lesson 51

core/urls.py

@@ -22,11 +22,17 @@ from web import views
 urlpatterns = [
     path('admin/', admin.site.urls),
     path('', views.MainPageRedirectView.as_view()),
-    path('articles/', views.index_view, name='main_page'),
+    path('articles/', views.ArticleIndexView.as_view(), name='main_page'),
     path('articles/add/', views.ArticleCreateView.as_view(), name='articles-add'),
     # /articles/1/ OR /articles/?id=1
     # article_details_view(request, id)
     path('articles/<int:id>/', views.ArticleDetailView.as_view(), name='articles-detail'),
     path('articles/<int:id>/edit', views.ArticleUpdateView.as_view(), name='article_update'),
-    path('articles/<int:id>/delete', views.delete_article, name='delete_article')
+    path(
+        'articles/<int:article_id>/comments/',
+        views.ArticleCommentCreateView.as_view(),
+        name='article_comment_create'
+    ),
+
+    path('articles/<int:id>/delete', views.ArticleDeleteView.as_view(), name='delete_article')
 ] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

web/forms.py

@@ -2,7 +2,7 @@ from django import forms
 from django.forms import widgets, ValidationError
 
 from core.validators import at_least_5
-from web.models import Article
+from web.models import Article, Comment
 
 
 class ArticleForm(forms.Form):
@@ -30,3 +30,25 @@ class ArticleModelForm(forms.ModelForm):
             raise ValidationError('Text of the article should not duplicate it\'s title')
 
         return cleaned_data
+
+
+class ArticleCommentModelForm(forms.ModelForm):
+    class Meta:
+        model = Comment
+        fields = ['author', 'text']
+        widgets = {
+            'text': forms.TextInput(attrs={'class': 'form-control mb-3'}),
+            'author': forms.TextInput(attrs={'class': 'form-control mb-3'}),
+        }
+
+
+class SearchForm(forms.Form):
+    search = forms.CharField(
+        max_length=100,
+        required=False,
+        label='Найти',
+        widget=forms.TextInput(attrs={
+            'class': 'form-control my-3',
+            'placeholder': 'enter search value'
+        })
+    )

web/models/comment.py

 from django.db import models
 
 
-# article_1 - (comment_1, comment_2)
-# comment_1 = comment_1.article
-# comment_1 = comment_1.article_id
-
-# article_1 = article_1.comment.all()
-
 class Comment(models.Model):
-    # article - object
-    # article_id - id
     article = models.ForeignKey(
         'web.Article',
         on_delete=models.CASCADE,

web/templates/article_detail.html

@@ -26,5 +26,31 @@
 <hr>
 
 <a href="{% url 'article_update' article.pk %}" class="btn btn-primary mt-4 me-3">Edit</a>
-<a href="{% url 'delete_article' article.pk %}" class="btn btn-danger mt-4">Delete</a>
+<form action="{% url 'delete_article' article.pk %}" method="POST" onsubmit="confirm('Are you sure?')">
+    {% csrf_token %}
+    <button class="btn btn-danger mt-4">Delete</button>
+</form>
+
+<h3 class="mt-4">Comments:</h3>
+<div class="comments-list">
+    <form action="{% url 'article_comment_create' article_id=article.id %}" method="POST">
+        {% csrf_token %}
+        {% include 'partial/form.html' with button_text='add' %}
+    </form>
+    {% for comment in comments %}
+    <div class="card my-3">
+      <div class="card-header">
+        {{ comment.author }}
+      </div>
+      <div class="card-body">
+        <blockquote class="blockquote mb-0">
+          <p>{{ comment.text }}</p>
+          <footer class="blockquote-footer"><cite title="Source Title">{{ comment.created_at }}</cite></footer>
+        </blockquote>
+      </div>
+    </div>
+    {% empty %}
+        <p>No comments yet.</p>
+    {% endfor %}
+</div>
 {% endblock %}

web/templates/index.html

@@ -3,9 +3,10 @@
 
 
 {% block content %}
-<h1>Articles</h1>
-<a href="{% url 'articles-add' %}" class="btn btn-primary">Создать</a>
-{% for article in articles %}
+    <h1>Articles</h1>
+    <a href="{% url 'articles-add' %}" class="btn btn-primary">Создать</a>
+    {% include 'partial/search_form.html' %}
+    {% for article in articles %}
         <br>
         <hr>
         <br>
@@ -18,5 +19,9 @@
         <br>
         <hr>
         <br>
-{% endfor %}
+    {% endfor %}
+
+{% if is_paginated %}
+        {% include 'partial/pagination.html' %}
+    {% endif %}
 {% endblock %}

