Laravel，雄辯的棘手關系

Question

這是對數據庫的描述==>

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]

我需要獲得“特定學科的學生”，而無需按用戶/學生進行查詢，因為它對數據庫的影響很大。

ps關系設置良好。

Answer 1

我認為此查詢將為您提供幫助。我不知道該模型的功能，但我認為您可以理解。

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