From 85357054c8ae74ed8b4adab9b2037e7e9b5dac0f Mon Sep 17 00:00:00 2001
From: alfonso <alfareiza@gmail.com>
Date: Wed, 10 Nov 2021 18:26:52 -0300
Subject: [PATCH 1/4] =?UTF-8?q?usando=20page=5Fobj=20que=20=C3=A9=20pasado?=
 =?UTF-8?q?=20pela=20Listview?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 mysite/blog/templates/blog/post/list.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mysite/blog/templates/blog/post/list.html b/mysite/blog/templates/blog/post/list.html
index c075af6..2bdb744 100644
--- a/mysite/blog/templates/blog/post/list.html
+++ b/mysite/blog/templates/blog/post/list.html
@@ -15,5 +15,5 @@ <h2>
         </p>
         {{ post.body|truncatewords:30|linebreaks }}
     {% endfor %}
-    {% include "../pagination.html" with page=posts %}
+    {% include "../pagination.html" with page=page_obj %}
 {% endblock %}
\ No newline at end of file

From 1b7cfb9e110f225a1e75e28173b06eace282e760 Mon Sep 17 00:00:00 2001
From: alfonso <alfareiza@gmail.com>
Date: Sat, 13 Nov 2021 15:26:34 -0500
Subject: [PATCH 2/4] Feature: tags nos posts

Modelagem para tags

Mostrando tags do post

Mostrando tags por post

URL para exibir post por tags

Tratamento para aceitar tags e filtrar caso seja requesitado

app taggit adicionado

lib django-taggit instalada
---
 .../migrations/0003_auto_20211113_1857.py     | 24 +++++++++++++++++++
 mysite/blog/models.py                         |  2 ++
 mysite/blog/templates/blog/post/detail.html   |  1 +
 mysite/blog/templates/blog/post/list.html     | 13 +++++++++-
 mysite/blog/urls.py                           | 10 ++++++--
 mysite/blog/views.py                          | 14 ++++++++---
 mysite/settings.py                            |  3 ++-
 requirements.txt                              |  6 +++++
 8 files changed, 66 insertions(+), 7 deletions(-)
 create mode 100644 mysite/blog/migrations/0003_auto_20211113_1857.py
 create mode 100644 requirements.txt

diff --git a/mysite/blog/migrations/0003_auto_20211113_1857.py b/mysite/blog/migrations/0003_auto_20211113_1857.py
new file mode 100644
index 0000000..cc3afb2
--- /dev/null
+++ b/mysite/blog/migrations/0003_auto_20211113_1857.py
@@ -0,0 +1,24 @@
+# Generated by Django 3.2.9 on 2021-11-13 18:57
+
+from django.db import migrations
+import taggit.managers
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('taggit', '0003_taggeditem_add_unique_index'),
+        ('blog', '0002_comment'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='comment',
+            options={'ordering': ('-created',)},
+        ),
+        migrations.AddField(
+            model_name='post',
+            name='tags',
+            field=taggit.managers.TaggableManager(help_text='A comma-separated list of tags.', through='taggit.TaggedItem', to='taggit.Tag', verbose_name='Tags'),
+        ),
+    ]
diff --git a/mysite/blog/models.py b/mysite/blog/models.py
index e0bc2b4..47a22f3 100644
--- a/mysite/blog/models.py
+++ b/mysite/blog/models.py
@@ -2,6 +2,7 @@
 from django.db import models
 from django.urls import reverse
 from django.utils import timezone
+from taggit.managers import TaggableManager
 
 
 class PublishedManager(models.Manager):
@@ -24,6 +25,7 @@ class Post(models.Model):
     status = models.CharField(max_length=10, choices=STATUS_CHOICES, default='draft')
     objects = models.Manager()
     published = PublishedManager()
+    tags = TaggableManager()
 
     def get_absolute_url(self):
         return reverse('blog:post_detail',
diff --git a/mysite/blog/templates/blog/post/detail.html b/mysite/blog/templates/blog/post/detail.html
index 7c57f26..f6c3167 100644
--- a/mysite/blog/templates/blog/post/detail.html
+++ b/mysite/blog/templates/blog/post/detail.html
@@ -13,6 +13,7 @@ <h1> {{ post.title }}</h1>
         <a href="{% url 'blog:post_share' post.id %}">
             Share this post
         </a>
+        <p class="tags">Tags: {{ post.tags.all|join:", " }}</p>
     </p>
     {% with comments.count as total_comments %}
     <h2>
diff --git a/mysite/blog/templates/blog/post/list.html b/mysite/blog/templates/blog/post/list.html
index 2bdb744..2b0ffdf 100644
--- a/mysite/blog/templates/blog/post/list.html
+++ b/mysite/blog/templates/blog/post/list.html
@@ -4,16 +4,27 @@
 
