Re: Foreign key dependent model's data not getting saved !

[Karen Tracey]

On Sat, Jun 25, 2011 at 1:42 PM, CareerDhaba tech wrote:

> Hey,
>
> Thanks Karen for the reply. I have been trying many things on this form and
> trying to save both the models data using one form in a single instance. I
> did try the commit=False method too but it gave an error which i couldnt
> figure out. Everytime i try doing something new an unknown error/exception
> pops up that too in some random file and location :(.
>
>
No, really, code does not behave this way. Errors do not pop up randomly in
random locations. You need to learn how to interpret the debug information
the system is providing you.


> This is the traceback which i got now after changing code
>
> Environment:
>
>
> Request Method: POST
> Request URL: http://127.0.0.1:8000/cd/registration/register/
>
> Django Version: 1.3
> [snip]
> Traceback:
> File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in
> get_response
>   111. response = callback(request, *callback_args,
> **callback_kwargs)
> File "C:\Users\pradeep\Desktop\cd\registration\views.py" in register
>   23. return direct_to_template('success.html',{})
> File "C:\Python27\lib\site-packages\django\views\generic\simple.py" in
> direct_to_template
>   26. c = RequestContext(request, dictionary)
> File "C:\Python27\lib\site-packages\django\template\context.py" in __init__
>   177. self.update(processor(request))
> File "C:\Python27\lib\site-packages\django\core\context_processors.py" in
> debug
>   53. if settings.DEBUG and request.META.get('REMOTE_ADDR') in
> settings.INTERNAL_IPS:
>
> Exception Type: AttributeError at /cd/registration/register/
> Exception Value: 'str' object has no attribute 'META'
>
>
While the ultimate error here appears to be in Django code, line 23 of your
views.py file is higher up in the traceback, and that is the line causing
the problem. You are not passing the correct parameters to
direct_to_template. I'm not going to lay out what the correct parameters
should be (you could work that out for yourself by reading the docs),
because you shouldn't really be using direct_to_template there.

The common pattern for processing forms in a view is laid out here:

https://docs.djangoproject.com/en/1.3/topics/forms/#using-a-form-in-a-view

(Looking at that example I notice it should be updated to use render, not
render_to_response, but the overall pattern for the view is still correct.
Note that in the case of successful POST processing, the code in that view
returns a redirect, not a regular response. This is a general web
application pattern, not specific to Django, you can read about the reasons
for it here for example: http://en.wikipedia.org/wiki/Post/Redirect/Get )

Besides not redirecting after a successful completion, you are using two
different templates for different flows through your view, which is also
probably not what you want. You are using register.html for the initial get
of the page, and regcheck1.html for the case where the posted forms don't
validate successfully. In general you should be using the same template for
these cases.

Karen
-- 
http://tracey.org/kmt/

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Re: Foreign key dependent model's data not getting saved !

[CareerDhaba tech]

Hey,

Thanks Karen for the reply. I have been trying many things on this form and
trying to save both the models data using one form in a single instance. I
did try the commit=False method too but it gave an error which i couldnt
figure out. Everytime i try doing something new an unknown error/exception
pops up that too in some random file and location :(.

This is the traceback which i got now after changing code

Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/cd/registration/register/

Django Version: 1.3
Python Version: 2.7.1
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'registration']
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',
 'django.middleware.csrf.CsrfResponseMiddleware')


Traceback:
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in
get_response
  111. response = callback(request, *callback_args,
**callback_kwargs)
File "C:\Users\pradeep\Desktop\cd\registration\views.py" in register
  23. return direct_to_template('success.html',{})
File "C:\Python27\lib\site-packages\django\views\generic\simple.py" in
direct_to_template
  26. c = RequestContext(request, dictionary)
File "C:\Python27\lib\site-packages\django\template\context.py" in __init__
  177. self.update(processor(request))
File "C:\Python27\lib\site-packages\django\core\context_processors.py" in
debug
  53. if settings.DEBUG and request.META.get('REMOTE_ADDR') in
settings.INTERNAL_IPS:

