Django Formset management-form validation error

python django django-templates django-forms

10,587

Solution 1

To avoid this error just wrap your formset POST bounding in a try/except block like so.

from django.core.exceptions import ValidationError # add this to your imports

if request.method == 'POST':
   try:
      delblogformset = delblog(request.POST)
   except ValidationError:
      delblogformset = None
   if delblogformset and delblogformset.is_valid():
      delblogformset.save()
          return HttpResponseRedirect('/home')

The POST request from your blogform lacks the 'ManagementForm' hidden input that is required for your delblogformset and hence the validation error is thrown. We wrap in a try/except block because we know that if ValidationError has been raised than the POST was meant for your blogform and not delblogformset.

For more information see django docs: http://docs.djangoproject.com/en/dev/topics/forms/formsets/#understanding-the-managementform

Solution 2

I have figured this out after running into the same error. In situations where you are using a form and a formset in the same view and template, the form should be processed before the formset to avoid raising a formset validation error.

of importance Also, if request.method == 'POST': SHOULD ONLY be used on the formset. So the above will appear as below in the view:

@login_required
def home(request):

    user = UserProfile.objects.get(pk=request.session['_auth_user_id'])
    blogz = list(blog.objects.filter(deleted='0'))
    delblog = modelformset_factory(blog, exclude=('poster','date' ,'title','content')) 
    if request.user.is_staff== True:
        staff = 1
    else:
        staff = 0
    staffis = 1

    blogform = BlogForm(request.POST)
    if blogform.is_valid():
        blogform.save()
        return HttpResponseRedirect('/home')

   else:
    blogform = BlogForm(initial = {'poster':user.id})

    if request.method == 'POST':
    delblogformset = delblog(request.POST)
    if delblogformset.is_valid():
        delblogformset.save()
        return HttpResponseRedirect('/home')

    else:
        delblogformset = delblog(queryset=blog.objects.filter( deleted='0'))



    blogs= zip(blogz,delblogformset.forms)  

    paginator = Paginator(blogs, 10) # Show 25 contacts per page

    # Make sure page request is an int. If not, deliver first page.
    try:
        page = int(request.GET.get('page', '1'))
    except ValueError:
        page = 1

    # If page request (9999) is out of range, deliver last page of results.
    try:
        blogs = paginator.page(page)
    except (EmptyPage, InvalidPage):
        blogs = paginator.page(paginator.num_pages)

    return render_to_response('home.html', {'user':user, 'blogform':blogform, 'staff': staff, 'staffis': staffis, 'blog':blogs, 'delblog':delblogformset}, context_instance = RequestContext( request ))

10,587

Author by

Dennis Kioko

Updated on July 20, 2022

Comments

Dennis Kioko almost 2 years

I have a form and a formset on my template. The problem is that the formset is throwing validation error claiming that the management form is "missing or has been tampered with".

Here is my view

@login_required
def home(request):

    user = UserProfile.objects.get(pk=request.session['_auth_user_id'])
    blogz = list(blog.objects.filter(deleted='0'))
    delblog = modelformset_factory(blog, exclude=('poster','date' ,'title','content')) 
    if request.user.is_staff== True:
        staff = 1
    else:
        staff = 0
    staffis = 1

    if request.method == 'POST':
        delblogformset = delblog(request.POST)
        if delblogformset.is_valid():
        delblogformset.save()
            return HttpResponseRedirect('/home')

    else:
        delblogformset = delblog(queryset=blog.objects.filter( deleted='0'))


        blogform = BlogForm(request.POST)
        if blogform.is_valid():
            blogform.save()
        return HttpResponseRedirect('/home')

    else:
        blogform = BlogForm(initial = {'poster':user.id})
    blogs= zip(blogz,delblogformset.forms)  

    paginator = Paginator(blogs, 10) # Show 25 contacts per page

    # Make sure page request is an int. If not, deliver first page.
    try:
        page = int(request.GET.get('page', '1'))
    except ValueError:
        page = 1

