Okay I am having a bit of an issue.
I want to create a button with a link, and right now I am using action={% url views.contest_overview %} in hopes that the reverse lookup by Django will match (r'^category/$', views.contest_overview), in my urls.py. However, this is not working and I can't figure out the proper nomenclature, despite numerous guesses.
The error I get (with my best guess above) is:
Caught NoReverseMatch while rendering: Reverse for
'views.contest_overview' with arguments '()' and keyword arguments
'{}' not found.
Thank you very much for your time!
Use the application name in the url tag, e.g. {% url myapp.views.contest_overview %}
This is what I usually do; I give names to my url. For example:
url(r'^account/register/$', 'someapp.views.register_view', name='account_register'),
Therefore in template, I can do this:
{% url account_register as url_acc_register %}
<html>
..
..
Some link
Related
I'm trying to make a picture the url to the post the picture represents, and I must be doing something wrong, but I don't know what.
I am getting this error when trying to visit the home page of my site.
Error during template rendering
In template .../home.html, error at line 48
Reverse for 'view_post' with keyword arguments '{'post_id': ''}' not found. 1 pattern(s) tried: ['post/(?P[0-9]+)/$']
and the code it showcases
<img src="media/{{ item.image }}">
Also this is my view
def view_post(request, post_id):
post = get_object_or_404(Post,id=post_id)
return render(request,'gram/view_post.html',{'post': post})
And url
url(r'^post/(?P<post_id>[0-9]+)/$', views.view_post, name='view_post'),
Thank you for your help.
I make some assumptions based on your code examples. This line:
post = get_object_or_404(Post,id=post_id)
says that the class Post has a property id. However in your template you call post.post_id. Assuming that post is an object instance of the class Post, it should have the property id. Probably there is no such property like post_id in the class Post.
This means that in the template post.post_id won't return an output. Your urls, which are not shown here, expect an integer ['post/(?P[0-9]+)/$']. Therefore the error is thrown.
Try this snippet:
{% url 'view_post' post_id=post.id %}
and check what happens.
As I said, this is based on some presumptions and I don't guarantee success.
Turned out I'm just stupid and made it hard for myself. The problem was I've done <a href in my home.html and home view didn't know what post.id is - obviously. The problem is fixed.
I'm a begginer grasping at straws with difficulty dealing with the django slug url system and these NoReverseMatch errors that make no sense to me even after reading the docs.
I have a django project. In one of the views, I pass a list of geoJSON features into a template, and show them on a map. I want to have each feature act as a clickable 'link' to a view that will show stuff about it. The following is part of the template that has those features that I want to click on:
//part of the template:
<script type="text/javascript">
...
function onEachFeature(feature, layer) {
layer.on('click', function (e) {
window.location.href = "{% url 'polls:areadetail' feature.properties.myslug%}";
});
}
(I have confirmed that feature.properties.myslug does in fact contain the slug I want).
The url pattern I want to go to:
urlpatterns = [...
url(r'^areadetail/(?P<areaslug>[-\w]+)/$', views.AreaDetail, name='areadetail'),]
And the view it relates to:
def AreaDetail(request, areaslug):
area = get_object_or_404(Area, nameslug=areaslug)
return render(request, 'polls/areadetail.html', {'area':area})
The issue I get is, by doing what I show and placing that url reference inside that template I show above, that I want to be able click on, that template won't even work at all, giving me a 'Error during template rendering' full page error info that starts with:
NoReverseMatch at /polls/areas/
Reverse for 'areadetail' with arguments '('',)' and keyword arguments '{}' not found. 1 pattern(s) tried: [u'polls/areadetail/(?P[-\w]+)/$']
Any help would be immensely appreciated
EDIT part1: As I've said in response to falsetru, I'm sure feature.properties.myslug has in fact got a slug expression in it.
EDIT2: Based on something I found in a django ticket, I've made a slight change in the url regex at urls.py, from (?P<areaslug>[-\w]+)/$ to (?P<areaslug>[-\w]+)?/$ and now the error is:
Page not found (404)
Request Method: GET Request URL: http://127.0.0.1:8000/polls/areadetail// Raised by: polls.views.AreaDetail
Is it possible that because the "{% url 'polls:areadetail' feature.properties.myslug%}" bit is inside javascript, that feature.properties.myslug is not being inserted there correctly? Like some sort of brackets are needed here?
According to the error message, feature.properties.myslug is empty or has no value.
Make sure the feature.properties.myslug is passed correctly from view.
Comment out {% url .. %} temporarily.
Print {{ feature }}, {{ feature.properties }}, {{ feature.properties.myslug }} to see if which part is missing.
Fix view accordingly.
Uncomment {% url .. %}.
After some more digging around I've found the answer to why doesn't this work in another question at:
How to pass javascript variable to django custom filter
The answer to it by Ludwik Trammer says:
Django templates are build on the server side, while JavaScript is executed on the client side.
That means that template code is always executed before JavaScript (as
it is executed by the server, before the page is sent to the client).
As a consequence it is absolutely impossible to mix JavaScript and
Django code the way you want to.