Exception Type: AttributeError at /cd/registration/register/
Exception Value: 'str' object has no attribute 'META'


On Sat, Jun 25, 2011 at 11:04 PM, Karen Tracey  wrote:

> On Sat, Jun 25, 2011 at 1:00 PM, CareerDhaba tech wrote:
>
>> The user model is getting saved with username and password but the
>> userprofile isn;t :(
>
>
> That is a somewhat misleading description of the problem since the code as
> you have posted it would not just fail to save the userprofile it would
> raise an exception on the attempt to pass user to RegForm, since RegForm as
> you have shown it is not expecting user as a keyword argument.
>
> The right way to handle saving model forms which have explicitly excluded
> necessary data is described here:
> https://docs.djangoproject.com/en/1.3/topics/forms/modelforms/#using-a-subset-of-fields-on-the-form
>
> In this case you would want to save the originally-created RegForm instance
> uprofile with comit=False, then set the user attribute to the user returned
> by the other form save, then save the user profile instance:
>
> up = uprofile.save(commit=False)
> up.user = userid
> up.save()
>
> Karen
> --
> http://tracey.org/kmt/
>
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> You received this message because you are subscribed to the Google Groups
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>

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Re: Foreign key dependent model's data not getting saved !

[Karen Tracey]

On Sat, Jun 25, 2011 at 1:00 PM, CareerDhaba tech wrote:

> The user model is getting saved with username and password but the
> userprofile isn;t :(


That is a somewhat misleading description of the problem since the code as
you have posted it would not just fail to save the userprofile it would
raise an exception on the attempt to pass user to RegForm, since RegForm as
you have shown it is not expecting user as a keyword argument.

The right way to handle saving model forms which have explicitly excluded
necessary data is described here:
https://docs.djangoproject.com/en/1.3/topics/forms/modelforms/#using-a-subset-of-fields-on-the-form

In this case you would want to save the originally-created RegForm instance
uprofile with comit=False, then set the user attribute to the user returned
by the other form save, then save the user profile instance:

up = uprofile.save(commit=False)
up.user = userid
up.save()

Karen
-- 
http://tracey.org/kmt/

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Foreign key dependent model's data not getting saved !

[CareerDhaba tech]

Whats the problem with this code ?

*models.py

*class userprofile(models.Model):
user = models.OneToOneField(User)
Firstname = models.CharField(max_length=20)
Middlename = models.CharField(max_length=20)
Surname = models.CharField(max_length=20)
Gender = models.CharField(max_length=1, blank=False,
choices=GENDER_CHOICES)
Date_of_Birth = models.DateField()
Hometown = models.ForeignKey(city)
StudentType = models.CharField(max_length=20, blank=False,
choices=STUDENT_CHOICES)
*
forms.py
*from django.contrib.auth
class RegForm(ModelForm):
Date_of_Birth = forms.DateField(widget=SelectDateWidget(years=[y for y
in range(1960,2005)]))
class Meta:
model = userprofile
exclude = ('user',)

*
views.py
*from django.contrib.auth.forms import UserCreationForm

def register(request):
if request.method == 'POST':
form = UserCreationForm(request.POST)
uprofile = RegForm(request.POST)
if form.is_valid() and uprofile.is_valid():
userid = form.save()
a = RegForm(request.POST,user = userid)
a.save()
return direct_to_template('success.html',{})
else:
userform = UserCreationForm()
RF = RegForm()

return render_to_response('register.html',{
'uf': userform,
'rf': RF,
})

return render_to_response('regcheck1.html',{})
*
regcheck1.html

*{%
csrf_token %}
{{ rf.as_p }}
{{ uf.as_p }}

*

*The user model is getting saved with username and password but the
userprofile isn;t :(

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