Illuminate\Database\QueryException: SQLSTATE[42S22]: Column not found: 1054 Unknown column答案

【问题标题】：Illuminate\Database\QueryException: SQLSTATE[42S22]: Column not found: 1054 Unknown columnIlluminate\Database\QueryException: SQLSTATE[42S22]: Column not found: 1054 Unknown column
【发布时间】：2021-04-15 15:20:04
【问题描述】：

我已尝试使用此代码返回所有学生及其在学校的信息。

$school=School::where('admin_id',auth()->user()->id)->first();
        return $user=User::with(["studentDetails"=>function($q) use($school){
            $q->where('studentDetails.school_id','=',$school->id);
        },"subscriptionsSatus.courses"])->get();

这是我的错误

Illuminate\Database\QueryException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'studentDetails.school_id' in 'where clause' (SQL: select * from `student_details` where `student_details`.`student_id` in (79, 81, 82, 83, 84, 85, 86, 87, 89, 90) and `studentDetails`.`school_id` = 7) in file

我在这里做错了什么......列名与数据库相同

【问题讨论】：

在这里删除 studentDetails $q->where('studentDetails.school_id','=',$school->id); $q->where('school_id','=',$school->id);应该没问题
@skorp 好的，它可以工作，但它会将所有用户作为 studentdetails 返回为 null。我怎样才能避免这种情况我只需要返回具有 school_id =我的价值的用户

标签： laravel eloquent

【解决方案1】：

您不必指定列：

$school=School::where('admin_id',auth()->user()->id)->first();
        
return $user=User::with(["studentDetails"=>function($q) use($school){
            $q->where('school_id','=',$school->id);
        },"subscriptionsSatus.courses"])->get();

如果您只想返回拥有这所学校的用户，那么：

$school=School::where('admin_id',auth()->user()->id)->first();
        
return $user=User::with(["studentDetails"=>function($q) use($school){
            $q->where('school_id','=',$school->id);
        },"subscriptionsSatus.courses"])
->whereHas('studentDetails', function($query){
 $query->where('school_id','=',$school->id);
})->get();

【讨论】：