创建后分配外键值（登录用户） [英] Assign Foreign Key Value after creating ( Logged In User )

问题描述

我使用CBV有一个createview

I have a createview using CBV

class StudentCreate(LoginRequiredMixin, CreateView):

    login_url = '/signin/'
    model = Student
    fields = ['first_name', 'last_name' ]
    success_url = '/dashboard/'

各个模型。py

class Class_teacher(models.Model):

    first_name = models.CharField(max_length=200)
    last_name = models.CharField(max_length=200)
    standard = models.IntegerField()
    division = models.CharField(max_length=1)
    subject = models.CharField(max_length=200)
    email = models.CharField(max_length=30)


class Student(models.Model):

    first_name = models.CharField(max_length=200)
    last_name = models.CharField(max_length=200)
    classteacher = models.ForeignKey('Class_teacher', on_delete=models.SET_NULL,blank=True, null=True )

webapp具有登录功能。当用户（classteacher）登录时，他们可以添加学生。我想要的是Student（模型Form）中的classteacher字段应自动设置为user，即classteacher。 （Classteacher），并且在创建该学生之后应将其保存在数据库中。 Classteacher模型已使用相应的必填字段进行了更新。

The webapp has a login feature . When the user ( classteacher ) login they can add students. What I want is classteacher field in Student(model Form ) should be automatically set as user which is the classteacher. ( Classteacher ) and should be saved in the db after creating the student. Classteacher model is updated with respective required fields .

推荐答案

查看此处了解 CreateView 的各种方法，您可以覆盖。

Look here for the various methods of a CreateView that you can override.

在您的情况下，您想覆盖 form_valid（）方法，当新的学生将被保存。

In your case, you want to override the form_valid() method, which is called when the new Student will be saved.

from django.shortcuts import get_object_or_404

def form_valid(self, form):
    self.object = form.save(commit=False)
    self.object.classteacher = get_object_or_404(Class_teacher, email=self.request.user.email)
    self.object.save()
    return super().form_valid(form)

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