Question

我是Django的新手，并试图建立一个教师与学生关系的模型。教师和学生都可以访问任何特定课程的课程材料。教师将在课程中有许多学生，每个学生将有许多教师（取决于他们正在参加多少课程）。我现在有这个设置：我是否在正确的轨道上？

class CourseWare(models.Model):
    #information goes here?
    instructor = models.ForeignKey(Instructor)
    TrainingManager = models.ForeignKey(TrainingManager)

class Instructor(models.Model):
    firstName = models.CharField(max_length=30, blank=True, null=True)
    lastName = models.CharField(max_length=30, blank=True, null=True)
    material = models.ForeignKey(courseWare) #instructor deals with one course
    def __unicode__(self):
        return u's_' + self.firstName + u' ' + self.lastName

class Student(models.Model):
    firstName = models.CharField(max_length=30, blank=True, null=True)
    lastName = models.CharField(max_length=30, blank=True,null=True)
    instructors = models.ManyToManyField(Instructor) #Many Instructors <-> Many Students?
    material = models.ForeignKey(CourseWare)
    terminationDate = models.DateField()

Answer 1

由于你的教师只能教一门课程，我会做这样的事情：

class Course(models.Model):
    instructor = models.OneToOneField(Instructor, related_name='course')
    training_manager = models.ForeignKey(TrainingManager)

    students = models.ManyToManyField(Course, related_name='courses')

class Instructor(models.Model):
    first_name = models.CharField(max_length=30, blank=True, null=True)
    last_name = models.CharField(max_length=30, blank=True, null=True)

class Student(models.Model):
    first_name = models.CharField(max_length=30, blank=True, null=True)
    last_name = models.CharField(max_length=30, blank=True, null=True)

    termination_date = models.DateField()

related_name关键字参数允许您反向查询。例如，some_student.courses.all()。

Django - 老师学生的建议？

1 个答案: