Why does Django try the wrong url pattern?

Question

Django tries the wrong url pattern but I can not find my mistake.

urls.py

     url(r'^message/(?P<advertisementid>(\d+))/$', chat_view, name="chat_view_with_toid"),
     url(r'^profile/(?P<userid>(\d+))/$', profile_view, name="profile"),
     url(r'^details/(?P<advertisementid>(\d+))/$', details_view, name='details'),

views.py

def details_view(request, advertisementid):
    advertisement_data = Advertisement.objects.get(id=advertisementid)
    return render(request, "details.html", {"advertisement_data": advertisement_data})

def profile_view(request, userid):
    advertisements = Advertisement.objects.filter(user__id=userid)
    return render(request, "profile.html", { 'advertisements': advertisements } )

details.html (from where I want to resolve to the users profile)

<a href="{% url 'profile' userid=advertisement_data.user.id %}" style="text-decoration:none;">
<input type="submit" class="details-btn-profile" value="Profile"></a>

    <a href="{% url 'chat_view_with_toid' advertisementid=advertisement_data.id %}" 
    style="text-decoration:none">
    <input type="submit" class="details-btn-contact" value="Kontakt"></a>

main.html

<a href="{% url 'details' advertisementid=advertisement.id %}">
<img src="{% static advertisement.image.url  %}" alt="Image"/></a>

When I click on button class="details-btn-profile" Django gives me this error:

Reverse for 'details' with no arguments not found. 1 pattern(s) tried: ['details/(?P(\d+))/$']

Why does it resolve to details ? Any ideas ?

A form would control the behavior of any submit button inside. I'm not sure what happens if there is no form. There could be an implicit default one resulting into a GET to the same URL and the given error. — Klaus D.
– Klaus D., Commented Oct 8, 2017 at 10:36

score 1 · Accepted Answer · 2017-10-08 10:34:25Z

1

when you click the button you send form where action wrong may be empty attr action something like it:

<form action="">

you need set it:

<form action="{% url 'profile' userid=advertisement_data.user.id %}">
           <!-- ^^^^^^^^^^^^^-->

or if you want to go link by click the just change type

 <input type="button" class="details-btn-profile" value="Profile">
    <!-- ^^^^^^^^^^-->

edited Oct 8, 2017 at 10:34

answered Oct 8, 2017 at 10:24

user8060120

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2 Comments

Coder949 Over a year ago

You are right but I really need a form for that ? I did it in another place just with <a href= etc. .. It should be enough or am I wrong ?

Coder949 Over a year ago

You are right using button is better than submit, thanks

Wessi · Accepted Answer · 2017-10-08 10:19:52Z

0

The url name chat_view_with_toid doesn't seem to exist in your urls.py.

answered Oct 8, 2017 at 10:19

Wessi

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3 Comments

Jon Clements Over a year ago

Yeah... although the actual error message suggests there's something else afoot... Doesn't look like the OP has provided it...

Jon Clements Over a year ago

@AaronVisang so where are you using {% url 'details' ... %} - we can only see {% url 'chat_view_with_toid' ... %} in your template...

Coder949 Over a year ago

I add it now it was in my main.html

Coder949 · Accepted Answer · 2017-10-08 10:38:33Z

0

Sorry for wasting your time, I found my mistake. On profile.html I had this HTML-Code:

<a href="{% url 'details' %}" class="announce-hedline"><h3>BMW 320i Limousine</h3></a>

So "{% url 'details' %}" can not be resolved because of missing the advertisementid which it needs to be resolved.

I searched for mistakes in the wrong place.

Thank you all for your help !

answered Oct 8, 2017 at 10:38

Coder949

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