如何在 Django 中自动为教师选择学生

Question

这是我的学生课

class Students(AbstractUser):
    mobile_number = models.TextField()

我的老师课堂

class Teacher(models.Model):
    students = models.TextField()

如何在 Django 中自动将 6 个学生关联到一个老师

Answer 1

您需要更改模型。 如果每个学生只能有一位老师，那么您需要以这种方式更改学生模型：

class Student(AbstractUser): 
    mobile_number = models.TextField()
    teacher = models.ForeignKey("Teacher", on_delete=models.SET_NULL, null=True)

然后您可以像这样将老师分配给学生 teacher = Teacher.objects.get(pk=...) #get required teacher 要将这位老师分配给几个学生，您可以 Student.objects.filter(pk__in=[id_student1, id_student2, ...]).update(teacher=teacher)

如果您想分配任意数量的学生，那么在您“聘请”您需要做的老师的地方，找到所需数量的没有老师的学生，然后为他们分配老师。你可以这样做：

for student in Students.filter(teacher__isnull=True)[:6]:
   student.teacher = teacher #where teacher is your hired teacher
   student.save()

如果您的学生可以有多个老师，那么您需要使用多对多关系 (https://docs.djangoproject.com/en/3.0/topics/db/examples/many_to_many/)

class Student(AbstractUser):
    mobile_number = models.TextField()
    teacher = models.ManyToManyField("Teacher", related_name="students")

如果要将多个学生分配给一位老师，您可以：

student1 = Student.objects.get(pk=...)
student2 = Student.objects.get(pk=...)
...
teacher.students.set([student1, student2, ...]) # this will replace all students with selected
teacher.students.add([student1, student2, ...]) # this will add selected students to other students connected with this teacher