我的用户注册表单包含一个ForeignKeyField，并且我正在尝试在视图中设置此ForeignKeyField的值。从下面的代码中可以看出，我向视图传递了一个参数“ pk”，该参数用于在呈现表单之前设置ForeignKeyField值，但这似乎不起作用。发布表单后，出现此错误“（（1048，“ Column'package_id'不能为空”））。
这是我的观点。
def subscribe_view(request, billing_cycle, pk):
if request.method == 'POST':
userRegForm = CustomUserForm(request.POST)
companyForm = CompanyProfileForm(request.POST)
if userRegForm.is_valid() and companyForm.is_valid():
user = userRegForm.save()
compProfile = companyForm.save(commit=False)
if compProfile.user_id is None:
compProfile.user_id = user.id
compProfile.save()
selected_provinces = companyForm.cleaned_data['provinces']
selected_cats = companyForm.cleaned_data['tenderCategory']
selected_package = companyForm.cleaned_data['package']
for province_item in selected_provinces:
compProfile.provinces.add(province_item)
for cat_item in selected_cats:
compProfile.tenderCategory.add(cat_item)
keyword_ids_str = companyForm.cleaned_data['keywordListItem']
if keyword_ids_str is not '' or keyword_ids_str is not None:
keyword_ids = keyword_ids_str.split(',')[:-1]
for keyword_id in keyword_ids:
keywordObj = Keywords.objects.get(id=int(keyword_id.strip()))
compProfile.keywords.add(keywordObj)
compProfile.package(selected_package)
return HttpResponseRedirect('/user_account/dashboard')
else:
return HttpResponseRedirect(request.path)
else:
packageOption = Packages.objects.get(id=pk)
if billing_cycle == '1' or billing_cycle == '0':
b_cycle = billing_cycle
else:
b_cycle = '0'
userRegForm = CustomUserForm()
companyProfileForm = CompanyProfileForm(initial={'package': packageOption.id})
bankingDetailsForm = BankingDetailsForm()
#companyProfileForm.fields["package"].initial = packageOption.id
args = {'userRegForm': userRegForm,
'package': packageOption,
'billing_cycle': b_cycle,
'companyProfileForm': companyProfileForm,
'bankingDetailsForm': bankingDetailsForm
}
args.update(csrf(request))
return render(request, 'user_account/subscribe.html', args)
这是模特：
class CompanyProfile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE, primary_key=True)
companyName = models.CharField(max_length=200, blank=False)
companyRegNum = models.CharField(max_length=30, blank=True)
contactNumber = models.CharField(max_length=20, blank=False)
address = models.CharField(max_length=300, blank=True)
areaCode = models.CharField(max_length=10, blank=False)
deliveryEmails = models.TextField(blank=True) #this is the list of all the people chosen to recieve daily notification.
tenderCategory = models.ManyToManyField(category, blank=False) #links the user to the chosen category.
provinces = models.ManyToManyField(Province, blank=False) #links the user to the chosen Provinces.
package = models.ForeignKey(Packages, blank=False) #links the user to the chosen package.
pymntMethod = models.IntegerField(blank=True, default=3) #this is the chosen payment method (e.g credit card=1, debit order=2 or direct debit=3)
keywords = models.ManyToManyField(Keywords) #links the user to the chosen keywords.
extraKeywords = models.TextField(default='', blank=True) #this field acts as a container of extra keywords from the user. These are keywords that we do not have in our database.
termsAndConditions = models.BooleanField(blank=False, default=1) #this is the T&C's field that must be agreed to by the client.
commencementDate = models.DateTimeField(default=timezone.now, blank=True)
def __str__(self):
return self.companyName
这是我的表格。
class CompanyProfileForm(ModelForm):
provinces = forms.ModelMultipleChoiceField(queryset=Province.objects.all(), widget=forms.SelectMultiple(attrs={
'id': 'provinces'
}))
tenderCategory = forms.ModelMultipleChoiceField(queryset=category.objects.all(), widget=forms.SelectMultiple(attrs={
'id': 'catSelect'
}))
keywordListItem = forms.CharField(widget=forms.HiddenInput(attrs={
'id': 'keywordListItem_id'
}))
class Meta:
model = CompanyProfile
exclude = (
'user',
'keywords',
'commencementDate',
'package',
)
fields = (
'companyName',
'companyRegNum',
'contactNumber',
'address',
'areaCode',
'deliveryEmails',
'provinces',
'tenderCategory',
'termsAndConditions',
)
widgets = {
'companyName': forms.TextInput(attrs={
'class': 'form-control',
'id': 'companyNameId',
'name': 'companyName',
'required': 'required',
'data-rule-required': 'true',
'data-msg-required': 'Please enter company name'
}),
'companyRegNum': forms.TextInput(attrs={
'class': 'form-control',
'id': 'companyRegNumId',
'name': 'companyRegNum',
'required': 'required',
'data-rule-required': 'true',
'data-msg-required': 'Please enter company reg number'
}),
'contactNumber': forms.TextInput(attrs={
'class': 'form-control input_field',
'id':'contactNum',
'name': 'contactNumber',
'required': 'required',
'data-rule-required': 'true',
'data-msg-required': 'Please enter contact number'
}),
'address': forms.TextInput(attrs={
'class': 'form-control',
'id': 'addressId',
'name': 'address',
'required': 'required',
'data-rule-required': 'true',
'data-msg-required': 'Please enter the address'
}),
'areaCode': forms.TextInput(attrs={
'class': 'form-control',
'id': 'areaCodeId',
'name': 'areaCode',
'required': 'required',
'data-rule-required': 'true',
'data-msg-required': 'Please enter the areaCode'
}),
'deliveryEmails': forms.TextInput(attrs={
'class': 'form-control textInput',
'id': 'deliveryEmailId',
'name': 'deliveryEmails',
'required': 'required',
'data-rule-required': 'true',
'data-msg-required': 'Please enter the email address(s)'
}),
'package': forms.HiddenInput(),
'pymntMethod': forms.HiddenInput(attrs={
'id': 'pymntType',
'value': '3'
}),
'termsAndConditions': forms.CheckboxInput(attrs={
'id': 'termsAndConditions'
})
}
有人知道如何解决此错误吗？
答案 0 :(得分：0)
有些事情可能会助您一臂之力：
package被列为ForeignKey字段，未设置null=True，这是必填字段。这样，在保存模型实例之前需要有一个值。设置default属性的原因解决了该错误，原因是您现在为此提供的值不是null。如果这是一个允许为空的字段，请更新模型以使其包含null=True，并确保进行迁移以更新数据库，然后重试。
在更新package时，我注意到要分配的包就像传递给方法一样被传递给它。我不知道这是有效的，因为属性通常是通过直接分配（compProfile.package = selected_package）来更新的。
在更新模型实例的属性（compProfile是CompanyProfile的模型实例）时，对该实例的属性所做的任何更改都不会持久保存到数据库中，除非save()叫做。这意味着，如果稍后从数据库中获取它，则package将与分配的内容不匹配。确保在修改后调用compProfile.save()。