Django：AttributeError - Object没有属性 [英] Django: AttributeError - Object has no attribute

问题描述

此视图抛出AttributeError说：'PhotoForm'对象没有属性'reservation'。会发生什么 - 功能通过，但实际上没有上传图像。在调试中，表单无效

我尝试打印

• form.reservation


• form.message


• form.photo

但是这显示了这个追溯（这是表单无效并且没有完成该功能的原因。

因为我建立了其他功能的工作，我有点困惑，感谢您的帮助！

HTML表单

 < form action =/ photo / new /method =post> {％csrf_token％} 
 < dl> 
< dt> {{form.reservation.label}}< / dt> 
< dd>< select name =reservation> {％ ％}< option value ={{reservation.id}}> {{reservation.date}} {{reservation.chef.cook.get_profile.firstname}}  -  {{reservations.guest.get_profile.firstname}} < / option> {％endfor％}< / select>< / dd> 
< d t> {{form.photo.label}}< / dt> 
< dd> {{form.photo}}< / dd> 
< dt> {{form.message.label}}< / dt> 
< dd> {{form.message}}< / dd> 
< / dl> 
< button type =submit> Submit< / button> 
< / form> 
  

查看

  @login_required 
 def new_photo（request，template_name =photo / newphoto.html）：
 
 meals = Reservation.objects.filter guest = request.user.id）
 form = PhotoForm（request.POST）
 form.data = {reservation：meals} 
如果request.method =='POST'：
 form.photographer = request.user 
 form.data.get（'reservation'）
打印form.reservation 
打印form.message 
打印form.photo 
如果form.is_valid（）：
打印hellos
 save_reservation_photo（request.FILES [photo]）
 photo = form.save（commit = False）
 photo.photographer = request.user 
 photo.save（）
 return HttpResponseRedirect（'/ photo /％d /'％photo.id）
 else：
 form = PhotoForm ）
 
 data = {'form'：form，'reservations'：meals，
'add'：True 
} 
 
 return render_to_respon se（template_name，
 data，
 context_instance = RequestContext（request））
  

表单

  class PhotoForm（forms.ModelForm）：
 class Meta：
 model =照片
 fields =（'reservation'，'photo'，'message'）
 
 def __init __（self，* args，** kwargs）：
 super（PhotoForm，self）.__ init __（* args，** kwargs）
  

：

 类照片（models.Model）：
 
 photographer = models.ForeignKey （用户）
 pub_date = models.DateTimeField（default = datetime.now，auto_now_add = True，db_index = True）
 reservation = models.ForeignKey（Reservation）
 
 message = models .CharField（default =''，max_length = 140）
 
 photo = models.ImageField（default =''，upload_to =reservation_images /）
  / pre> 
 
 
 追溯 
 追溯：
环境：
 
请求方法：POST 
请求URL：http://127.0.0.1:8000/photo/new/ 
 Django版本：1.2.3 
 Python版本：2.7.0 
安装的应用程序：
 [' django.contrib.auth'，
'django.contrib.contenttypes'，
'django.contrib.sessions'，
'django.contrib.sites'，
'django。 contrib.messages'，
'django.contrib.comments'，
'django.contrib.markup'，
'django.contrib.sitemaps'，
'lib.debug_toolbar' 
'src'，
'django.contrib.admin'] 
安装的中间件：
（'django.middleware.common.CommonMiddleware'，
'django。 contrib.sessions.middleware.SessionMiddleware'，
'django.middleware.csrf.CsrfViewMiddleware'，
'django.contrib.auth.middleware.AuthenticationMiddleware'，
'django.contrib.messages。中间件.MessageMiddleware'，
'lib.debug_toolbar.middleware.DebugToolbarMiddleware ）
 
 
追溯：
 
环境：
 
请求方法：POST 
请求URL：http：//127.0。 0.1：8000 / photo / new / 
 Django版本：1.2.3 
 Python版本：2.7.0 
安装的应用程序：
 ['django.contrib.auth'，
'django.contrib.contenttypes'，
'django.contrib.sessions'，
'django.contrib.sites'，
'django.contrib.messages'，
 'django.contrib.comments'，
'django.contrib.markup'，
'django.contrib.sitemaps'，
'lib.debug_toolbar'，
'src' 
'django.contrib.admin'] 
安装的中间件：
（'django.middleware.common.CommonMiddleware'，
'django.contrib.sessions.middleware.SessionMiddleware' 
'django.middleware.csrf.CsrfViewMiddleware'，
'django.contrib.auth.middleware.AuthenticationMiddleware'，
'django.contrib.messages.middleware.MessageMiddleware'，
 'lib.debug_toolbar.middleware.DebugToolbarMiddleware'）
 
 
追溯：
文件/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/handlers/base.py in get_response 
 100. response = callback（request，* callback_args，** callback_kwargs）
文件/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages /django/contrib/auth/decorators.pyin _wrapped_view 
 25. return view_func（request，* args，** kwargs）
文件/Users/emilepetrone/Sites/meal/../meal /src/views.pyin new_photo 
 532. print form.reservation 
 
