我有一个表单在django中不断向我抛出一个错误,我尝试在我的模型上搜索online tried str(),但根本不起作用。google上有几次尝试了几种不同的方法,但都没有成功,每次我单击表单链接时仍然会得到相同的django错误页面。
TypeError: __str__ returned non-string (type tuple)
我的模型
# Injury Parameters -> SOI Level 2 #
####################################
class SourceOfInjuryLevel2(models.Model):
creator = models.ForeignKey('auth.User')
id = models.AutoField(primary_key=True)
soi_l1 = models.CharField(max_length=80)
soi_l2 = models.CharField(max_length=80)
status = models.CharField(max_length=8)
created_date = models.DateTimeField(default=timezone.now)
modified_date = models.DateTimeField(blank=True, null=True)
modified_by = models.CharField(max_length=60, blank=True, null=True)
def create(self):
self.save()
def __str__(self):
return self.soi_l1, self.soi_l2, self.status
我的表格
# Soure of Injury Level 2 #
###########################
class SourceOfInjuryLevel2Form(forms.ModelForm):
options = (('Enabled', 'Enabled',), ('Disabled', 'Disabled'))
soi_l1 = forms.ModelChoiceField(
queryset=SourceOfInjuryLevel1.objects.filter(status='Enabled'),
widget=forms.Select(attrs={'class': 'form-control'})
)
soi_l2 = forms.CharField(
widget=forms.TextInput(attrs={'class': 'form-control'})
)
status = forms.CharField(
widget=forms.Select(
attrs={'class': 'form-control'},
choices=options
)
)
class Meta:
model = SourceOfInjuryLevel2
fields = ('soi_l1', 'soi_l2', 'status')
我的观点
# New Source of Injury Level 2 #
################################
def new_source_of_injury_level2(request):
form = SourceOfInjuryLevel2Form()
if request.method == "POST":
form = SourceOfInjuryLevel2Form(request.POST)
if form.is_valid():
source_of_injury_level2 = form.save(commit=False)
source_of_injury_level2.creator = request.user
source_of_injury_level2.created_date = timezone.now()
source_of_injury_level2.save()
messages.success(request, 'Object Has Been Created')
return redirect(injury_parameters)
else:
messages.error(request, 'Object Has Not Been Created')
else:
form = SourceOfInjuryLevel2Form()
return render(request,
'process_injury_management/source_of_injury_level2.html',
{'form': form,
'title': 'New Source of Injury Level 2'})
错误在您的模型中:
我想您可能会感到困惑,因为Python 2 print语句看起来像是将元组转换为字符串,但实际上print语句并不是这样工作的——这是Python 3中更改的一个令人困惑的细节。
请改为:
那些逗号实际上并不像你想象的那样。逗号使返回值成为tuple,而不是a
__str__
方法应该返回的字符串。你可以改为:
或者使用新样式的格式:
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