Added a comment system

Module02/mysite/blog/admin.py

@@ -1,6 +1,5 @@
 from django.contrib import admin
-from .models import Post
-
+from .models import Post, Comment
 
 @admin.register(Post)
 class PostAdmin(admin.ModelAdmin):
@@ -11,3 +10,9 @@ class PostAdmin(admin.ModelAdmin):
     raw_id_fields = ['author']
     date_hierarchy = 'publish'
     ordering = ['status', 'publish']
+
+@admin.register(Comment)
+class CommentAdmin(admin.ModelAdmin):
+    list_display = ['name', 'email', 'post', 'created', 'active']
+    list_filter = ['active', 'created', 'updated']
+    search_fields = ['name', 'email', 'body']

Module02/mysite/blog/forms.py

@@ -1,7 +1,13 @@
 from django import forms
+from .models import Comment
 
 class EmailPostForm(forms.Form):
     name = forms.CharField(max_length=25)
     email = forms.EmailField()
     to = forms.EmailField()
     comments = forms.CharField(required=False, widget=forms.Textarea)
+
+class CommentForm(forms.ModelForm):
+    class Meta:
+        model = Comment
+        fields = ['name', 'email', 'body']

Module02/mysite/blog/migrations/0003_comment.py

@@ -0,0 +1,31 @@
+# Generated by Django 4.2.4 on 2023-08-20 12:32
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('blog', '0002_alter_post_slug'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Comment',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=80)),
+                ('email', models.EmailField(max_length=254)),
+                ('body', models.TextField()),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('updated', models.DateTimeField(auto_now=True)),
+                ('active', models.BooleanField(default=True)),
+                ('post', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='comments', to='blog.post')),
+            ],
+            options={
+                'ordering': ['created'],
+                'indexes': [models.Index(fields=['created'], name='blog_commen_created_0e6ed4_idx')],
+            },
+        ),
+    ]

Module02/mysite/blog/models.py

@@ -35,5 +35,19 @@ def get_absolute_url(self):
             self.slug,
         ])
 
-
+class Comment(models.Model):
+    post = models.ForeignKey(Post, on_delete=models.CASCADE, related_name='comments')
+    name = models.CharField(max_length=80)
+    email = models.EmailField()
+    body = models.TextField()
+    created = models.DateTimeField(auto_now_add=True)
+    updated = models.DateTimeField(auto_now=True)
+    active = models.BooleanField(default=True)
 
+    class Meta:
+        ordering = ['created']
+        indexes = [
+            models.Index(fields=['created']),
+        ]
+    def __str__(self):
+        return f'Comment by {self.name} on {self.post}'

Module02/mysite/blog/templates/blog/post/comment.html

@@ -0,0 +1,10 @@
+{% extends "blog/base.html" %}
+{% block title %}Add a comment{% endblock %}
+{% block content %}
+    {% if comment %}
+        <h2>Your comment has been added.</h2>
+        <p><a href="{{ post.get_absolute_url }}">Back to the post</a></p>
+    {% else %}
+        {% include "blog/post/includes/comment_form.html" %}
+    {% endif %}
+{% endblock %}

Module02/mysite/blog/templates/blog/post/detail.html

@@ -13,4 +13,21 @@ <h1>{{ post.title }}</h1>
             Share this post
         </a>
     </p>
+    {% with comments.count as total_comments %}
+        <h2>
+            {{ total_comments }} comment{{ total_comments|pluralize }}
+        </h2>
+    {% endwith %}
+    {% for comment in comments %}
+        <div class="comment">
+            <p class="info">
+                Comment {{ forloop.counter }} by {{ comment.name }}
+                {{ comment.created }}
+            </p>
+            {{ comment.body|linebreaks }}
+        </div>
+    {% empty %}
+        <p>There are no comments.</p>
+    {% endfor %}
+    {% include "blog/post/includes/comment_form.html" %}
 {% endblock %}

Module02/mysite/blog/templates/blog/post/includes/comment_form.html

@@ -0,0 +1,6 @@
+<h2>Add a new comment</h2>
+<form action="{% url "blog:post_comment" post.id %}" method="post">
+    {{ form.as_p }}
+    {% csrf_token %}
+    <p><input type="submit" value="Add comment"></p>
+</form>

Module02/mysite/blog/urls.py

@@ -8,4 +8,5 @@
     path('', views.PostListView.as_view(), name='post_list'),
     path('<int:year>/<int:month>/<int:day>/<slug:post>/', views.post_detail, name='post_detail'),
     path('<int:post_id>/share/', views.post_share, name='post_share'),
+    path('<int:post_id>/comment/', views.post_comment, name='post_comment'),
 ]

Module02/mysite/blog/views.py

@@ -2,9 +2,9 @@
 from .models import Post
 from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger 
 from django.views.generic import ListView
-from .forms import EmailPostForm
+from .forms import EmailPostForm, CommentForm
 from django.core.mail import send_mail
-
+from django.views.decorators.http import require_POST
 
 # def post_list(request):
 #     post_list = Post.objects.all()
@@ -37,7 +37,11 @@ def post_detail(request, year, month, day, post):
                                 publish__month=month, 
                                 publish__day=day
                             )
-    return render(request, 'blog/post/detail.html', {'post': post})
+    # List of active comments for this post
+    comments = post.comments.filter(active=True)
+    # Form for users to comment
+    form = CommentForm()
+    return render(request, 'blog/post/detail.html', {'post': post, 'comments': comments, 'form': form})
 
 def post_share(request, post_id):
     # Retrieve post by id
@@ -57,3 +61,18 @@ def post_share(request, post_id):
     else:
         form = EmailPostForm()
     return render(request, 'blog/post/share.html', {'post': post, 'form': form, 'sent': sent})
+
+@require_POST
+def post_comment(request, post_id):
+    post = get_object_or_404(Post, id=post_id, status=Post.Status.PUBLISHED)
+    comment = None
+    # A comment was posted
+    form = CommentForm(data=request.POST)
+    if form.is_valid():
+        # Create a Comment object without saving it to the database
+        comment = form.save(commit=False)
+        # Assign the post to the comment
+        comment.post = post
+        # Save the comment to the database
+        comment.save()
+    return render(request, 'blog/post/comment.html', {'post': post, 'form': form, 'comment': comment})