 {% block content %}
     <h1>My Blog</h1>
+    {% if tag %}
+    <h2>Posts tagged with "{{ tag.name }}"</h2>
+    {% endif %}
     {% for post in posts %}
         <h2>
             <a href="{{ post.get_absolute_url }}">
                 {{ post.title }}
             </a>
         </h2>
+        <p class="tags">
+        Tags:
+        {% for tag in post.tags.all %}
+            <a href="{% url 'blog:post_list_by_tag' tag.slug %}">{{ tag.name }}</a>
+            {% if not.foorloop.last %}, {% endif %}
+        {% endfor %}
+        </p>
         <p class="date">
             Published {{ post.publish }} by {{ post.author }}
         </p>
         {{ post.body|truncatewords:30|linebreaks }}
+        <hr>
     {% endfor %}
-    {% include "../pagination.html" with page=page_obj %}
+    {% include "../pagination.html" with page=posts %}
 {% endblock %}
\ No newline at end of file
diff --git a/mysite/blog/urls.py b/mysite/blog/urls.py
index 66193c7..4b01e29 100644
--- a/mysite/blog/urls.py
+++ b/mysite/blog/urls.py
@@ -5,8 +5,14 @@
 app_name = 'blog'
 
 urlpatterns = [
-    # path('', views.post_list, name='post_list'),
-    path('', views.PostListView.as_view(), name='post_list'),
+    # Listar todos os posts
+    path('', views.post_list, name='post_list'),
+    # Listar posts baseado num tag
+    path('tag/<slug:tag_slug>/', views.post_list, name='post_list_by_tag'),
+    # path('', views.PostListView.as_view(), name='post_list'),
+    # Detalhe de uma view
     path('<int:year>/<int:month>/<int:day>/<slug:post>/', views.post_detail, name='post_detail'),
+    # Compartilhar view
     path('<int:post_id>/share/', views.post_share, name='post_share')
+
 ]
diff --git a/mysite/blog/views.py b/mysite/blog/views.py
index 4485c3a..57e38b0 100644
--- a/mysite/blog/views.py
+++ b/mysite/blog/views.py
@@ -1,8 +1,8 @@
 from django.core.mail import send_mail
 from django.core.paginator import Paginator, PageNotAnInteger, EmptyPage
-from django.http import HttpResponseRedirect
 from django.shortcuts import render, get_object_or_404, redirect
 from django.views.generic import ListView
+from taggit.models import Tag
 
 from mysite.blog.forms import EmailPostForm, CommentForm
 from mysite.blog.models import Post
@@ -15,8 +15,16 @@ class PostListView(ListView):
     template_name = 'blog/post/list.html'  # O padrão é blog/list.html
 
 
-def post_list(request):
+def post_list(request, tag_slug=None):
     object_list = Post.published.all()
+    tag = None
+    if tag_slug:
+        # A seguinte linha retorna o modelo obtido no banco a partir do tag_slug
+        tag = get_object_or_404(Tag, slug=tag_slug)
+        # De todos os posts publicados, filtra segundo a tag (objeto obtido anteriormente)
+        # Filtragem de um modelo baseado em outro
+        object_list = object_list.filter(tags__in=[tag])
+
     paginator = Paginator(object_list, 3)  # tres postagens em cada página
     page = request.GET.get('page')
     try:
@@ -27,7 +35,7 @@ def post_list(request):
     except EmptyPage:
         # Se a página estiver fora fo intervalo, exibe a última página de resultados
         posts = paginator.page(paginator.num_pages)
-    return render(request, 'blog/post/list.html', {'posts': posts})
+    return render(request, 'blog/post/list.html', {'posts': posts, 'page': page, 'tag': tag})
 
 
 def post_detail(request, year, month, day, post):
diff --git a/mysite/settings.py b/mysite/settings.py
index 1343db2..aa0995a 100644
--- a/mysite/settings.py
+++ b/mysite/settings.py
@@ -38,7 +38,8 @@
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
-    'mysite.blog.apps.BlogConfig'
+    'mysite.blog.apps.BlogConfig',
+    'taggit'
 ]
 