Which clearly applies here. I was focused on problems with the URL template, regex on the urls.py file etc. when the problem was that no matter what I did, because it's in a javascript section, run client-side, that URL template will always be incomplete no matter what I do, therefore being an impossible solution to what I want.
I'm having trouble getting password_reset_confirm to work. I have looked at numerous solutions, but none seem to be working for me.
urls.py: (in particular, the third line)
(r'^resetpassword/passwordsent/$', 'django.contrib.auth.views.password_reset_done', name="reset_password"),
(r'^resetpassword/$', 'django.contrib.auth.views.password_reset', name="reset_password"),
(r'^reset/(?P<uidb64>[0-9A-Za-z_\-]+)-(?P<token>,+)/$', 'django.contrib.auth.views.password_reset_confirm'),
(r'^reset/done/$', 'django.contrib.auth.views.password_reset_complete'),
the password_reset_email.html:
{% load url from future %}
{% autoescape off %}
Someone asked for password reset for email {{ email }}. Follow the link below:
{{ protocol}}://{{ domain }}{% url 'django.contrib.auth.views.password_reset_confirm' uidb64=uid token=token %}
{% endautoescape %}
Everything seems to be working fine, until I submit my e-mail and get the following error:
Reverse for 'django.contrib.auth.views.password_reset_confirm' with arguments '()' and keyword arguments '{u'uidb64': 'OQ', u'token': u'3n2-0fee9d3f98dad36e63d8'}' not found. 2 pattern(s) tried: ['/$reset/(?P<uidb64>[0-9A-Za-z_\\-]+)/(?P<token>[0-9A-Za-z]{1,13}-[0-9A-Za-z]{1,20})/$', 'reset/(?P<uidb64>[0-9A-Za-z_\\-]+)-(?P<token>,+)/$']
I am using Django 1.6.
Any help is much appreciated! Thanks!
You can see from the exception what's going on, although it's a little hard to spot. If you look at what patterns it tried:
2 pattern(s) tried: ['/$reset/(?P<uidb64>[0-9A-Za-z_\\-]+)/(?P<token>[0-9A-Za-z]{1,13}-[0-9A-Za-z]{1,20})/$', 'reset/(?P<uidb64>[0-9A-Za-z_\\-]+)-(?P<token>,+)/$']
You should notice that the first pattern is the one that should generally match, in the sense that it accepts a token with a - in it. But it has a stray $ prepending the rest of its content, so actually it can't match anything:
'/$reset/...'
You don't show the urls.py line that establishes that pattern - the third line you refer to can only match a token consisting of nothing but commas:
(?P<token>,+)
So while I can safely say that you need to correct your urls.py, I cannot say exactly where you need to correct it. If you intend to match that urls.py line, you should update the token group regexp to accept your actual token values, and should figure out why the other one is around to match at all. That said, if - is a valid character to appear as part of your token I think you'll find it easier overall to use / as a divider between your uidb64 field and your token, as your first regexp does except for the stray $.
In a template, I have {% url "news.views.article" article=article.id %} where article.id is the ID of an article currently being displayed. My urls.py contains this:
url(r'^news/$', 'news.views.index'),
url(r'^news/article/(?P<article>\d{1,4})/$', 'news.views.article'),
However, when I load the page containing the above templatetag, I get this:
NoReverseMatch at /news/
Reverse for '"news.views.article"' with arguments '()' and keyword arguments '{'article': 2}' not found.
Try it without the quotes around your view definition.
{% url news.views.article article=article.id %}
You've already defined the view name, so this should work by calling the function by name.
The syntax with quotes around the view name works only for Django 1.5. Since you're probably using an older version, you should remove the quotes, or add in your template:
{% load url from future %}
and then use the quotes.
More info on the deprecation - Django 1.3 release notes
trying to use the Django {%url %} template tag and keep failing.
the view is defined in sitename/transfers/views.py (where transfers is the django app name):
def description_ListView(requesst,**kwargs):
template_name = 'transfers/description.html'
o = get_list_or_404(Transfer, description =kwargs['description'])
#print ('o:',o)
context_object_name = "transfer_name_list"
return render_to_response(template_name,{context_object_name:o,'description':kwargs['description']})
(yes, I DO know that this code is a little strange. working on making this more generic and caught in the middle with this annoying problem)
and the url is mapped in transfers/urls.py
url(r'^description/(?P<description>[\w ]+)/$',
'transfers.views.description_ListView',
name = 'description_url')
and in the tag:
{% url "description_url" "blabla" %}
also tried:
{% url "transfers.views.Description_ListView" description = "blabla" %}
the error message:
Exception Type: NoReverseMatch
Exception Value:
Reverse for '"description_url"' with arguments '(u'blabla',)' and keyword arguments '{}' not found.
or when i Tried using the as somename syntax and calling it like this: `{{somename}}. just failed silently and didn't produce anything.
where I also tried importing the Description_ListView from the views and using it directly, didn't help.
Also, following the advice of numerous answers on this subject in various SO questions I changed to double quotes around the view, and reverted to using the url name instead of view but neither helped.
I'll be glad for any help with this
I don't think you need quotes. Try:
{% url description_url "blabla" %}
See https://docs.djangoproject.com/en/dev/topics/http/urls/#naming-url-patterns