    # If page request (9999) is out of range, deliver last page of results.
    try:
        blogs = paginator.page(page)
    except (EmptyPage, InvalidPage):
        blogs = paginator.page(paginator.num_pages)

    return render_to_response('home.html', {'user':user, 'blogform':blogform, 'staff': staff, 'staffis': staffis, 'blog':blogs, 'delblog':delblogformset}, context_instance = RequestContext( request ))

my template

{%block content%}


<h2>Home</h2>

 {% ifequal staff staffis %}
 {% if form.errors %}
  <ul>
        {% for field in form %}
          <H3 class="title">
          <p class="error"> {% if field.errors %}<li>{{ field.errors|striptags }}</li>{% endif %}</p>
          </H3>
        {% endfor %}
    </ul>
  {% endif %}


   <h3>Post a Blog to the Front Page</h3>
 <form method="post" id="form2" action=""  class="infotabs accfrm">
    {{ blogform.as_p }}
   <input type="submit" value="Submit" />
 </form> 
 <br>
 <br>
{% endifequal %}


 <div class="pagination">
    <span class="step-links">
        {% if blog.has_previous %}
            <a href="?page={{ blog.previous_page_number }}">previous</a>
        {% endif %}

        <span class="current">
            Page {{ blog.number }} of {{ blog.paginator.num_pages }}.
        </span>

        {% if blog.has_next %}
            <a href="?page={{ blog.next_page_number }}">next</a>
        {% endif %}
    </span>


<form method="post"  action=""  class="usertabs accfrm">
{{delblog.management_form}}
{% for b, form in blog.object_list %}
<div class="blog">
<h3>{{b.title}}</h3>
<p>{{b.content}}</p>
<p>posted by <strong>{{b.poster}}</strong> on {{b.date}}</p>
 {% ifequal staff staffis %}<p>{{form.as_p}}<input type="submit" value="Delete" /></p>{% endifequal %}
</div>
{% endfor %}
 </form>




{%endblock%}

Here is the Traceback

ValidationError at /home/

Request Method:     POST
Request URL:    http://localhost:8000/home/
Exception Type:     ValidationError
Exception Value:    

Exception Location:     /usr/lib/python2.6/site-packages/django/forms/formsets.py in _management_form, line 54
Python Executable:  /usr/bin/python
Python Version:     2.6.2
Python Path:    ['/home/projects/acms', '/usr/lib/python2.6/site-packages/django_socialregistration-0.2-py2.6.egg', '/usr/lib/python26.zip', '/usr/lib/python2.6', '/usr/lib/python2.6/plat-linux2', '/usr/lib/python2.6/lib-tk', '/usr/lib/python2.6/lib-old', '/usr/lib/python2.6/lib-dynload', '/usr/lib/python2.6/site-packages', '/usr/lib/python2.6/site-packages/Numeric', '/usr/lib/python2.6/site-packages/PIL', '/usr/lib/python2.6/site-packages/gst-0.10', '/usr/lib/python2.6/site-packages/gtk-2.0', '/usr/lib/python2.6/site-packages/webkit-1.0']
Server time:    Mon, 29 Mar 2010 12:02:43 +0300
 Traceback Switch to copy-and-paste view

