我有一個包含兩個欄位的表單。應要求用戶僅選擇兩者之一。不是兩者都不是。我嘗試通過覆寫 Django Doc 中描述的 clean 方法來解決這個問題：
表格.py
class ConfigureWorkout(forms.Form):
first_exercise = forms.ModelChoiceField(empty_label="select", label="Choose First Exercise", queryset=FirstExercise.objects.all(), required=False)
sec_exercise = forms.ModelChoiceField(empty_label="select", label="Choose Sec Exercise", queryset=SecExercise.objects.all(), required=False)
def clean(self):
first_exercise = self.cleaned_data.get("first_exercise")
sec_exercise = self.cleaned_data.get("sec_exercise")
if first_exercise and sec_exercise:
raise forms.ValidationError("Enter either a First Exercise or a Secondary Exercise.")
else:
return self.cleaned_data
視圖.py
def configure(request):
configure_workout = ConfigureWorkout()
if request.method == "GET":
return render(request, "userprofile/some.html", configure_workout)
else:
return render(request, "app/other.html")
模板
<form action="{% url 'configure' %}" method="POST">
{% csrf_token %}
{{ configure_workout }}
<input type="submit" name="configuration_completed">
</form>
但是，如果我通過選擇表單中的兩個欄位進行測驗，則不會顯示/引發錯誤。我成功通過了表單并被發送到“other.html”。
我錯過了什么？非常感謝您提供任何幫助:)
uj5u.com熱心網友回復：
您似乎沒有將實際資料傳遞給表單。也許這會有所幫助：
def configure(request):
configure_workout = ConfigureWorkout()
if request.method == "GET":
return render(request, "userprofile/some.html", configure_workout)
else:
configure_workout = ConfigureWorkout(request.POST)
configure_workout.is_valid()
configure_workout.clean()
return render(request, "app/other.html")
uj5u.com熱心網友回復：
基于@trafalinos 的回答并查看Forms上的檔案，我建議執行以下操作：
在forms.py：
class ConfigureWorkout(forms.Form):
first_exercise = forms.ModelChoiceField(empty_label="select", label="Choose First Exercise", queryset=FirstExercise.objects.all(), required=False)
sec_exercise = forms.ModelChoiceField(empty_label="select", label="Choose Sec Exercise", queryset=SecExercise.objects.all(), required=False)
def clean(self):
cleaned_data = super().clean() # compare documentation
first_exercise = cleaned_data.get("first_exercise")
sec_exercise = cleaned_data.get("sec_exercise")
if first_exercise and sec_exercise:
raise forms.ValidationError("Enter either a First Exercise or a Secondary Exercise.")
else:
return self.cleaned_data
和（歸功于 trafalino）在views.py：
def configure(request):
if request.method == "GET":
configure_workout = ConfigureWorkout()
return render(request, "userprofile/some.html", configure_workout)
else:
configure_workout = ConfigureWorkout(request.POST)
configure_workout.clean()
return render(request, "app/other.html")
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