我在 Django 中定義表單時(shí)遇到問(wèn)題（python 3.7，django 3.0.8）我創(chuàng)建了一個(gè)模型。這個(gè)模型有兩個(gè)非常重要的字段：date 和 user_id。要求：date和user_id是唯一的。我創(chuàng)建了一個(gè)與模型關(guān)聯(lián)的表單模型。登錄用戶填寫表格，重要的是定義的日期不能是過(guò)去的，也不能出現(xiàn)在數(shù)據(jù)庫(kù)中。我的問(wèn)題：一個(gè)問(wèn)題：我的驗(yàn)證與過(guò)去的日期相關(guān)聯(lián) WORKS CORRECT[!]，但如果給出了過(guò)去的日期，則不會(huì)顯示任何錯(cuò)誤消息。第二個(gè)問(wèn)題：第二件事是我不知道如何防止定義數(shù)據(jù)，它存在于數(shù)據(jù)庫(kù)中。代碼：模型.pyclass MyModel(models.Model): user = models.ForeignKey(User, on_delete=models.CASCADE) date = models.DateField() ...(other fields) class Meta: unique_together = [['user', 'date']]代碼：forms.pyclass AddMyModel(forms.Form): date = forms.DateField(widget=DateInput(attrs={'type': 'date'}), ) def clean_date(self): date = self.cleaned_data['date'] if date < timezone.now().date(): raise ValidationError("Date cannot be in the past") return date您是否知道如何設(shè)計(jì)表單以在模板中顯示錯(cuò)誤“日期不能來(lái)自過(guò)去”和錯(cuò)誤“給定日期已定義”？views.pydef add(request): if request.user.is_authenticated: user = request.user.id if request.method == 'POST': form = AddMyModel(request.POST) if form.is_valid(): date = form['date'].value() mymodel= MyModel(user=User(pk=user), date=date) mymodel.save() return render(request, 'mysite/successfuladd.html', {"login": True}) form = AddMyModel() return render(request, 'mysite/add.html', {'form': form, 'login': True}) else: return render(request, 'mysite/homepage.html', {'login': False})
2 回答
ITMISS
TA貢獻(xiàn)1871條經(jīng)驗(yàn) 獲得超8個(gè)贊
用日期時(shí)間試試這個(gè)：
def clean_date(self):
date = self.cleaned_data['date']
if date < datetime.date.today():
raise ValidationError(self.error_messages['Date cannot be in the past'], code='Date cannot be in the past')
return date
jeck貓
TA貢獻(xiàn)1909條經(jīng)驗(yàn) 獲得超7個(gè)贊
我設(shè)法自己解決了這個(gè)問(wèn)題。我的模型是一樣的。
forms.py
class AddMyModel(forms.ModelForm):
def clean_date(self):
date = self.cleaned_data['date']
if date < timezone.now().date():
raise forms.ValidationError(message='Date cannot be in the past')
return date
class Meta:
model = MyModel
fields = ('date')
widgets = {
'date': forms.DateInput(attrs={'type': 'date'})
}
views.py
def add(request):
if request.user.is_authenticated:
user = request.user.id
if request.method == 'POST':
form = AddMyModel(request.POST)
if form.is_valid():
date = form['date'].value()
if MyModel(user=User(pk=user), date=date):
unique_error = "User and date is already exist."
return render(request, 'mysite/add.html',
{'form': form, 'login': True, 'unique_error': unique_error})
else:
mymodel= MyModel(user=User(pk=user), date=date)
mymodel.save()
return render(request, 'mysite/successfuladd.html', {"login": True})
return render(request, 'mysite/add.html',
{'form': form, 'login': True})
form = AddMyModel()
return render(request, 'mysite/add.html', {'form': form, 'login': True})
else:
return render(request, 'mysite/homepage.html', {'login': False})
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