* /usr/lib/python2.6/site-packages/django/core/handlers/base.py in get_response
    85. # Apply view middleware
    86. for middleware_method in self._view_middleware:
    87. response = middleware_method(request, callback, callback_args, callback_kwargs)
    88. if response:
    89. return response
    90.
    91. try:
    92. response = callback(request, *callback_args, **callback_kwargs) ...
    93. except Exception, e:
    94. # If the view raised an exception, run it through exception
    95. # middleware, and if the exception middleware returns a
    96. # response, use that. Otherwise, reraise the exception.
    97. for middleware_method in self._exception_middleware:
    98. response = middleware_method(request, e)
  ▶ Local vars
  Variable  Value
  callback  
  <django.contrib.auth.decorators._CheckLogin object at 0xb655ad2c>
  callback_args     
  ()
  callback_kwargs   
  {}
  e     
  ValidationError()
  exc_info  
  (<class 'django.forms.util.ValidationError'>, ValidationError(), <traceback object at 0xb6630a2c>)
  exceptions    
  <module 'django.core.exceptions' from '/usr/lib/python2.6/site-packages/django/core/exceptions.pyc'>
  middleware_method     
  <bound method TransactionMiddleware.process_exception of <django.middleware.transaction.TransactionMiddleware object at 0xb676ff6c>>
  receivers     
  [(<function _rollback_on_exception at 0x8c845dc>, None)]
  request   
  <WSGIRequest GET:<QueryDict: {}>, POST:<QueryDict: {u'content': [u'test'], u'poster': [u'4'], u'title': [u'test']}>, COOKIES:{'sessionid': '8f4b4fa8411cc5baa05c2016a8ad00f4'}, META:{'COLORTERM': 'gnome-terminal', 'CONTENT_LENGTH': '32', 'CONTENT_TYPE': 'application/x-www-form-urlencoded', 'CVS_RSH': 'ssh', 'DBUS_SESSION_BUS_ADDRESS': 'unix:abstract=/tmp/dbus-nKl1u8UWGs,guid=fabac1ba0d651ceae76e1d9a4bafa535', 'DESKTOP_SESSION': 'gnome', 'DISPLAY': ':0.0', 'DJANGO_SETTINGS_MODULE': 'acms.settings', 'GATEWAY_INTERFACE': 'CGI/1.1', 'GDMSESSION': 'gnome', 'GDM_KEYBOARD_LAYOUT': 'us', 'GDM_LANG': 'en_GB.UTF-8', 'GNOME_DESKTOP_SESSION_ID': 'this-is-deprecated', 'GNOME_KEYRING_PID': '1511', 'GNOME_KEYRING_SOCKET': '/tmp/keyring-uvdktc/socket', 'GTK_RC_FILES': '/etc/gtk/gtkrc:/home/user/.gtkrc-1.2-gnome2', 'G_BROKEN_FILENAMES': '1', 'HISTCONTROL': 'ignoreboth', 'HISTSIZE': '1000', 'HOME': '/home/user', 'HOSTNAME': 'desktop.theblackout', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'HTTP_ACCEPT_CHARSET': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7', 'HTTP_ACCEPT_ENCODING': 'gzip,deflate', 'HTTP_ACCEPT_LANGUAGE': 'en-us,en;q=0.5', 'HTTP_CONNECTION': 'keep-alive', 'HTTP_COOKIE': 'sessionid=8f4b4fa8411cc5baa05c2016a8ad00f4', 'HTTP_HOST': 'localhost:8000', 'HTTP_KEEP_ALIVE': '115', 'HTTP_REFERER': 'http://localhost:8000/home/', 'HTTP_USER_AGENT': 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2) Gecko/20100218 Fedora/3.6.1-1.fc13 Firefox/3.6', 'IMSETTINGS_INTEGRATE_DESKTOP': 'yes', 'IMSETTINGS_MODULE': 'none', 'KDEDIRS': '/usr', 'KDE_IS_PRELINKED': '1', 'KMIX_PULSEAUDIO_DISABLE': '1', 'LANG': 'en_GB.UTF-8', 'LESSOPEN': '|/usr/bin/lesspipe.sh %s', 'LOGNAME': 'user', 'LS_COLORS': 'rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=01;05;37;41:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lz=01;31:*.xz=01;31:*.bz2=01;31:*.tbz=01;31:*.tbz2=01;31:*.bz=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=01;36:*.au=01;36:*.flac=01;36:*.mid=01;36:*.midi=01;36:*.mka=01;36:*.mp3=01;36:*.mpc=01;36:*.ogg=01;36:*.ra=01;36:*.wav=01;36:*.axa=01;36:*.oga=01;36:*.spx=01;36:*.xspf=01;36:', 'MAIL': '/var/spool/mail/user', 'OLDPWD': '/home/user', 'ORBIT_SOCKETDIR': '/tmp/orbit-user', 'PATH': '/usr/lib/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/lib/ccache:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/opt/real/RealPlayer:/home/user/bin:/opt/real/RealPlayer', 'PATH_INFO': u'/home/', 'PWD': '/home/projects/acms', 'QTDIR': '/usr/lib/qt-3.3', 'QTINC': '/usr/lib/qt-3.3/include', 'QTLIB': '/usr/lib/qt-3.3/lib', 'QT_IM_MODULE': 'xim', 'QUERY_STRING': '', 'REMOTE_ADDR': '127.0.0.1', 'REMOTE_HOST': '', 'REQUEST_METHOD': 'POST', 'RUN_MAIN': 'true', 'SCRIPT_NAME': u'', 'SERVER_NAME': 'localhost.localdomain', 'SERVER_PORT': '8000', 'SERVER_PROTOCOL': 'HTTP/1.1', 'SERVER_SOFTWARE': 'WSGIServer/0.1 Python/2.6.2', 'SESSION_MANAGER': 'local/unix:@/tmp/.ICE-unix/1518,unix/unix:/tmp/.ICE-unix/1518', 'SHELL': '/bin/bash', 'SHLVL': '2', 'SSH_ASKPASS': '/usr/libexec/openssh/gnome-ssh-askpass', 'SSH_AUTH_SOCK': '/tmp/keyring-uvdktc/socket.ssh', 'TERM': 'xterm', 'TZ': 'Africa/Nairobi', 'USER': 'user', 'USERNAME': 'user', 'WINDOWID': '79691779', 'XAUTHORITY': '/var/run/gdm/auth-for-user-YHprr5/database', 'XDG_SESSION_COOKIE': 'b52f8ef12c1cf7be85729e5e4ae08729-1269802292.411279-1821712829', 'XMODIFIERS': '@im=none', '_': '/usr/bin/python', 'wsgi.errors': <open file '<stderr>', mode 'w' at 0xb76b70c0>, 'wsgi.file_wrapper': <class 'django.core.servers.basehttp.FileWrapper'>, 'wsgi.input': <socket._fileobject object at 0xb675f8b4>, 'wsgi.multiprocess': False, 'wsgi.multithread': True, 'wsgi.run_once': False, 'wsgi.url_scheme': 'http', 'wsgi.version': (1, 0)}>
  resolver  
  <RegexURLResolver acms.urls (None:None) ^/>
  response  
  None
  self  
  <django.core.handlers.wsgi.WSGIHandler object at 0xb6755acc>
  settings  
  <django.conf.LazySettings object at 0xb740856c>
  urlconf   
  'acms.urls'
  urlresolvers  
  <module 'django.core.urlresolvers' from '/usr/lib/python2.6/site-packages/django/core/urlresolvers.pyc'>
* /usr/lib/python2.6/site-packages/django/contrib/auth/decorators.py in __call__
    71.
    72. def __get__(self, obj, cls=None):
    73. view_func = self.view_func.__get__(obj, cls)
    74. return _CheckLogin(view_func, self.test_func, self.login_url, self.redirect_field_name)
    75.
    76. def __call__(self, request, *args, **kwargs):
    77. if self.test_func(request.user):
    78. return self.view_func(request, *args, **kwargs) ...
    79. path = urlquote(request.get_full_path())
    80. tup = self.login_url, self.redirect_field_name, path
    81. return HttpResponseRedirect('%s?%s=%s' % tup)
  ▶ Local vars
  Variable  Value
  args  
  ()
  kwargs    
  {}
  request   
