NoReverseMatchについて

Question

前提・実現したいこと

いいね機能実装中に詰まりました
該当のページを開くとNoReverseMatch at /notes/ar1/と表示されてしまいます。

発生している問題・エラーメッセージ

Traceback (most recent call last):
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/core/handlers/base.py", line 179, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/yoshihiro/Desktop/HBGB/mysite/notes/views.py", line 37, in note_ar1
    return render(request,'notes/note_ar1.html',{'notes': notes})
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/shortcuts.py", line 19, in render
    content = loader.render_to_string(template_name, context, request, using=using)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/loader.py", line 62, in render_to_string
    return template.render(context, request)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/backends/django.py", line 61, in render
    return self.template.render(context)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/base.py", line 170, in render
    return self._render(context)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/base.py", line 162, in _render
    return self.nodelist.render(context)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/base.py", line 938, in render
    bit = node.render_annotated(context)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/base.py", line 905, in render_annotated
    return self.render(context)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/loader_tags.py", line 53, in render
    result = self.nodelist.render(context)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/base.py", line 938, in render
    bit = node.render_annotated(context)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/base.py", line 905, in render_annotated
    return self.render(context)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/defaulttags.py", line 211, in render
    nodelist.append(node.render_annotated(context))
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/base.py", line 905, in render_annotated
    return self.render(context)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/template/defaulttags.py", line 446, in render
    url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/urls/base.py", line 87, in reverse
    return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
  File "/Users/yoshihiro/.local/share/virtualenvs/mysite-xs0jetOT/lib/python3.8/site-packages/django/urls/resolvers.py", line 685, in _reverse_with_prefix
    raise NoReverseMatch(msg)
django.urls.exceptions.NoReverseMatch: Reverse for 'like' not found. 'like' is not a valid view function or pattern name.

該当のソースコード

from django.shortcuts import render, redirect
from django.views import generic
from .models import Note,Article
from django.urls import reverse_lazy
from django.contrib.auth.mixins import LoginRequiredMixin
from django.views.generic import TemplateView
from django.http import Http404
from django.http.response import JsonResponse
from .models import Article

def like(request,pk):
    try:
        article = Article.objects.get(pk=pk)
    except Article.DoesNotExist:
        raise Http404
    article.like += 1 
    article.save() 
    return redirect(article,pk)    


def api_like(request,pk):
    try:
        article = Article.objects.get(pk=pk)
    except Article.DoesNotExist:
        raise Http404
    article.like += 1 
    article.save()  
    return JsonResponse({"like": article.like})

from django.urls import path
from . import views
from notes.views import TemplateView

app_name = 'notes'

urlpatterns = [
    path("article/<int:pk>/like/",views.like,name='like'),
    path("api/like/<int:pk>/",views.api_like,name="api_like"),
]

{% block content %}
<body>
    {% for note in notes %}
        <a href="">
            <div class="note">
                <a href="{{ note.file.url }}" target="_blank"><img src="{{ note.file.url }}" width="300" alt="" border="0"></a>
                <h3>{{ note.title }}</h3>
                <h5>投稿日{{ note.date }}</h5>
                <p><a href="{% url "like" article.pk %}"><span id="like">{{ article.like }}</span>いいね！</a></p>
            </div>
        </a>    
    {% endfor %}
</body>        
{% endblock %}

Comments

[quickquip]

「何をした時」にでたエラーなのか書かれていないようです。またTracebackを省略する必要はまったくありません。
https://teratail.com/help/question-tips#questionTips3-4-2
> 自分でタイプしなおしたり、自分で解釈・要約しようとしてはいけません。

コードも明らかにインデントが無くなっていて、読めなくなっています。

Answer 1

urls.pyでapp_nameを指定しているので、

<a href="{% url "like" article.pk %}">
```を、
```HTML
<a href="{% url 'notes:like' article.pk %}">
```にします。
あと、文字列の中の文字列は、シングルクォーテーションとダブルクォーテーションで分けます。