web/templates/partial/pagination.html

+<div class="d-flex justify-content-center ">
+    <nav aria-label="...">
+    <ul class="pagination">
+        {% if page_obj.has_previous %}
+            <li class="page-item">
+                <a class="page-link" href="?{% if query %}{{ query }}&{% endif %}page={{ page_obj.previous_page_number }}">Previous</a>
+            </li>
+        {% else %}
+            <li class="page-item disabled">
+                <a class="page-link" href="#">Previous</a>
+            </li>
+        {% endif %}
+
+
+
+        {% for num in paginator.page_range %}
+            <li class="
+                page-item
+                {% if page_obj.number == num %}
+                    active
+                {% else %}
+                {% endif %}
+                ">
+                <a class="page-link" href="?{% if query %}{{ query }}&{% endif %}page={{ num }}">
+                    {{ num }}
+                </a>
+            </li>
+
+        {% endfor %}
+
+        {% if page_obj.has_next %}
+            <li class="page-item">
+                <a class="page-link" href="?{% if query %}{{ query }}&{% endif %}page={{ page_obj.next_page_number }}">Next</a>
+            </li>
+        {% else %}
+            <li class="page-item disabled">
+                <a class="page-link" href="#">Next</a>
+            </li>
+        {% endif %}
+    </ul>
+</nav>
+</div>
\ No newline at end of file

web/templates/partial/search_form.html

+<form action="" method="GET">
+    <label for="{{ form.search.id_for_label }}"></label>
+    {{ form.search }}
+    <button type="submit" class="btn btn-success">Submit</button>
+    {% for error in form.search.errors %}
+        <div class="alert alert-danger">{{ error }}</div>
+    {% endfor %}
+</form>
\ No newline at end of file

web/views.py

-from django.shortcuts import render, redirect, get_object_or_404
-from django.urls import reverse
-from django.views.generic import View, TemplateView, RedirectView, FormView
-from web.forms import ArticleForm, ArticleModelForm
-from web.models import Article, StatusChoices
-
-
-def index_view(request):
-    return render(
-        request, 'index.html', context={
-            'articles': Article.objects.order_by('-created_at'),
-            'reverse': reverse('articles-detail', kwargs={'id': 1})
-        }
-    )
-
+from urllib.parse import urlencode
+
+from django.shortcuts import get_object_or_404
+from django.urls import reverse, reverse_lazy
+from django.db.models import Q
+from django.views.generic import (
+    RedirectView,
+    ListView,
+    DetailView,
+    CreateView,
+    UpdateView,
+    DeleteView
+)
+from web.forms import ArticleModelForm, SearchForm, ArticleCommentModelForm
+from web.models import Article, Comment
+
+
+class ArticleIndexView(ListView):
+    template_name = 'index.html'
+    context_object_name = 'articles'
+    model = Article
+    ordering = ['-created_at']
+    paginate_by = 3
 
-class MainPageRedirectView(RedirectView):
-    pattern_name = 'main_page'
+    def dispatch(self, request, *args, **kwargs):
+        self.form = self.get_search_form()
+        self.search_value = self.get_search_value()
+        return super().dispatch(request, *args, **kwargs)
 
+    def get_context_data(self, *, object_list=None, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context['form'] = self.form
 
-# Class-based views
-class ArticleCreateView(View):
-    def get(self, request, *args, **kwargs):
-        form = ArticleModelForm()
+        if self.search_value:
+            context['query'] = urlencode({'search': self.search_value})
 
-        return render(
-            self.request,
-            'article_create.html',
-            context={
-                'status_choices': StatusChoices.choices,
-                'form': form
-            }
-        )
+        return context
 
-    def post(self, request, *args, **kwargs):
-        errors = {}
-        data = request.POST
-        form = ArticleModelForm(data=data)
-        if form.is_valid():
-            article = form.save()
-            return redirect('articles-detail', id=article.id)
-        else:
-            return render(self.request, 'article_create.html', context={'form': form, 'status_choices': StatusChoices.choices})
+    def get_queryset(self):
+        qs = super().get_queryset()
+        if self.search_value:
+            query = Q(title__icontains=self.search_value) | Q(author__icontains=self.search_value)
+            qs = qs.filter(query)
 