 MIDDLEWARE = [
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..9f172b9
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,6 @@
+asgiref==3.4.1
+Django==3.2.9
+django-taggit==1.5.1
+python-decouple==3.5
+pytz==2021.3
+sqlparse==0.4.2

From 5278be8258c20485de8b36818f26ad256210ed52 Mon Sep 17 00:00:00 2001
From: alfonso <alfareiza@gmail.com>
Date: Sat, 13 Nov 2021 18:23:12 -0500
Subject: [PATCH 3/4] Exibindo posts similares (com o mesmo tag)

---
 mysite/blog/templates/blog/post/detail.html | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/mysite/blog/templates/blog/post/detail.html b/mysite/blog/templates/blog/post/detail.html
index f6c3167..9dbc499 100644
--- a/mysite/blog/templates/blog/post/detail.html
+++ b/mysite/blog/templates/blog/post/detail.html
@@ -13,8 +13,22 @@ <h1> {{ post.title }}</h1>
         <a href="{% url 'blog:post_share' post.id %}">
             Share this post
         </a>
-        <p class="tags">Tags: {{ post.tags.all|join:", " }}</p>
+        <p class="tags">
+        Tags:
+        {% for tag in post.tags.all %}
+            <a href="{% url 'blog:post_list_by_tag' tag.slug %}">{{ tag.name }}</a>
+            {% if not.foorloop.last %}, {% endif %}
+        {% endfor %}
+        </p>
     </p>
+    <h2>Similar Posts</h2>
+    {% for post in similar_posts %}
+        <p>
+            <a href="{{ post.get_absolute_url }}">{{ post.title }}</a>
+        </p>
+    {% empty %}
+        There is no similar posts yet.
+    {% endfor %}
     {% with comments.count as total_comments %}
     <h2>
         {{ total_comments }} comment{{total_comments|pluralize }}

From 04f1fe64ab115faaee6cb60f44dec8e5519c7361 Mon Sep 17 00:00:00 2001
From: alfonso <alfareiza@gmail.com>
Date: Sat, 13 Nov 2021 18:23:40 -0500
Subject: [PATCH 4/4] criado contexto de posts similares

---
 mysite/blog/views.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/mysite/blog/views.py b/mysite/blog/views.py
index 57e38b0..1d70b6a 100644
--- a/mysite/blog/views.py
+++ b/mysite/blog/views.py
@@ -1,5 +1,6 @@
 from django.core.mail import send_mail
 from django.core.paginator import Paginator, PageNotAnInteger, EmptyPage
+from django.db.models import Count
 from django.shortcuts import render, get_object_or_404, redirect
 from django.views.generic import ListView
 from taggit.models import Tag
@@ -57,9 +58,20 @@ def post_detail(request, year, month, day, post):
     else:
         comment_form = CommentForm()
 
+    # Pag. 87
+    # Lista de id de tags do post atual. Ex.: <QuerySet [3, 5]>
+    post_tags_ids = post.tags.values_list('id', flat=True)
+
+    # Lista de postagens semelhantes Ex. :<QuerySet [<Post:  __str__ do model>, <Post: __str__ do model >]>
+    similar_posts = Post.published.filter(tags__in=post_tags_ids).exclude(id=post.id)
+
+    # Lista dos 4 primeiros objetos tipo posts baseado no atributo criado -same_tags-
+    similar_posts = similar_posts.annotate(same_tags=Count('tags')).order_by('-same_tags', '-publish')[:4]
+
     return render(request, 'blog/post/detail.html',
                   {'post': post, 'comments': comments,
-                   'new_comment': new_comment, 'comment_form': comment_form})
+                   'new_comment': new_comment, 'comment_form': comment_form,
+                   'similar_posts': similar_posts})
 
 
 def post_share(request, post_id):