Lesson 50

articles/forms.py

 from django.forms.models import ModelForm
-from articles.models import Article, Author
+from articles.models import Article, Author, Comment
 
 
 class AuthorForm(ModelForm):
     class Meta:
         model = Author
         fields = ("name",)
+
+
+class CommentForm(ModelForm):
+    class Meta:
+        model = Comment
+        fields = ("text", "author")

articles/migrations/0004_auto_20210812_1418.py

+# Generated by Django 3.2.6 on 2021-08-12 14:18
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('articles', '0003_comment'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Tag',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=31, verbose_name='Тег')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Время создания')),
+            ],
+        ),
+        migrations.AlterField(
+            model_name='author',
+            name='name',
+            field=models.CharField(max_length=50, verbose_name='Автор'),
+        ),
+        migrations.CreateModel(
+            name='ArticleTag',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('article', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='article_tags', to='articles.article', verbose_name='Статья')),
+                ('tag', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='tag_articles', to='articles.tag', verbose_name='Тег')),
+            ],
+        ),
+        migrations.AddField(
+            model_name='article',
+            name='tags',
+            field=models.ManyToManyField(blank=True, related_name='tags', through='articles.ArticleTag', to='articles.Tag'),
+        ),
+    ]

articles/migrations/0005_alter_article_tags.py

+# Generated by Django 3.2.6 on 2021-08-12 14:53
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('articles', '0004_auto_20210812_1418'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='article',
+            name='tags',
+            field=models.ManyToManyField(blank=True, related_name='articles', through='articles.ArticleTag', to='articles.Tag'),
+        ),
+    ]

articles/migrations/0006_auto_20210812_1509.py

+# Generated by Django 3.2.6 on 2021-08-12 15:09
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('articles', '0005_alter_article_tags'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='article',
+            name='tags',
+        ),
+        migrations.AddField(
+            model_name='article',
+            name='tags_old',
+            field=models.ManyToManyField(blank=True, related_name='articles', to='articles.Tag'),
+        ),
+    ]

articles/migrations/0007_auto_20210812_1511.py

+# Generated by Django 3.2.6 on 2021-08-12 15:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('articles', '0006_auto_20210812_1509'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='article',
+            name='tags',
+            field=models.ManyToManyField(blank=True, related_name='articles', to='articles.Tag'),
+        ),
+        migrations.AlterField(
+            model_name='article',
+            name='tags_old',
+            field=models.ManyToManyField(blank=True, related_name='articles_old', to='articles.Tag'),
+        ),
+    ]

articles/migrations/0008_remove_article_tags_old.py

+# Generated by Django 3.2.6 on 2021-08-12 15:20
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('articles', '0007_auto_20210812_1511'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='article',
+            name='tags_old',
+        ),
+    ]

articles/migrations/0009_article_tags_old.py

+# Generated by Django 3.2.6 on 2021-08-12 15:20
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('articles', '0008_remove_article_tags_old'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='article',
+            name='tags_old',
+            field=models.ManyToManyField(blank=True, related_name='articles_old', through='articles.ArticleTag', to='articles.Tag'),
+        ),
+    ]

articles/migrations/0010_auto_20210812_1520.py

+# Generated by Django 3.2.6 on 2021-08-12 15:20
+
+from django.db import migrations
+
+
+def transfer_tags(apps, schema_editor):
+    Article = apps.get_model('articles.Article')
+    for article in Article.objects.all():
+        article.tags.set(article.tags_old.all())
+
+
+def rollback_transfer(apps, schema_editor):
+    Article = apps.get_model('articles.Article')
+    for article in Article.objects.all():
+        article.tags_old.set(article.tags.all())
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('articles', '0009_article_tags_old'),
+    ]
+
+    operations = [
+        migrations.RunPython(transfer_tags, rollback_transfer)
+    ]

articles/migrations/0011_auto_20210812_1522.py

+# Generated by Django 3.2.6 on 2021-08-12 15:22
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('articles', '0010_auto_20210812_1520'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='article',
+            name='tags_old',
+        ),
+        migrations.DeleteModel(
+            name='ArticleTag',
+        ),
+    ]

articles/models.py

@@ -4,6 +4,9 @@ from django.db import models
 class Author(models.Model):
     name = models.CharField(max_length=50, null=False, verbose_name="Автор")
 
