保存一個django對象從一個表格獲取另一個模型實例作爲外鍵

Question

我被困在試圖保存從另一個模型的外殼作爲外鍵獲取的模型實例。

模型

class Customer(models.Model): 
    owner = models.ForeignKey(User) 
    custname = models.CharField() 

class Appointment(models.Model): 
    user = models.ForeignKey(User) 
    start = models.DateTimeField() 
    end = models.DateTimeField() 
    customer = models.ForeignKey(Customer) 

形式

class AppointmentForm(forms.Form): 
    basedate = forms.DateField() 
    start = forms.TimeField(widget=forms.Select()) 
    end = forms.IntegerField(widget=forms.Select()) 
    customer = forms.ModelMultipleChoiceField(queryset=Customer.objects.all()) 

，我是不是能夠得到一個通用的FormView工作的方法：

def form_valid(self, form): 
    if form.is_valid(): 
     appointment = Appointment() 
     appointment.user = self.request.user 
     basedate = form.cleaned_data['basedate'] 
     start = form.cleaned_data['start'] 
     duration = form.cleaned_data['end'] 
     appointment.start = datetime.datetime.combine(basedate, start) 
     appointment.end = appointment.start + datetime.timedelta(minutes=duration) 
     appointment.save() 
     return super(AppointmentCreate, self).form_valid(form) 

，我應該在最後添加什麼方法從窗體中讀取外鍵客戶，並將其傳遞給約會？是否有任何過濾方式，以便在表單中只顯示屬於request.user的用戶？

非常感謝您的幫助。

Answer 1

像這樣的東西應該工作。幾件事：

1）我改變了表單字段爲ModelChoiceField而不是多選。您需要使用ModelChoiceField來顯示關係。我從MultipleChoice改變了這一點，因爲根據你的模型，你只想保存一個選擇。您可以在這裏閱讀更多有關ModelChoiceField的信息：https://docs.djangoproject.com/en/dev/ref/forms/fields/

2）在您的表格中，我將選擇查詢更改爲customer = forms.ModelChoiceField(queryset=Customer.objects.filter(owner=request.user)。這將僅針對特定用戶的客戶進行過濾。

forms.py

class AppointmentForm(forms.Form): 
    def __init__(self, *args, **kwargs): 
     self.request = kwargs.pop("request") 
     super(AppointmentForm, self).__init__(*args, **kwargs) 

    basedate = forms.DateField() 
    start = forms.TimeField(widget=forms.Select()) 
    end = forms.IntegerField(widget=forms.Select()) 
    customer = forms.ModelChoiceField(queryset=Customer.objects.filter(owner=request.user)) 

views.py

def form_valid(self, form): 
    if request.method=='POST': 
     form = AppointmentForm(request.POST, request=request) 
     if form.is_valid(): 
      appointment = Appointment() 
      appointment.user = self.request.user 
      basedate = form.cleaned_data['basedate'] 
      start = form.cleaned_data['start'] 
      duration = form.cleaned_data['end'] 
      appointment.customer = form.cleaned_data['customer'] 
      appointment.start = datetime.datetime.combine(basedate, start) 
      appointment.end = appointment.start + datetime.timedelta(minutes=duration)  
      appointment.save() 
      return super(AppointmentCreate, self).form_valid(form) 
    else: 
     form = AppointmentForm() 

Answer 2

最後我做到了。關鍵是要覆蓋FormView控件類的得到方法views.py，而不是在forms.py修改INIT：

forms.py：

class AppointmentForm(forms.Form): 
    basedate = forms.DateField() 
    start = forms.TimeField(widget=forms.Select()) 
    end = forms.IntegerField(widget=forms.Select()) 
    customer = forms.ModelChoiceField(queryset=Customer.objects.all()) 
    ... 

views.py：

def get(self, request, *args, **kwargs): 
     """ 
     Handles GET requests and instantiates a blank version of the form. 
     """ 
     choices_start, choices_duration = self._get_choices() 
     form_class = self.get_form_class() 
     form = self.get_form(form_class) 
     form.fields['start'].widget=forms.Select(choices=choices_start) 
     form.fields['end'].widget=forms.Select(choices=choices_duration) 
     form.fields['customer'].queryset=Customer.objects.filter(owner=request.user) 
     return self.render_to_response(self.get_context_data(form=form)) 

@Dan：非常感謝您的幫助。