我正在尝试为个人财产获取平面图的表格。我可以检查数据库中是否存在该对象，但是当我尝试使用它的实例创建表单时，我收到此错误：
Traceback:
File "/Users/balrog911/Desktop/mvp/mvp_1/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
130. % (callback.__module__, view_name))
Exception Type: ValueError at /dashboard-property/253/
Exception Value: The view properties.views.dashboard_single_property didn't return an HttpResponse object. It returned None instead.
我的models.py:
class Property(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, blank=True, related_name='user')
name = models.CharField(max_length=120, help_text="This is the name that will display on your profile")
image = models.ImageField(upload_to='properties/', null=True, blank=True)
options=(('House', 'House'),('Condo','Condo'),('Apartment','Apartment'))
rental_type = models.CharField(max_length=120, blank=True, null=True, choices=options, default='Apartment')
address = models.CharField(max_length=120)
phone_number = models.CharField(max_length=120, blank=True, null=True)
email = models.EmailField(max_length=120, blank=True, null=True)
website = models.CharField(max_length=250, blank=True, null=True)
description = models.CharField(max_length=500, blank=True, null=True)
lat = models.CharField(max_length=120, blank=True, null=True)
lng = models.CharField(max_length=120, blank=True, null=True)
coordinates =models.CharField(max_length=120, blank=True, null=True)
slug = models.SlugField(unique=True, max_length=501)
active = models.BooleanField(default= True)
date_added = models.DateTimeField(auto_now_add=True)
def save(self):
super(Property, self).save()
max_length = Property._meta.get_field('slug').max_length
slug_name = slugify(self.name)
self.slug = '%s-%d' % (slug_name, self.id)
self.coordinates = geo_lat_lng(self.address)
self.lat = self.coordinates[0]
self.lng = self.coordinates[1]
super(Property, self).save()
def __unicode__(self):
return '%s-%s-%s' % (self.id, self.name, self.address)
def get_absolute_url(self):
return reverse("single_property", kwargs={"slug": self.slug})
def get_dashboard_url(self):
return reverse("dashboard_single_property", kwargs={"id": self.id})
class FloorPlan(models.Model):
property_name = models.ForeignKey(Property, related_name='property_name')
floor_plan_name = models.CharField(max_length=120, blank=True, null=True)
numbers = (('0','0'),('1','1'),('2','2'),('3','3'),('4','4'),('5','5'),('6+','6+'),)
bedrooms = models.CharField(max_length=120, blank=True, null=True, choices=numbers)
bathrooms = models.CharField(max_length=120, blank=True, null=True, choices=numbers)
sqft = models.IntegerField(max_length=120, blank=True, null=True)
min_price = models.IntegerField(max_length=120, blank=True, null=True)
max_price = models.IntegerField(max_length=120, blank=True, null=True)
availability = models.DateField(null=True, blank=True, help_text='Use mm/dd/yyyy format')
image = models.ImageField(upload_to='floor_plans/', null=True, blank=True)
def __unicode__(self):
return '%s' % (self.property_name)
我的views.py:
def dashboard_single_property(request, id):
if request.user.is_authenticated():
user = request.user
try:
single_property = Property.objects.get(id=id)
user_properties = Property.objects.filter(user=user)
if single_property in user_properties:
user_property = Property.objects.get(id=id)
#Beginning of Pet Policy Instances
user_floor_plan = FloorPlan.objects.select_related('Property').filter(property_name=user_property)
if user_floor_plan:
print user_floor_plan
plans = user_floor_plan.count()
plans = plans + 1
FloorPlanFormset = inlineformset_factory(Property, FloorPlan, extra=plans)
formset_floor_plan = FloorPlanFormset(instance=user_floor_plan)
print "formset_floor_plan is True"
else:
floor_plan_form = FloorPlanForm(request.POST or None)
formset_floor_plan = False
print 'formset is %s' % (formset_floor_plan)
#End
#Beginning of Pet Policy Instances
user_pet_policy = PetPolicy.objects.select_related('Property').filter(property_name=user_property)
print user_pet_policy
if user_pet_policy:
print user_pet_policy
#pet_policy_form = PetPolicyForm(request.POST or None, instance=user_pet_policy)
pet_policy_form = PetPolicyForm(request.POST or None)
else:
pet_policy_form = PetPolicyForm(request.POST or None)
#End
