问题
How to can I address this NoReverseMatch error?
Context
I want to document this question as much as possible in order to be able to detail the origin of the problem.
I have a model named LodgingOffer, to create a lodging offer and have the detail their information
class LodgingOffer(models.Model):
# Foreign Key to my User model
created_by = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
ad_title = models.CharField(null=False, blank=False,
max_length=255, verbose_name='Título de la oferta')
slug = models.SlugField(max_length=100, blank=True)
# ... Another fields ...
def __str__(self):
return "%s" % self.ad_title
def get_absolute_url(self):
return reverse('host:detail', kwargs = {'slug' : self.slug })
# I assign slug to offer based in ad_title field,checking if slug exist
def create_slug(instance, new_slug=None):
slug = slugify(instance.ad_title)
if new_slug is not None:
slug = new_slug
qs = LodgingOffer.objects.filter(slug=slug).order_by("-id")
exists = qs.exists()
if exists:
new_slug = "%s-%s" % (slug, qs.first().id)
return create_slug(instance, new_slug=new_slug)
return slug
# Brefore to save, assign slug to offer created above.
def pre_save_article_receiver(sender, instance, *args, **kwargs):
if not instance.slug:
instance.slug = create_slug(instance)
pre_save.connect(pre_save_article_receiver, sender=LodgingOffer)
For this model, I have a DetailView named HostingOfferDetailView .
An important objective I want to pursue and for which I ask this question is that in the detail view of an LodgingOffer object, I should be able to contact the owner of that offer (object LodgingOffer - user who created it -) so that another interested user can apply to it.
I would like that in the detail view for the LodgingOffer object be able to contact the offer owner (object LodgingOffer - user who created it -) so others users interested could apply to it
For this purpose, I have contact_owner_offer() function, is where I send an email to the owner of this offer.
I'm doing all using the HostingOfferDetailView detail view like this:
class HostingOfferDetailView(DetailView):
model = LodgingOffer
template_name = 'lodgingoffer_detail.html'
context_object_name = 'lodgingofferdetail'
def get_context_data(self, **kwargs):
context = super(HostingOfferDetailView, self).get_context_data(**kwargs)
user = self.request.user
# Get the related data offer
#lodging_offer_owner = self.get_object()
lodging_offer_owner_full_name = self.get_object().created_by.get_long_name()
lodging_offer_owner_email = self.get_object().created_by.email
lodging_offer_title = self.get_object().ad_title
user_interested_email = user.email
user_interested_full_name = user.get_long_name()
# Send to context email of owner offer and user interested in offer
context['user_interested_email'] = user_interested_email
context['lodging_offer_owner_email'] = lodging_offer_owner_email
# Send the data (lodging_offer_owner_email
# user_interested_email and lodging_offer_title) presented
# above to the contact_owner_offer function
contact_owner_offer(self.request, lodging_offer_owner_email, user_interested_email, lodging_offer_title)
return context
My contact_owner_offer() function receives these offer parameters and sends an email to the owner of the offer or the publisher, as follows:
def contact_owner_offer(request, lodging_offer_owner_email, user_interested_email, lodging_offer_title):
user = request.user
if user.is_authenticated:
# print('Send email')
mail_subject = 'Interest in your offer'
context = {
'lodging_offer_owner_email': lodging_offer_owner_email,
# User owner offer - TO send email message
'offer': lodging_offer_title,
# offer for which a user asks
'user_interested_email': user_interested_email,
# Interested user offer
'domain': settings.SITE_URL,
'request': request
}
message = render_to_string('contact_user_own_offer.html', context)
#to_email = lodging_offer_owner.email,
send_mail(mail_subject, message, settings.DEFAULT_FROM_EMAIL,
[lodging_offer_owner_email], fail_silently=True)
I have done this as a test and so far everything is as I wanted, and the result is that when I enter the URL of a detailed offer object LodgingOffer, an email is sent to the owner of that offer.
What I would like that the offer detail template has a button with contains "Contact the owner of the offer" and when any user who presses it send an email to the owner of the offer.
To do this I defined a URL for contact_owner_offer() function and it has a link on the href attribute of a button in my template.
The URL, (according to my understanding and this is where the doubt and the reason for my question resides) I have defined it according to the number of parameters that the contact_owner_offer() function receives.
This means my URL must receive:
- The offer owner's email address
- The e-mail address of the user interested in the offer
- The title of the offer, although for this I'm sending you the slug of that title, I don't know if that's correct.
