如何从其他模型Django中保存对象字段

Question

首先，我像这样扩展抽象用户：

class MyProfile(AbstractUser):
    first_name = models.CharField(max_length=100)
    last_name = models.CharField(max_length=100)
    full_name = models.CharField(max_length=255)
    id_number = models.CharField(max_length=14)

    def __str__(self):
        return self.full_name

    def save(self, *args, **kwargs):
        self.full_name = '{0} {1}'.format(self.first_name, self.last_name)
        super().save(*args, **kwargs)

然后参考如下其他模型：

class MyModel(models.Model):
    member = models.OneToOneField(MyProfile, on_delete=models.CASCADE)
    description = models.CharField(max_length=255)

    def __str__(self):
        return self.member

这是形式：

class MyModelForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

    class Meta:
        model = MyModel
        fields = ('description')

    full_name = forms.CharField(required=False, label="", widget=forms.TextInput(attrs={'class': "form-control"}))
    id_number = forms.CharField(required=False, label="", widget=forms.TextInput(attrs={'class': "form-control"}))
    description = forms.CharField(required=False, label="", widget=forms.TextInput(attrs={'class': "form-control"}))

这是视图：

def applicationdata(request):
   if request.method == 'POST':
      form = MyModelForm(request.POST or None) 
      if form.is_valid():
         form.save()
      return HttpResponseRedirect('/index/')
      else:
         print(form.errors)
   else:
      form = MyModelForm()

   context = {
      'form': form,
   }
   return render(request, 'index.html', context)

我的问题是:

> < li>

如何显示全名字段

以及如何通过应用程序数据的视图将这些字段保存到MyModel模型中的成员字段中？

更新

1. 我更新了AbstractUser模型，因为我忘记添加first_name

Answer 1

如何显示全名字段

如果您打算显示它以在之后更改它，则必须覆盖__init__方法以在两个字段上设置初始数据：也许这个答案可以提供帮助

以及如何通过应用程序数据的视图将这些字段保存到MyModel模型中的成员字段中？

entity = form.save() # this gives you the updated MyModel instance

然后将表单中的数据保存到相关的模型中，如下所示:

 entity.member.full_name = form.cleaned_data['full_name']

应该按照：这个答案工作

Answer 2

首先，您可以删除first_name和last_name字段，因为您可以从full_name获取它

class MyProfile(AbstractUser):
    full_name = models.CharField(max_length=255)
    id_number = models.CharField(max_length=14)

    def __str__(self) -> str:
        return self.full_name

    @property
    def first_name(self) -> str:
        return self.full_name.split(' ')[0]

    @property
    def last_name(self) -> str:
        if self.full_name.split(' ') > 1:
            return self.full_name.split(' ')[1]
        return ''

class MyModelForm(forms.ModelForm):

    full_name = forms.CharField(required=False, label="", widget=forms.TextInput(attrs={'class': "form-control"}))
    id_number = forms.CharField(required=False, label="", widget=forms.TextInput(attrs={'class': "form-control"}))

    class Meta:
        model = MyModel
        fields = ('description')

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['description'].widget = forms.TextInput(attrs={'class': "form-control"})

    def save(self, *args, **kwargs):
        kwargs['commit'] = False
        my_model = super().save(*args, **kwargs)
        MyProfile.objects.update_or_create(
            full_name=self.cleaned_data['full_name'],
            id_number=self.cleaned_data['id_number'],
            mymodel=my_model
        )

如果＜code＞MyProfile

    def __init__(self, my_profile: MyProfile, *args, **kwargs):
        kwargs.update(initial={
            # 'field': 'value'
            'full_name': my_profile.full_name,
            'id_number': my_profile.id_number
        })
        super().__init__(*args, **kwargs)
        self.fields['description'].widget = forms.TextInput(attrs={'class': "form-control"})

Answer 3

这里不使用< code>ModelForm,最好使用< code>Form,因为我们并不特别使用模型字段。你的forms.py应该喜欢这个

class MyModelForm(forms.Form):

    full_name = forms.CharField(required=False, label="", widget=forms.TextInput(attrs={'class': "form-control"}))
    id_number = forms.CharField(required=False, label="", widget=forms.TextInput(attrs={'class': "form-control"}))
    description = forms.CharField(required=False, label="", widget=forms.TextInput(attrs={'class': "form-control"}))

而我们的视图方法需要根据需要存储的字段和数据进行完全定制。改变你的观点。py方法

def applicationdata(request):
   if request.method == 'POST':
      form = MyModelForm(request.POST or None) 
      if form.is_valid():
          profile = MyProfile.object.create(full_name=request.POST['full_name'], id_number=request.POST['id_number'])
          if profile is not None:
              MyModel.object.create(description=request.POST['description'], member=profile.pk)
              return HttpResponseRedirect('/index/')
          else:
              form.add_error('profile_out_of_bound', "please try to fill correct details!")

      print(form.errors)
   else:
      form = MyModelForm()

   context = {
      'form': form,
   }
   return render(request, 'index.html', context)

如果这不起作用，请纠正我。