basic_form = PropertyForm(request.POST or None, instance=user_property)
context = {
'user_property': user_property,
'basic_form': basic_form,
'floor_plan_form': floor_plan_form,
'formset_floor_plan': formset_floor_plan,
'pet_policy_form': pet_policy_form,
}
template = 'dashboard/dashboard_single_property.html'
return render(request, template, context)
else:
return HttpResponseRedirect(reverse('dashboard'))
except Exception as e:
raise e
#raise Http404
print "whoops"
else:
return HttpResponseRedirect(reverse('dashboard'))
编辑：提出Vishen的提示以确保错误被引发，更新了视图，现在我收到此错误。这是完整的追溯：
Environment:
Request Method: GET
Request URL: http://localhost:8080/dashboard-property/253/
Django Version: 1.7.4
Python Version: 2.7.5
Installed Applications:
('django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.sites',
'django.contrib.sitemaps',
'django.contrib.staticfiles',
'base',
'properties',
'renters',
'allauth',
'allauth.account',
'crispy_forms',
'datetimewidget',
'djrill',
'import_export',
'multiselectfield')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.locale.LocaleMiddleware')
Traceback:
File "/Users/balrog911/Desktop/mvp/mvp_1/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
111. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/balrog911/Desktop/mvp/mvp_1_live/src/properties/views.py" in dashboard_single_property
82. raise e
Exception Type: AttributeError at /dashboard-property/253/
Exception Value: 'QuerySet' object has no attribute 'pk'
修改 根据Vishen的建议，删除了try语句以查看错误是否会更清楚。看起来问题出在第51行：
formset_floor_plan = FloorPlanFormset(instance=user_floor_plan)
这是追溯：
Traceback:
File "/Users/balrog911/Desktop/mvp/mvp_1/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
111. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/balrog911/Desktop/mvp/mvp_1_live/src/properties/views.py" in dashboard_single_property
51. formset_floor_plan = FloorPlanFormset(instance=user_floor_plan)
File "/Users/balrog911/Desktop/mvp/mvp_1/lib/python2.7/site-packages/django/forms/models.py" in __init__
855. if self.instance.pk is not None:
Exception Type: AttributeError at /dashboard-property/253/
Exception Value: 'QuerySet' object has no attribute 'pk'
答案 0 :(得分：0)
问题在于，如果在Exception语句中引发try，则会抓住它，打印＆＃34;呐喊＆＃34;然后函数结束而不返回任何东西;需要返回HttpResponse的地方。有几种方法可以解决这个问题，但我建议将except设为以下
except Exception as e:
raise e # This will throw a 500
我猜测try语句中的某些内容是错误的，但您正在对其进行静音。但是你应该抛出错误，这样你就可以看到并修复任何破坏的东西。
答案 1 :(得分：0)
您需要为第一个if语句返回一些内容。您收到该错误，因为如果该语句有效，则不会返回任何内容。
def dashboard_single_property(request, id):
if request.user.is_authenticated():
user = request.user
try:
single_property = Property.objects.get(id=id)
user_properties = Property.objects.filter(user=user)
if single_property in user_properties:
user_property = Property.objects.get(id=id)
#Beginning of Pet Policy Instances
user_floor_plan = FloorPlan.objects.select_related('Property').filter(property_name=user_property)
if user_floor_plan:
print user_floor_plan
plans = user_floor_plan.count()
plans = plans + 1
FloorPlanFormset = inlineformset_factory(Property, FloorPlan, num=plans)
formset_floor_plan = FloorPlanFormset(instance=user_floor_plan)
print "formset_floor_plan is True"
else:
floor_plan_form = FloorPlanForm(request.POST or None)
formset_floor_plan = False
print 'formset is %s' % (formset_floor_plan)
#End
#Beginning of Pet Policy Instances
user_pet_policy = PetPolicy.objects.select_related('Property').filter(property_name=user_property)
print user_pet_policy
if user_pet_policy:
print user_pet_policy
#pet_policy_form = PetPolicyForm(request.POST or None, instance=user_pet_policy)
pet_policy_form = PetPolicyForm(request.POST or None)
else:
pet_policy_form = PetPolicyForm(request.POST or None)
#End
basic_form = PropertyForm(request.POST or None, instance=user_property)
context = {
'user_property': user_property,
'basic_form': basic_form,
'floor_plan_form': floor_plan_form,
'formset_floor_plan': formset_floor_plan,
'pet_policy_form': pet_policy_form,
}
template = 'dashboard/dashboard_single_property.html'
return render(request, template, context)
else:
return HttpResponseRedirect(reverse('dashboard'))
except:
#raise Http404
print "whoops"
#RETURN SOMETHING HERE ! ! !
else:
return HttpResponseRedirect(reverse('dashboard'))