异常类型：/ photo / new / 
中的AttributeError异常值：'PhotoForm'对象没有属性预留
  
 
 
解决方案
 .FILES的形式。 
  @login_required 
 def new_photo（request，template_name =photo / newphoto.html）：
 
 form = PhotoForm（user = request.user，data = request.POST，files = request.FILES）
 
如果request.method =='POST'：
表单。摄影师= request.user 
如果form.is_valid（）：
 photo = form.save（commit = False）
 photo.photographer = request.user 
 photo.save（） 
 return HttpResponseRedirect（'/ photo /％d /'％photo.id）
  
 
This view is throwing the AttributeError saying :'PhotoForm' object has no attribute 'reservation'. What happens- the function passes, but doesn't actually upload the image. In debugging it, the form is not valid. 


I tried printing


form.reservation
form.message
form.photo 


But that shows this traceback ( which is the reason why the form isn't valid & not completing the function.

As I built this off other functions that are working, I'm a bit confused. Thanks for the help!

The HTML Form
<form action="/photo/new/" method="post">{% csrf_token %}
    <dl>
        <dt>{{ form.reservation.label }}</dt>
            <dd><select name="reservation"> {% for reservation in reservations %} <option value="{{reservation.id}}">{{reservation.date}} {{reservation.chef.cook.get_profile.firstname}} - {{reservation.guest.get_profile.firstname}}</option>{% endfor %}</select></dd>
        <dt>{{ form.photo.label }}</dt>
            <dd>{{ form.photo }}</dd>
        <dt> {{ form.message.label }}</dt>
            <dd>{{ form.message }}</dd>
    </dl>
<button type="submit">Submit</button>
</form>
The View
@login_required
def new_photo(request, template_name="photo/newphoto.html"):

  meals = Reservation.objects.filter(guest=request.user.id)
  form = PhotoForm(request.POST)
  form.data = { "reservations": meals }
  if request.method == 'POST':
    form.photographer = request.user
    form.data.get('reservation')
    print form.reservation
    print form.message
    print form.photo
    if form.is_valid():
      print" hellos"
      save_reservation_photo(request.FILES["photo"])
      photo = form.save(commit=False)
      photo.photographer = request.user
      photo.save()
      return HttpResponseRedirect('/photo/%d/' % photo.id )
  else:
    form = PhotoForm()

  data = {'form':form,'reservations':meals,
    'add':True
  }

  return render_to_response(template_name,
                            data,
                            context_instance=RequestContext(request))
The Form:
class PhotoForm(forms.ModelForm):
  class Meta:
    model = Photo
    fields = ('reservation','photo','message')

  def __init__(self, *args, **kwargs):
      super(PhotoForm, self).__init__(*args, **kwargs)
The Model:
class Photo(models.Model):

  photographer = models.ForeignKey(User)
  pub_date = models.DateTimeField(default=datetime.now,auto_now_add=True,db_index=True)
  reservation = models.ForeignKey(Reservation)

  message = models.CharField(default='',max_length=140)

  photo = models.ImageField(default='',upload_to="reservation_images/")
The traceback
Traceback:
Environment:

Request Method: POST
Request URL: http://127.0.0.1:8000/photo/new/
Django Version: 1.2.3
Python Version: 2.7.0
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.comments',
 'django.contrib.markup',
 'django.contrib.sitemaps',
 'lib.debug_toolbar',
 'src',
 'django.contrib.admin']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'lib.debug_toolbar.middleware.DebugToolbarMiddleware')


Traceback:

Environment:

Request Method: POST
Request URL: http://127.0.0.1:8000/photo/new/
Django Version: 1.2.3
Python Version: 2.7.0
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.comments',
 'django.contrib.markup',
 'django.contrib.sitemaps',
 'lib.debug_toolbar',
 'src',
 'django.contrib.admin']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'lib.debug_toolbar.middleware.DebugToolbarMiddleware')


Traceback:
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  100.                     response = callback(request, *callback_args, **callback_kwargs)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
  25.                 return view_func(request, *args, **kwargs)
File "/Users/emilepetrone/Sites/meal/../meal/src/views.py" in new_photo
  532.     print form.reservation

Exception Type: AttributeError at /photo/new/
Exception Value: 'PhotoForm' object has no attribute 'reservation'

解决方案
The key was having files=request.FILES in the form. 
@login_required
def new_photo(request, template_name="photo/newphoto.html"):

  form = PhotoForm( user= request.user, data=request.POST, files=request.FILES)

  if request.method == 'POST':
    form.photographer = request.user
    if form.is_valid():
      photo = form.save(commit=False)
      photo.photographer = request.user
      photo.save()
      return HttpResponseRedirect('/photo/%d/' % photo.id )


                        
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