  <WSGIRequest GET:<QueryDict: {}>, POST:<QueryDict: {u'content': [u'test'], u'poster': [u'4'], u'title': [u'test']}>, COOKIES:{'sessionid': '8f4b4fa8411cc5baa05c2016a8ad00f4'}, META:{'COLORTERM': 'gnome-terminal', 'CONTENT_LENGTH': '32', 'CONTENT_TYPE': 'application/x-www-form-urlencoded', 'CVS_RSH': 'ssh', 'DBUS_SESSION_BUS_ADDRESS': 'unix:abstract=/tmp/dbus-nKl1u8UWGs,guid=fabac1ba0d651ceae76e1d9a4bafa535', 'DESKTOP_SESSION': 'gnome', 'DISPLAY': ':0.0', 'DJANGO_SETTINGS_MODULE': 'acms.settings', 'GATEWAY_INTERFACE': 'CGI/1.1', 'GDMSESSION': 'gnome', 'GDM_KEYBOARD_LAYOUT': 'us', 'GDM_LANG': 'en_GB.UTF-8', 'GNOME_DESKTOP_SESSION_ID': 'this-is-deprecated', 'GNOME_KEYRING_PID': '1511', 'GNOME_KEYRING_SOCKET': '/tmp/keyring-uvdktc/socket', 'GTK_RC_FILES': '/etc/gtk/gtkrc:/home/user/.gtkrc-1.2-gnome2', 'G_BROKEN_FILENAMES': '1', 'HISTCONTROL': 'ignoreboth', 'HISTSIZE': '1000', 'HOME': '/home/user', 'HOSTNAME': 'desktop.theblackout', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'HTTP_ACCEPT_CHARSET': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7', 'HTTP_ACCEPT_ENCODING': 'gzip,deflate', 'HTTP_ACCEPT_LANGUAGE': 'en-us,en;q=0.5', 'HTTP_CONNECTION': 'keep-alive', 'HTTP_COOKIE': 'sessionid=8f4b4fa8411cc5baa05c2016a8ad00f4', 'HTTP_HOST': 'localhost:8000', 'HTTP_KEEP_ALIVE': '115', 'HTTP_REFERER': 'http://localhost:8000/home/', 'HTTP_USER_AGENT': 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2) Gecko/20100218 Fedora/3.6.1-1.fc13 Firefox/3.6', 'IMSETTINGS_INTEGRATE_DESKTOP': 'yes', 'IMSETTINGS_MODULE': 'none', 'KDEDIRS': '/usr', 'KDE_IS_PRELINKED': '1', 'KMIX_PULSEAUDIO_DISABLE': '1', 'LANG': 'en_GB.UTF-8', 'LESSOPEN': '|/usr/bin/lesspipe.sh %s', 'LOGNAME': 'user', 'LS_COLORS': 'rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=01;05;37;41:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lz=01;31:*.xz=01;31:*.bz2=01;31:*.tbz=01;31:*.tbz2=01;31:*.bz=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=01;36:*.au=01;36:*.flac=01;36:*.mid=01;36:*.midi=01;36:*.mka=01;36:*.mp3=01;36:*.mpc=01;36:*.ogg=01;36:*.ra=01;36:*.wav=01;36:*.axa=01;36:*.oga=01;36:*.spx=01;36:*.xspf=01;36:', 'MAIL': '/var/spool/mail/user', 'OLDPWD': '/home/user', 'ORBIT_SOCKETDIR': '/tmp/orbit-user', 'PATH': '/usr/lib/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/lib/ccache:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/opt/real/RealPlayer:/home/user/bin:/opt/real/RealPlayer', 'PATH_INFO': u'/home/', 'PWD': '/home/projects/acms', 'QTDIR': '/usr/lib/qt-3.3', 'QTINC': '/usr/lib/qt-3.3/include', 'QTLIB': '/usr/lib/qt-3.3/lib', 'QT_IM_MODULE': 'xim', 'QUERY_STRING': '', 'REMOTE_ADDR': '127.0.0.1', 'REMOTE_HOST': '', 'REQUEST_METHOD': 'POST', 'RUN_MAIN': 'true', 'SCRIPT_NAME': u'', 'SERVER_NAME': 'localhost.localdomain', 'SERVER_PORT': '8000', 'SERVER_PROTOCOL': 'HTTP/1.1', 'SERVER_SOFTWARE': 'WSGIServer/0.1 Python/2.6.2', 'SESSION_MANAGER': 'local/unix:@/tmp/.ICE-unix/1518,unix/unix:/tmp/.ICE-unix/1518', 'SHELL': '/bin/bash', 'SHLVL': '2', 'SSH_ASKPASS': '/usr/libexec/openssh/gnome-ssh-askpass', 'SSH_AUTH_SOCK': '/tmp/keyring-uvdktc/socket.ssh', 'TERM': 'xterm', 'TZ': 'Africa/Nairobi', 'USER': 'user', 'USERNAME': 'user', 'WINDOWID': '79691779', 'XAUTHORITY': '/var/run/gdm/auth-for-user-YHprr5/database', 'XDG_SESSION_COOKIE': 'b52f8ef12c1cf7be85729e5e4ae08729-1269802292.411279-1821712829', 'XMODIFIERS': '@im=none', '_': '/usr/bin/python', 'wsgi.errors': <open file '<stderr>', mode 'w' at 0xb76b70c0>, 'wsgi.file_wrapper': <class 'django.core.servers.basehttp.FileWrapper'>, 'wsgi.input': <socket._fileobject object at 0xb675f8b4>, 'wsgi.multiprocess': False, 'wsgi.multithread': True, 'wsgi.run_once': False, 'wsgi.url_scheme': 'http', 'wsgi.version': (1, 0)}>
