[英]Django - Database design
到目前為止,我有以下數據庫:
Person model
Student model inherits from Person, no added functionality
Lecturer model same as Student
Course model
leader = ForeignKey to Lecturer (1 Lecturer can have many courses)
students = ManytoMany with Student (Many students can take many courses)
Card model
student = OneToOne with student (1 card per 1 student).
Event model
course = ForeignKey to Course (One course can have many events)
現在我的問題是; 我想根據以下標准標記參加活動的學生。 在創建事件時,標記的學生需要為空。 稍后我將創建一個將注冊卡 ID 的視圖。 Card 模型與學生是 1-1 的關系。 學生是多對多課程。 課程是 FK 到 Event。
我該怎么做?
如果是我,我可能會使用專用的出勤表(類似於以下內容):
class Attendance(Model):
student = models.ForeignKey('Student')
event = models.ForeignKey('Event')
present = models.BooleanField(default=True)
您可以將學生字段換成卡片,如果這是您想要的(但因為它是一對一的,所以並不重要)。 也可以交換present
字段的默認值,具體取決於您希望如何處理此表中的條目。
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