+    def __str__(self):
+        return self.name
+
 
 class Article(models.Model):
     title = models.CharField(max_length=250, null=False)
@@ -12,6 +15,18 @@ class Article(models.Model):
         "articles.Author",
         on_delete=models.SET_NULL,
         null=True, related_name='articles')
+    tags_old = models.ManyToManyField(
+        'articles.Tag',
+        related_name="articles_old",
+        through='articles.ArticleTag',
+        through_fields=('article', 'tag'),
+        blank=True
+    )
+    tags = models.ManyToManyField(
+        'articles.Tag',
+        related_name="articles",
+        blank=True
+    )
 
 
 class Comment(models.Model):
@@ -27,3 +42,30 @@ class Comment(models.Model):
 
     def __str__(self):
         return self.text[:20]
+
+
+class Tag(models.Model):
+    name = models.CharField(max_length=31, verbose_name='Тег')
+    created_at = models.DateTimeField(
+        auto_now_add=True,
+        verbose_name='Время создания'
+    )
+
+    def __str__(self):
+        return self.name
+
+
+class ArticleTag(models.Model):
+    article = models.ForeignKey(
+        'articles.Article',
+        related_name='article_tags',
+        on_delete=models.CASCADE,
+        verbose_name="Статья")
+    tag = models.ForeignKey(
+        'articles.Tag',
+        related_name='tag_articles',
+        on_delete=models.CASCADE,
+        verbose_name="Тег")
+
+    def __str__(self):
+        return f"{self.article} | {self.tag}"

articles/templates/articles/article_list.html

@@ -14,7 +14,7 @@
             {% for article in articles %}
                 <tr>
                   <th scope="row">1</th>
-                  <td>{{ article.title }}</td>
+                  <td><a href="{% url 'article_detail' article.pk %}">{{ article.title }}</a></td>
                   <td>{{ article.author.name }}</td>
                 </tr>
             {% endfor %}

articles/templates/articles/detail.html

+{% extends "base.html" %}
+
+{% block content %}
+    <div class="container">
+        <div>
+            <h3>
+                {{ article.title }}
+            </h3>
+            <p> {{ article.body }} </p>
+            <p> {{ article.author }} </p>
+        </div>
+        <div>
+            <ul>
+            {% for comment in article.comments.all %}
+                <li>Автор: {{comment.author}} </li>
+                <li>Текст: {{comment.text}} </li>
+                <li>Дата создания: {{comment.created_at}} </li>
+            {% endfor %}
+            </ul>
+        </div>
+        <div>
+            <form action="{% url 'add_comment' article.pk %}" method="POST">
+                {% csrf_token %}
+                {{ form.as_p }}
+                <input type="submit"
+                       class="btn btn-success"
+                       value="Оставить комментарий">
+            </form>
+        </div>
+    </div>
+
+{% endblock %}
\ No newline at end of file

articles/urls.py

 from django.urls import path
 from .views import (
     article_list_view,
-    create_author_view,
+    ArticleDetailView, CommentView,
     author_list_view, author_edit_view, author_delete_view, AuthorView
 )
 
@@ -11,6 +11,17 @@ urlpatterns = [
         article_list_view,
         name="article_list"
     ),
+    path(
+        'article/<int:pk>/',
+        ArticleDetailView.as_view(),
+        name="article_detail"
+    ),
+    path(
+        'article/<int:article_pk>/comment/add/',
+        CommentView.as_view(),
+        name="add_comment"
+    ),
+
     path(
         'create/',
         AuthorView.as_view(),

articles/views.py

@@ -2,7 +2,7 @@ from django.shortcuts import render, redirect, get_object_or_404
 from django.views import View
 
 from articles.models import Article, Author
-from .forms import AuthorForm
+from .forms import AuthorForm, CommentForm
 
 
 def article_list_view(request):
@@ -43,6 +43,29 @@ class AuthorView(View):
         return redirect('author_list')
 
 
+class ArticleDetailView(View):
+    def get(self, request, *args, **kwargs):
+        form = CommentForm()
+        return render(request, "articles/detail.html", context={
+            'article': get_object_or_404(Article, pk=kwargs.get("pk")),
+            'form': form
+        })
+
+
+class CommentView(View):
+    def post(self, request, *args, **kwargs):
+        form = CommentForm(request.POST)
+        article_pk = kwargs.get('article_pk')
+        if form.is_valid():
+            article = get_object_or_404(Article, pk=article_pk)
+            article.comments.create(
+                text=request.POST.get("text"),
+                author=request.POST.get("author")
+            )
+
+        return redirect('article_detail', article_pk)
+
+
 def create_author_view(request):
     if request.method == "GET":
         form = AuthorForm()