+        return qs
 
-# /articles/{id}
-def article_detail_view(request, id: int):
-    article = get_object_or_404(Article, id=id)
-    return render(request, 'article_detail.html', context={'article': article})
+    def get_search_form(self):
+        return SearchForm(self.request.GET)
 
+    def get_search_value(self):
+        if self.form.is_valid():
+            return self.form.cleaned_data.get('search')
 
-class ArticleDetailView(TemplateView):
-    template_name = 'article_detail.html'
 
-    def get_context_data(self, **kwargs):
-        article = get_object_or_404(Article, id=kwargs.get('id'))
-        return super().get_context_data(article=article)
+class MainPageRedirectView(RedirectView):
+    pattern_name = 'main_page'
 
 
-class ArticleUpdateView(FormView):
-    template_name = 'update.html'
+class ArticleCreateView(CreateView):
+    template_name = 'article_create.html'
+    model = Article
     form_class = ArticleModelForm
 
-    def dispatch(self, request, *args, **kwargs):
-        self.article = get_object_or_404(self.form_class.Meta.model, id=kwargs.get('id'))
-        return super().dispatch(request, *args, **kwargs)
+    def get_success_url(self):
+        return reverse('articles-detail', kwargs={'id': self.object.id})
 
-    def get_context_data(self, **kwargs):
-        return super().get_context_data(article=self.article, **kwargs)
 
-    def get_initial(self):
-        initial = self.article.__dict__
-        initial['tags'] = self.article.tags.all()
-        return initial
+class ArticleCommentCreateView(CreateView):
+    model = Comment
+    form_class = ArticleCommentModelForm
 
-    def get_form_kwargs(self):
-        return super().get_form_kwargs() | {'instance': self.article}
+    def dispatch(self, request, *args, **kwargs):
+        self.article = get_object_or_404(Article, id=self.kwargs.get('article_id'))
+        return super().dispatch(request, *args, **kwargs)
 
     def form_valid(self, form):
-        form.save()
+        form.instance.article = self.article
         return super().form_valid(form)
 
     def get_success_url(self):
         return reverse('articles-detail', kwargs={'id': self.article.id})
 
 
-def article_update_view(request, id):
-    article = get_object_or_404(Article, pk=id)
-    if request.method == 'GET':
-        form = ArticleForm(initial={
-            'title': article.title,
-            'status': article.status,
-            'author': article.author,
-            'text': article.text
-        })
-        return render(request, 'update.html', context={'article': article, 'form': form, 'status_choices': StatusChoices.choices})
-    elif request.method == 'POST':
-        form = ArticleForm(data=request.POST)
-        if form.is_valid():
-
-            article.title = request.POST.get('title')
-            article.author = request.POST.get('author')
-            article.text = request.POST.get('text')
-            article.status = request.POST.get('status')
-            article.save()
-            return redirect('articles-detail', id=article.pk)
-        else:
-            return render(request, 'update.html', context={'article': article, 'form': form, 'status_choices': StatusChoices.choices})
-    
-
-def delete_article(request, id):
-    article = get_object_or_404(Article, pk=id)
-    if request.method == 'GET':
-        return render(request, 'delete.html', context={'article': article})
-
-    elif request.method == 'POST':
-        article.delete()
-        return redirect('main_page')
+class ArticleDetailView(DetailView):
+    template_name = 'article_detail.html'
+    model = Article
+    context_object_name = 'article'
+    pk_url_kwarg = 'id'
+    extra_context = {'form': ArticleCommentModelForm}
+
+    def get_context_data(self, **kwargs):
+        return super().get_context_data(
+            comments=self.object.comments.order_by('-created_at'),
+            **kwargs
+        )
+
+
+class ArticleUpdateView(UpdateView):
+    model = Article
+    template_name = 'update.html'
+    form_class = ArticleModelForm
+    context_object_name = 'article'
+    pk_url_kwarg = 'id'
+
+    def get_success_url(self):
+        return reverse('articles-detail', kwargs={'id': self.object.id})
+
+
+class ArticleDeleteView(DeleteView):
+    model = Article
+    template_name = 'delete.html'
+    context_object_name = 'article'
+    success_url = reverse_lazy('main_page')
+    pk_url_kwarg = 'id'