  self  
  <django.contrib.auth.decorators._CheckLogin object at 0xb655ad2c>
* /home/projects/acms/../acms/cms/views.py in home
    45. if request.user.is_staff== True:
    46. staff = 1
    47. else:
    48. staff = 0
    49. staffis = 1
    50.
    51. if request.method == 'POST':
    52. delblogformset = delblog(request.POST) ...
    53. if delblogformset.is_valid():
    54. delblogformset.save()
    55. return HttpResponseRedirect('/home')
    56.
    57. else:
    58. delblogformset = delblog(queryset=blog.objects.filter( deleted='0'))
  ▶ Local vars
  Variable  Value
  blogz     
  Error in formatting: %d format: a number is required, not unicode
  delblog   
  <class 'django.forms.formsets.blogFormFormSet'>
  request   
  <WSGIRequest GET:<QueryDict: {}>, POST:<QueryDict: {u'content': [u'test'], u'poster': [u'4'], u'title': [u'test']}>, COOKIES:{'sessionid': '8f4b4fa8411cc5baa05c2016a8ad00f4'}, META:{'COLORTERM': 'gnome-terminal', 'CONTENT_LENGTH': '32', 'CONTENT_TYPE': 'application/x-www-form-urlencoded', 'CVS_RSH': 'ssh', 'DBUS_SESSION_BUS_ADDRESS': 'unix:abstract=/tmp/dbus-nKl1u8UWGs,guid=fabac1ba0d651ceae76e1d9a4bafa535', 'DESKTOP_SESSION': 'gnome', 'DISPLAY': ':0.0', 'DJANGO_SETTINGS_MODULE': 'acms.settings', 'GATEWAY_INTERFACE': 'CGI/1.1', 'GDMSESSION': 'gnome', 'GDM_KEYBOARD_LAYOUT': 'us', 'GDM_LANG': 'en_GB.UTF-8', 'GNOME_DESKTOP_SESSION_ID': 'this-is-deprecated', 'GNOME_KEYRING_PID': '1511', 'GNOME_KEYRING_SOCKET': '/tmp/keyring-uvdktc/socket', 'GTK_RC_FILES': '/etc/gtk/gtkrc:/home/user/.gtkrc-1.2-gnome2', 'G_BROKEN_FILENAMES': '1', 'HISTCONTROL': 'ignoreboth', 'HISTSIZE': '1000', 'HOME': '/home/user', 'HOSTNAME': 'desktop.theblackout', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'HTTP_ACCEPT_CHARSET': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7', 'HTTP_ACCEPT_ENCODING': 'gzip,deflate', 'HTTP_ACCEPT_LANGUAGE': 'en-us,en;q=0.5', 'HTTP_CONNECTION': 'keep-alive', 'HTTP_COOKIE': 'sessionid=8f4b4fa8411cc5baa05c2016a8ad00f4', 'HTTP_HOST': 'localhost:8000', 'HTTP_KEEP_ALIVE': '115', 'HTTP_REFERER': 'http://localhost:8000/home/', 'HTTP_USER_AGENT': 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2) Gecko/20100218 Fedora/3.6.1-1.fc13 Firefox/3.6', 'IMSETTINGS_INTEGRATE_DESKTOP': 'yes', 'IMSETTINGS_MODULE': 'none', 'KDEDIRS': '/usr', 'KDE_IS_PRELINKED': '1', 'KMIX_PULSEAUDIO_DISABLE': '1', 'LANG': 'en_GB.UTF-8', 'LESSOPEN': '|/usr/bin/lesspipe.sh %s', 'LOGNAME': 'user', 'LS_COLORS': 'rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=01;05;37;41:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lz=01;31:*.xz=01;31:*.bz2=01;31:*.tbz=01;31:*.tbz2=01;31:*.bz=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=01;36:*.au=01;36:*.flac=01;36:*.mid=01;36:*.midi=01;36:*.mka=01;36:*.mp3=01;36:*.mpc=01;36:*.ogg=01;36:*.ra=01;36:*.wav=01;36:*.axa=01;36:*.oga=01;36:*.spx=01;36:*.xspf=01;36:', 'MAIL': '/var/spool/mail/user', 'OLDPWD': '/home/user', 