view.py file

class DealsForm(ModelForm):
    class Meta:
        model = Product
        fields = 
['title','description','category','price','sale_price','slug','active','update_defaults','user']
        exclude = ('user',)



model.py file



class Product(models.Model):
    title = models.CharField(max_length=120)
    description = models.TextField(null=True, blank=True,max_length=200)
    category = models.ManyToManyField(Category, null=True, blank=True)
    price = models.DecimalField(decimal_places=2, max_digits=100, default=29.99)
    sale_price = models.DecimalField(decimal_places=2, max_digits=100,\
                                            null=True, blank=True)
    slug = models.SlugField(unique=True)
    timestamp = models.DateTimeField(auto_now_add=True, auto_now=False)
    updated = models.DateTimeField(auto_now_add=False, auto_now=True)
    active = models.BooleanField(default=True)
    update_defaults = models.BooleanField(default=False)
    user = models.ForeignKey(User)   

    def __unicode__(self):
        return self.title

    class Meta:
        unique_together = ('title', 'slug')

    def get_price(self):
        return self.price

    def get_absolute_url(self):
        return reverse("single_product", kwargs={"slug": self.slug})

    def save(self, request, *args, **kwargs):
        obj = super(DealsForm, self).save(commit=False, *args, **kwargs)
        obj.user = request.user 
        obj.save() 


Can you solve this problems ?  

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