daily steps.
And I am building API, so I need to return 0 steps when there are no results in DB for selected days in array.

But if there is data for some of the days to return actual steps and to return 0 for other days. I have tried this:

$steps = Step::whereIn('date', $dates)
             ->where('user_id', Auth::id())
             ->get();

But it returns only matches. As I wrote I want to return data for all days, not only for days in DB. Please, help :)

  • 写回答

3条回答 默认 最新

  • dqwyghl0649 2016-12-17 23:27
    关注

    This will never be possible with a simple Query as the DB can not give you anything, it does not know about. You can solve this either progrmmatically bei iterating over the result and adding all missing dates with 0-value or by adding a table to your DB which contains all dates and then left join your steps table with it in the query.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(2条)

报告相同问题?

悬赏问题

  • ¥20 ML307A在使用AT命令连接EMQX平台的MQTT时被拒绝
  • ¥20 腾讯企业邮箱邮件可以恢复么
  • ¥15 有人知道怎么将自己的迁移策略布到edgecloudsim上使用吗?
  • ¥15 错误 LNK2001 无法解析的外部符号
  • ¥50 安装pyaudiokits失败
  • ¥15 计组这些题应该咋做呀
  • ¥60 更换迈创SOL6M4AE卡的时候,驱动要重新装才能使用,怎么解决?
  • ¥15 让node服务器有自动加载文件的功能
  • ¥15 jmeter脚本回放有的是对的有的是错的
  • ¥15 r语言蛋白组学相关问题