Question

我有一个提交数据的表单，但在提交到数据库之前，它将从外部获取值。

这是我的models.py

class Employee(models.Model):
    nik = models.CharField(max_length=100)
    name = models.CharField(max_length=100)

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse("system:detail",kwargs={'pk':self.pk})

class EmpLoan(models.Model):
    status = models.BooleanField()
    nominal = models.DecimalField(max_digits=10, decimal_places=0)
    emp = models.ForeignKey(Employee, related_name='emploan')
    created_at = models.DateTimeField(auto_now=True)
    updated_at = models.DateTimeField(auto_now_add=True, null=True)

    def __str__(self):
        return self.emp.name

class EmpInstallment(models.Model):
    nominal = models.DecimalField(max_digits=10, decimal_places=0)
    loan = models.ForeignKey(EmpLoan, related_name='empinstallment')
    created_at = models.DateTimeField(auto_now=True)

    def __str__(self):
        return self.loan.emp.name

view.py

class EmployeeCreateView(CreateView):
    fields = ()
    model = models.Employee

    def form_valid(self, form):
        self.object = form.save(commit=False)
        data = self.object.EmpLoan.EmpInstallment.object.get(id=1)

        self.object.nik = data
        self.object.save()

        return super(ModelFormMixin, self).form_valid(form)

如何访问EmpInstallment上的数据？...

我正在尝试使用此data = self.object.EmpLoan.EmpInstallment.object.get(id=1)

但它不起作用。

依然是django的学习者和非常棒的人

Answer 1

EmpInstallment - ＆gt; ForeignKey to ---＆gt; EmpLoan -----＆gt; ForeignKey to --- Employee

class EmployeeCreateView(CreateView):
fields = ()
model = models.Employee

def form_valid(self, form):
    employee_instance = form.save(commit=False)
    # try to get the emploan instance
    emploan = employee_instance.emploan.first()
    if emploan:
        empinstallment = emploan.empinstallment.first()
        if empinstallment:
             pass # there you can execute your codes


# there you have access to empinstallment

django在CreateView类上访问foreignkey值

1 个答案: