Laravel，雄辩的棘手关系

Question

这是对数据库的描述==>

Users [ hasOne Student]
Students (with user_id) [not all users are students, so it's "belongsTo" User] 

Groups [hasOne subject]
Subjects (with group_id) [not all groups are subjects, i use groups for other things too, so it's "belongsTo" Group]

group_user  [simple pivot table, connecting users and groups]

我需要获得“特定学科的学生”，而无需按用户/学生进行查询，因为它对数据库的影响很大。

ps关系设置良好。

Answer 1

我认为此查询将为您提供帮助。我不知道该模型的功能，但我认为您可以理解。

$students = Subject::with(['group.users.student'])
                    ->where('subject_name','=',$subjectName)
                    ->get();