django - Django EditStamdata() 得到了一个意外的关键字参数“实例”
问题描述
嘿嘿,
如果我加载表单,我会收到错误:
from django import forms
from .models import CountryList, Stamdata
from django.db.models.functions import Lower
from django.contrib.auth.models import User
class EditStamdata(forms.ModelForm):
Firmanavn = forms.CharField(widget=forms.TextInput(attrs={'class': 'form-control', 'autofocus': True}), label='Firmanavn')
EMail = forms.EmailField(widget=forms.EmailInput(attrs={'class': 'form-control', 'autofocus': True}), label='EMail')
Bank = forms.CharField(widget=forms.Textarea(attrs={'rows' :'4', 'class': 'form-control', 'autofocus': True}), label='Bank')
Navn = forms.CharField(widget=forms.TextInput(attrs={'class': 'form-control', 'autofocus': True}), label='Navn')
Adresse = forms.CharField(widget=forms.Textarea(attrs={'rows' :'4', 'class': 'form-control'}),label='Adresse')
Land = forms.ModelChoiceField(widget=forms.Select(attrs={'class': 'form-control'}),queryset=CountryList.objects.values_list('countryname', flat=True).order_by('code'), initial='Denmark', to_field_name='countryname')
CVRCountrycode = forms.ModelChoiceField(widget=forms.Select(attrs={'class': 'form-control col-md-4'}),label='CVR Landkode', queryset=CountryList.objects.values_list('code', flat=True).order_by('code'), initial='DK', to_field_name='code')
CVR = forms.IntegerField(widget=forms.TextInput(attrs={'class': 'form-control'}),label='CVR Nummer')
class Meta:
model = Stamdata
labels = {
'Byen': 'By',
'CVRCountrycode': 'Landekode',
'CVR': 'CVR Nummer',
}
fields = ['Firmanavn', 'UserID', 'Adresse', 'Land', 'CVRCountrycode', 'CVR', 'EMail', 'Bank', 'Navn']
和观点:
def EditStamdata(request):
StamdataData = get_object_or_404(Stamdata, pk=1)
# if this is a POST request we need to process the form data
if request.method == 'POST':
form = EditStamdata(request.POST, instance=StamdataData)
if form.is_valid():
form.save()
return HttpResponseRedirect('backend/stamdata.html')
else:
print ('somethin goes wrong')
form = EditStamdata(instance=StamdataData)
return render(
request,
'backend/stamdata.html',
{'form': form },
)
然后我收到了这个错误信息:
EditStamdata() 得到了一个意外的关键字参数“实例”
如果我用谷歌搜索它,如果他们使用 forms.ModelForm 但我会使用它。
解决方案
您为视图提供了与表单相同的名称,因此 Django 调用了视图函数。因此,您应该重命名两者中的至少一个。
通常在 Python 中,函数snake_case
是EditStamdata
用edit_stamdata
. 此外,Django 表单通常有一个Form
后缀。因此,您可以将表单重命名为EditStamdataForm
:
# app/forms.py
from django import forms
from .models import CountryList, Stamdata
from django.db.models.functions import Lower
from django.contrib.auth.models import User
class EditStamdataForm(forms.ModelForm):
Firmanavn = forms.CharField(widget=forms.TextInput(attrs={'class': 'form-control', 'autofocus': True}), label='Firmanavn')
EMail = forms.EmailField(widget=forms.EmailInput(attrs={'class': 'form-control', 'autofocus': True}), label='EMail')
Bank = forms.CharField(widget=forms.Textarea(attrs={'rows' :'4', 'class': 'form-control', 'autofocus': True}), label='Bank')
Navn = forms.CharField(widget=forms.TextInput(attrs={'class': 'form-control', 'autofocus': True}), label='Navn')
Adresse = forms.CharField(widget=forms.Textarea(attrs={'rows' :'4', 'class': 'form-control'}),label='Adresse')
Land = forms.ModelChoiceField(widget=forms.Select(attrs={'class': 'form-control'}),queryset=CountryList.objects.values_list('countryname', flat=True).order_by('code'), initial='Denmark', to_field_name='countryname')
CVRCountrycode = forms.ModelChoiceField(widget=forms.Select(attrs={'class': 'form-control col-md-4'}),label='CVR Landkode', queryset=CountryList.objects.values_list('code', flat=True).order_by('code'), initial='DK', to_field_name='code')
CVR = forms.IntegerField(widget=forms.TextInput(attrs={'class': 'form-control'}),label='CVR Nummer')
class Meta:
model = Stamdata
labels = {
'Byen': 'By',
'CVRCountrycode': 'Landekode',
'CVR': 'CVR Nummer',
}
fields = ['Firmanavn', 'UserID', 'Adresse', 'Land', 'CVRCountrycode', 'CVR', 'EMail', 'Bank', 'Navn']
在视图中,我们更改视图的名称,并为表单使用新名称:
def edit_stamdata(request):
StamdataData = get_object_or_404(Stamdata, pk=1)
if request.method == 'POST':
form = EditStamdataForm(request.POST, instance=StamdataData)
if form.is_valid():
form.save()
return HttpResponseRedirect('backend/stamdata.html')
else:
print ('somethin goes wrong')
form = EditStamdataForm(instance=StamdataData)
return render(
request,
'backend/stamdata.html',
{'form': form },
)
一些额外的提示:
- 局部变量通常也写在蛇的情况下,所以
stamdata_data
而不是StamdataData
; - 您可以使用
redirect(..)
[Django-doc],并传递视图名称以使 URL 解析更加健壮; - 在 Django 中,通常不使用URL
.html
路径的后缀;和 - one 通常不使用 a 定义 a
queryset=…
,.values_list(..)
这通常用于进行一些过滤。
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