'ORBIT_SOCKETDIR': '/tmp/orbit-user', 'PATH': '/usr/lib/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/lib/ccache:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/opt/real/RealPlayer:/home/user/bin:/opt/real/RealPlayer', 'PATH_INFO': u'/home/', 'PWD': '/home/projects/acms', 'QTDIR': '/usr/lib/qt-3.3', 'QTINC': '/usr/lib/qt-3.3/include', 'QTLIB': '/usr/lib/qt-3.3/lib', 'QT_IM_MODULE': 'xim', 'QUERY_STRING': '', 'REMOTE_ADDR': '127.0.0.1', 'REMOTE_HOST': '', 'REQUEST_METHOD': 'POST', 'RUN_MAIN': 'true', 'SCRIPT_NAME': u'', 'SERVER_NAME': 'localhost.localdomain', 'SERVER_PORT': '8000', 'SERVER_PROTOCOL': 'HTTP/1.1', 'SERVER_SOFTWARE': 'WSGIServer/0.1 Python/2.6.2', 'SESSION_MANAGER': 'local/unix:@/tmp/.ICE-unix/1518,unix/unix:/tmp/.ICE-unix/1518', 'SHELL': '/bin/bash', 'SHLVL': '2', 'SSH_ASKPASS': '/usr/libexec/openssh/gnome-ssh-askpass', 'SSH_AUTH_SOCK': '/tmp/keyring-uvdktc/socket.ssh', 'TERM': 'xterm', 'TZ': 'Africa/Nairobi', 'USER': 'user', 'USERNAME': 'user', 'WINDOWID': '79691779', 'XAUTHORITY': '/var/run/gdm/auth-for-user-YHprr5/database', 'XDG_SESSION_COOKIE': 'b52f8ef12c1cf7be85729e5e4ae08729-1269802292.411279-1821712829', 'XMODIFIERS': '@im=none', '_': '/usr/bin/python', 'wsgi.errors': <open file '<stderr>', mode 'w' at 0xb76b70c0>, 'wsgi.file_wrapper': <class 'django.core.servers.basehttp.FileWrapper'>, 'wsgi.input': <socket._fileobject object at 0xb675f8b4>, 'wsgi.multiprocess': False, 'wsgi.multithread': True, 'wsgi.run_once': False, 'wsgi.url_scheme': 'http', 'wsgi.version': (1, 0)}>
  staff     
  1
  staffis   
  1
  user  
  <UserProfile: Treasurer>
* /usr/lib/python2.6/site-packages/django/forms/models.py in __init__
   452. model = None
   453.
   454. def __init__(self, data=None, files=None, auto_id='id_%s', prefix=None,
   455. queryset=None, **kwargs):
   456. self.queryset = queryset
   457. defaults = {'data': data, 'files': files, 'auto_id': auto_id, 'prefix': prefix}
   458. defaults.update(kwargs)
   459. super(BaseModelFormSet, self).__init__(**defaults) ...
   460.
   461. def initial_form_count(self):
   462. """Returns the number of forms that are required in this FormSet."""
   463. if not (self.data or self.files):
   464. return len(self.get_queryset())
   465. return super(BaseModelFormSet, self).initial_form_count()
  ▶ Local vars
  Variable  Value
  auto_id   
  'id_%s'
  data  
  <QueryDict: {u'content': [u'test'], u'poster': [u'4'], u'title': [u'test']}>
  defaults  
  {'auto_id': 'id_%s', 'data': <QueryDict: {u'content': [u'test'], u'poster': [u'4'], u'title': [u'test']}>, 'files': None, 'prefix': None}
  files     
  None
  kwargs    
  {}
  prefix    
  None
  queryset  
  None
  self  
  <django.forms.formsets.blogFormFormSet object at 0xb659bdec>
* /usr/lib/python2.6/site-packages/django/forms/formsets.py in __init__
    37. self.data = data
    38. self.files = files
    39. self.initial = initial
    40. self.error_class = error_class
    41. self._errors = None
    42. self._non_form_errors = None
    43. # construct the forms in the formset
    44. self._construct_forms() ...
    45.
    46. def __unicode__(self):
    47. return self.as_table()
    48.
    49. def _management_form(self):
