I have this model to add new products to a database:
--
class Product(models.Model):
user = models.ForeignKey(User)
productid = models.CharField(max_length=40, blank=True)
prodname = models.CharField(max_length=255, verbose_name='Product
name')
proddesc = models.TextField(blank=True, verbose_name='Description')
prodtype = models.ForeignKey(Prodtype, verbose_name='Product Type')
unit = models.ForeignKey(Units, verbose_name='Unit')
image = models.ManyToManyField('Image', blank=True,
verbose_name='Image')
video = models.ManyToManyField('Video', blank=True,
verbose_name='Video')
costperunit = models.DecimalField(max_digits=6, decimal_places=2,
verbose_name='Cost per unit')
costperlot = models.DecimalField(max_digits=6, decimal_places=2,
verbose_name='Cost per lot')
available = models.BooleanField(default=True)
featured = models.BooleanField(blank=True, null=True)
def __unicode__(self):
return self.prodname
--
It has a ModelForm with a custom __init__ definition to get an
associated list of video files:
--
class ProductForm(ModelForm):
def __init__(self, user, *args, **kwargs):
super(ProductForm, self).__init__(*args, **kwargs)
self.fields['video'].queryset = Video.objects.filter(user=user)
class Meta:
model = Product
exclude = ('user', 'productid', 'available', 'featured')
--
If I use this model and model form to edit a product using this view,
which I know is a bit hacky, but will be tidied up eventually:
--
def edit_product(request, prodid):
if request.user.is_authenticated():
user = request.user
try:
product = Product.objects.get(id = prodid)
except Product.DoesNotExist:
pass
if request.method == 'POST':
productform = ProductForm(request.POST,
instance=product)
productform.user = user
if productform.is_valid:
productid = productform.save()
return
HttpResponseRedirect('/product/'+productid )
else:
return
render_to_response('products/base_newproduct.html',
{ 'productform': productform })
else:
productform = ProductForm(request.user or None,
instance=product)
errormsg = ''
return render_to_response('products/base_newproduct.html',
{ 'productform': productform })
--
On submitting the query, I get and AttributeError: 'ProductForm'
object has no attribute 'cleaned_data'
I understand why this is returned as I'm not handling the is_valid
statement. However, there are no errors coming back that I can see,
either in the 500 response or if I run the query from a shell. From
the traceback I get this:
--
Traceback:
File "/usr/lib/python2.5/site-packages/django/core/handlers/base.py"
in get_response
86. response = callback(request, *callback_args,
**callback_kwargs)
File "/usr/lib/python2.5/site-packages/django/contrib/auth/
decorators.py" in __call__
67. return self.view_func(request, *args, **kwargs)
File "/var/www/stocktube/products/views.py" in edit_product
49. productid = productform.save()
File "/usr/lib/python2.5/site-packages/django/forms/models.py" in save
319. return save_instance(self, self.instance,
self._meta.fields, fail_message, commit)
File "/usr/lib/python2.5/site-packages/django/forms/models.py" in
save_instance
43. cleaned_data = form.cleaned_data
Exception Type: AttributeError at /products/edit/1/
Exception Value: 'ProductForm' object has no attribute 'cleaned_data'
--
and the response from the cleaned_data request (doesn't format
properly but read alternate lines)
commit
True
exclude
None
fail_message
'changed'
fields
None
form
<stocktube.products.models.ProductForm object at 0xa08476c>
instance
<Product: 200 iDogs>
models
<module 'django.db.models' from '/usr/lib/python2.5/site-packages/
django/db/models/__init__.pyc'>
opts
<Options for Product>
>From the shell I get this:
--
<type 'exceptions.AttributeError'> Traceback (most recent call
last)
/home/simong/projects/stocktube/<ipython console> in <module>()
/usr/lib/python2.5/site-packages/django/forms/models.py in save(self,
commit)
317 else:
318 fail_message = 'changed'
--> 319 return save_instance(self, self.instance,
self._meta.fields, fail_message, commit)
320
321 class ModelForm(BaseModelForm):
/usr/lib/python2.5/site-packages/django/forms/models.py in
save_instance(form, instance, fields, fail_message, commit, exclude)
41 raise ValueError("The %s could not be %s because the
data didn't"
42 " validate." % (opts.object_name,
fail_message))
---> 43 cleaned_data = form.cleaned_data
44 file_field_list = []
45 for f in opts.fields:
<type 'exceptions.AttributeError'>: 'ProductForm' object has no
attribute 'cleaned_data'
--
which tells me that something isn't validating, but no answers as to
what. productform.errors in the shell returns nothing. The error
occurs even if don't change anything on the form, and still happens if
I include the 'user' field.
In short, is there anything obvious that I'm missing? The site user
has permission to add, change and delete in the model. The database is
Mysql and the database user has select, create, insert, update and
delete privileges.
I have to admit that I'm very frustrated with the Forms documentation
as it seems to assume that everyone wants standard forms with no
custom output, which I would regard to be the exception rather than
the norm. The lack of usable error reporting also seems to be a
fundamental problem in an important part of the framework. Or perhaps
it's something else I'm missing.
TIA
Simon
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