Gorm 想问一下，当定义指针类型的struct变量，查不到数据，是否不用将变量初始化成 empty struct

想问一下，当定义指针类型的struct变量，查不到数据，是否不用将变量初始化成 empty struct。empty struct和查不到数据是两个概念。比如定义 var s *struct Find在查不到数据的时候会返回empty struct并且不报错，这种情况应该是s == nil err == nil 如果定义var s struct Find在查不到数据的时候会返回empty struct并且不报错，这种情况应该是err == ErrRecordNotFound.

盼回复，多谢。

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Comment From: feileb

遇到同样的问题，下面的查询返回空struct并且err=nil var stat DevStat{} err := db.Where("id = ? and time < ?", id, time).Order("time DESC").Limit(1).Find(&stat).Error

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Comment From: a631807682

Only the First/Take/Last api will return ErrRecordNotFound as they obviously only return one data. You can set to return this error if you really need to.

    tx := DB.Session(&gorm.Session{})
    tx.Statement.RaiseErrorOnNotFound = true
    tx.Find()

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Comment From: udoless

同样的问题，很不方便。这是个很细节但很重要的点，也容易引起bug的一个点。

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Comment From: feileb

https://segmentfault.com/a/1190000021363996

err := db.Model(user).Where("id = ?", 1).First(&users).Error
fmt.Println(err, user)

err = db.Model(user).Where("id = ?", 1).Find(user).Error
fmt.Println(err, user)

<nil> &{0  }
record not found &{0  }

传入接收结果集的变量只能为Struct类型或Slice类型，当传入变量为Struc类型时，如果检索出来的数据为0条，会抛出ErrRecordNotFound错误，当传入变量为Slice类型时，任何条件下均不会抛出ErrRecordNotFound错误

Comment From: github-actions[bot]