    50. """Returns the ManagementForm instance for this FormSet."""
  ▶ Local vars
  Variable  Value
  auto_id   
  'id_%s'
  data  
  <QueryDict: {u'content': [u'test'], u'poster': [u'4'], u'title': [u'test']}>
  error_class   
  <class 'django.forms.util.ErrorList'>
  files     
  None
  initial   
  None
  prefix    
  None
  self  
  <django.forms.formsets.blogFormFormSet object at 0xb659bdec>
* /usr/lib/python2.6/site-packages/django/forms/formsets.py in _construct_forms
    80. if initial_forms > self.max_num > 0:
    81. initial_forms = self.max_num
    82. return initial_forms
    83.
    84. def _construct_forms(self):
    85. # instantiate all the forms and put them in self.forms
    86. self.forms = []
    87. for i in xrange(self.total_form_count()): ...
    88. self.forms.append(self._construct_form(i))
    89.
    90. def _construct_form(self, i, **kwargs):
    91. """
    92. Instantiates and returns the i-th form instance in a formset.
    93. """
  ▶ Local vars
  Variable  Value
  self  
  <django.forms.formsets.blogFormFormSet object at 0xb659bdec>
* /usr/lib/python2.6/site-packages/django/forms/formsets.py in total_form_count
    59. })
    60. return form
    61. management_form = property(_management_form)
    62.
    63. def total_form_count(self):
    64. """Returns the total number of forms in this FormSet."""
    65. if self.data or self.files:
    66. return self.management_form.cleaned_data[TOTAL_FORM_COUNT] ...
    67. else:
    68. total_forms = self.initial_form_count() + self.extra
    69. if total_forms > self.max_num > 0:
    70. total_forms = self.max_num
    71. return total_forms
  72.
      ▶ Local vars
  Variable  Value
  self  
  <django.forms.formsets.blogFormFormSet object at 0xb659bdec>
* /usr/lib/python2.6/site-packages/django/forms/formsets.py in _management_form
    47. return self.as_table()
    48.
    49. def _management_form(self):
    50. """Returns the ManagementForm instance for this FormSet."""
    51. if self.data or self.files:
    52. form = ManagementForm(self.data, auto_id=self.auto_id, prefix=self.prefix)
    53. if not form.is_valid():
    54. raise ValidationError('ManagementForm data is missing or has been tampered with') ...
    55. else:
    56. form = ManagementForm(auto_id=self.auto_id, prefix=self.prefix, initial={
    57. TOTAL_FORM_COUNT: self.total_form_count(),
    58. INITIAL_FORM_COUNT: self.initial_form_count()
    59. })
    60. return form
  ▶ Local vars

akaihola about 14 years

If I read the mixed up indentation correctly, changes to the formset delblogformset are only saved when the blogform form is invalid. If it's valid instead, the user is redirected back and all changes to the formset are lost. Also, could you explain why it is important to handle the form before the formset? Is this the same problem as described in groups.google.com/group/django-users/browse_thread/thread/… ?
Dennis Kioko about 14 years

i think i sorted out the indentation now, and yeah, its the same error.
Asotos about 9 years

This answer has been very helpful. In my case however the problem seemed to be that I didn't render the ManagementForm data in the template (by including something like {{ my_formset.management_form }}).