So, according to the above, I've created this URL:
url(r'^contact-to-owner/(?P<email>[\w.@+-]+)/from/'
r'(?P<interested_email>[\w.@+-]+)/(?P<slug>[\w-]+)/$',
contact_owner_offer, name='contact_owner_offer'),
Then, in my template, I generate an html button where I call this URL sending them their respective parameters that expect:
<div class="contact">
<a class="contact-button" href="{% url 'host:contact_owner_offer' email=lodging_offer_owner_email interested_email=user_interested_email slug=lodgingofferdetail.slug %}">
<img src="{% static 'img/icons/contact.svg' %}" alt="">
<span>Contact owner offer</span>
</a>
</div>
What happens to me is that when I enter the offer detail template and click on the Contact owner offer reference button immediately above, I get the following error message:
TypeError: contact_owner_offer() got an unexpected keyword argument 'email'
[10/Oct/2017 01:04:06] "GET /host/contact-to-owner/botibagl@gmail.com/from/ces@ces.edu.co/apartacho/ HTTP/1.1" 500 77979
My traceback is here
Traceback:
File "/home/bgarcial/.virtualenvs/hostayni/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
42. response = get_response(request)
File "/home/bgarcial/.virtualenvs/hostayni/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/home/bgarcial/.virtualenvs/hostayni/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
Exception Type: TypeError at /host/contact-to-owner/botibagl@gmail.com/from/botibagl@gmail.com/apartacho/
Exception Value: contact_owner_offer() got an unexpected keyword argument 'email'
What I don't understand, is because it tells me that my URL doesn't wait for an argument called email which is where I pass the parameter email=lodging_offer_owner_owner_email through the button in the template.
I appreciate any guidance Best Regards
UPDATE
According to the @RajKris and @Daniel recommendations I've changed slightly my URL regex, specifying the name of the keyword argument which I am passing. The URL stay of this way:
url(r'^contact-to-owner/(?P<lodging_offer_owner_email>[\w.@+-]+)/from/'
r'(?P<interested_email>[\w.@+-]+)/(?P<slug>[\w-]+)/$',
contact_owner_offer,
name='contact_owner_offer'
),
This mean, I am naming the url parameters of the same way in which I've named the parameters that contact_owner_offer() receive.
And when I enter the offer detail template and click on the Contact owner offer reference button I get the NoReverseMatch error
Template error:
In template /home/bgarcial/workspace/hostayni_platform/hosts/templates/lodgingoffer_detail.html, error at line 193
Reverse for 'contact_owner_offer' with arguments '()' and keyword arguments '{'email': 'botibagl@gmail.com', 'interested_email': 'botibagl@gmail.com', 'slug': 'apartacho'}' not found. 1 pattern(s) tried: ['host/contact-to-owner/(?P<lodging_offer_owner_email>[\\w.@+-]+)/from/(?P<interested_email>[\\w.@+-]+)/(?P<slug>[\\w-]+)/$'] 183 : </tr>
184 : <tr>
185 : <td>{{ lodgingofferdetail.room_value }}</td>
186 : <td>{{ lodgingofferdetail.additional_description }}</td>
187 : <td>{{ lodgingofferdetail.lodging_offer_owner_email }}</td>
188 : </tr>
189 : </tbody>
190 : </table>
191 : </div>
192 : <div class="contact">
193 : <a class="contact-button" href=" {% url 'host:contact_owner_offer' email=lodging_offer_owner_email interested_email=user_interested_email slug=lodgingofferdetail.slug %} ">
194 : <img src="{% static 'img/icons/contact.svg' %}" alt="">
195 : <span>Contactar</span>
196 : </a>
197 : </div>
The general traceback is here:
File "/home/bgarcial/.virtualenvs/hostayni/lib/python3.6/site-packages/django/urls/resolvers.py" in _reverse_with_prefix
392. (lookup_view_s, args, kwargs, len(patterns), patterns)
Exception Type: NoReverseMatch at /host/lodging-offer/apartacho/
Exception Value: Reverse for 'contact_owner_offer' with arguments '()' and keyword arguments '{'email': 'botibagl@gmail.com', 'interested_email': 'botibagl@gmail.com', 'slug': 'apartacho'}' not found. 1 pattern(s) tried: ['host/contact-to-owner/(?P<lodging_offer_owner_email>[\\w.@+-]+)/from/(?P<interested_email>[\\w.@+-]+)/(?P<slug>[\\w-]+)/$']
How to can I address this NoReverseMatch error?
回答1:
In the URL regex you have to specify, name of the kyword arg you're passing:
url(r'^contact-to-owner/(?P<email1>[\w.@+-]+)/from/' r'(?P<email1>[\w.@+-]+)/(?P<email3>[\w-]+)/$', contact_owner_offer, name='contact_owner_offer'),
This is referred here:
Django Doc
回答2:
Why not using simple url with get params?
e.g. "contact-to-owner/?owner-email=xxx&user-email=xxx&title=xxx"
来源：https://stackoverflow.com/questions/46666557/passing-multiple-parameters-to-django-url-unexpected-keyword-argument