在django中插入一对一的字段值 [英] Insert One to One field value in django

问题描述

  class PatientInfo（models.Model）：
 lastname = models.CharField （'Last Name'，max_length = 200）
 firstname = models.CharField（'First Name'，max_length = 200）
 middlename = models.CharField（'Middle Name'，max_length = 200）
 ... 
 def get_absolute_url（self）：
 return reverse（'patient：medical-add'，kwargs = {'pk'：self.pk}）
 
 
类MedicalHistory（models.Model）：
 patient = models.OneToOneField（PatientInfo，on_delete = models.CASCADE，primary_key = True，）
 ... 
  

，并且在提交PatientInfo表格时它将转到提供MedicalHistory Details的另一个表格。我可以看到我的PatientInfo数据以及MedicalHistory数据，但没有相互关联。以下是我的MedicalCreateView，它处理我的MedicalHistory表单。

  class MedicalCreateView（CreateView）：
 
 template_name = 'patient / medical_create.html'
 model = MedicalHistory 
 form_class = MedicalForm 
 
 def post（self，request，pk）：
 form = self.form_class（request .POST）
 
 
 if form.is_valid（）：
 patiente = form.save（commit = False）
 physician_name = form.cleaned_data ['physician_name'] ＃不要删除
 patient = PatientInfo.objects.all（id = self.kwargs ['pk']）
 
 MedicalHistory.patient = self.kwargs ['pk'] 
 
 
 patiente.save（）
 messages.success（请求，％s被添加到患者列表中％physician_name）
 
返回重定向（'index' ）
 else：
 print（form.errors）
  

这就是我设置MedicalHistor y.patient字段使用PatientInfo.pk

  MedicalHistory.patient = self.kwargs ['pk'] 
  

解决方案

如果您使用 OneToOneField 并且想要自动连接 MedicalHistory 到 PatientInfo ，您需要使用信号 b

$ p $ class MedicalHistory（models.Model）：
patient = models.OneToOneField（PatientInfo，on_delete = models.CASCADE，primary_key = True，）
。 。 。 。 。

@receiver（post_save，sender = PatientInfo）
def create_medical_history（发件人，实例，创建，** kwargs）：
如果创建：
MedicalHistory.objects。 create（patient = instance）

@receiver（post_save，sender = PatientInfo）
def save_medical_history（sender，instance，** kwargs）：
instance.medicalhistory.save（）


浏览

  class MedicalCreateView（CreateView）：
 
 template_name ='patient / medical_create.html'
 model = MedicalHistory 
 form_class = MedicalForm 
 success_url ='/'
  

I have the following models.

class PatientInfo(models.Model):
    lastname = models.CharField('Last Name', max_length=200)
    firstname = models.CharField('First Name',max_length=200)
    middlename = models.CharField('Middle Name',max_length=200)
    ...
    def get_absolute_url(self):
       return reverse('patient:medical-add', kwargs={'pk': self.pk})


class MedicalHistory(models.Model):
    patient = models.OneToOneField(PatientInfo, on_delete=models.CASCADE, primary_key=True,)
    ...

and upon submitting PatientInfo form it will go to another form which supply the MedicalHistory Details. I can see my PatientInfo data as well as MedicalHistory data but not linked to each other. Below is my MedicalCreateView which process my MedicalHistory form.

class MedicalCreateView(CreateView):

    template_name = 'patient/medical_create.html'
    model = MedicalHistory
    form_class = MedicalForm

    def post(self, request, pk):
        form = self.form_class(request.POST)


        if form.is_valid():
            patiente = form.save(commit=False)
            physician_name = form.cleaned_data['physician_name'] # do not delete
            patient = PatientInfo.objects.all(id=self.kwargs['pk'])

            MedicalHistory.patient = self.kwargs['pk']


            patiente.save()
            messages.success(request, "%s is added to patient list" % physician_name )

            return redirect('index')
        else:
            print(form.errors)

This is how I set MedicalHistory.patient field using the PatientInfo.pk

MedicalHistory.patient = self.kwargs['pk']

解决方案

If you are using OneToOneField and want to link MedicalHistory to PatientInfo automatically you need to use signals.

class MedicalHistory(models.Model):
    patient = models.OneToOneField(PatientInfo, on_delete=models.CASCADE, primary_key=True,)
    . . . . . 

@receiver(post_save, sender=PatientInfo)
def create_medical_history(sender, instance, created, **kwargs):
    if created:
        MedicalHistory.objects.create(patient=instance)

@receiver(post_save, sender=PatientInfo)
def save_medical_history(sender, instance, **kwargs):
    instance.medicalhistory.save()

Views

class MedicalCreateView(CreateView):

    template_name = 'patient/medical_create.html'
    model = MedicalHistory
    form_class = MedicalForm
    success_url = '/'

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