Add tags

blog/migrations/0006_blogpagetag_blogpage_tags.py

@@ -0,0 +1,61 @@
+# Generated by Django 4.2.6 on 2023-10-17 18:39
+
+from django.db import migrations, models
+import django.db.models.deletion
+import modelcluster.contrib.taggit
+import modelcluster.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("taggit", "0005_auto_20220424_2025"),
+        ("blog", "0005_blogpage_authors"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="BlogPageTag",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                (
+                    "content_object",
+                    modelcluster.fields.ParentalKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="tagged_items",
+                        to="blog.blogpage",
+                    ),
+                ),
+                (
+                    "tag",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="%(app_label)s_%(class)s_items",
+                        to="taggit.tag",
+                    ),
+                ),
+            ],
+            options={
+                "abstract": False,
+            },
+        ),
+        migrations.AddField(
+            model_name="blogpage",
+            name="tags",
+            field=modelcluster.contrib.taggit.ClusterTaggableManager(
+                blank=True,
+                help_text="A comma-separated list of tags.",
+                through="blog.BlogPageTag",
+                to="taggit.Tag",
+                verbose_name="Tags",
+            ),
+        ),
+    ]

blog/migrations/0007_blogtagindexpage.py

@@ -0,0 +1,35 @@
+# Generated by Django 4.2.6 on 2023-10-17 18:43
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("wagtailcore", "0089_log_entry_data_json_null_to_object"),
+        ("blog", "0006_blogpagetag_blogpage_tags"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="BlogTagIndexPage",
+            fields=[
+                (
+                    "page_ptr",
+                    models.OneToOneField(
+                        auto_created=True,
+                        on_delete=django.db.models.deletion.CASCADE,
+                        parent_link=True,
+                        primary_key=True,
+                        serialize=False,
+                        to="wagtailcore.page",
+                    ),
+                ),
+            ],
+            options={
+                "abstract": False,
+            },
+            bases=("wagtailcore.page",),
+        ),
+    ]

blog/models.py

@@ -1,6 +1,8 @@
 from django import forms
 from django.db import models
+from modelcluster.contrib.taggit import ClusterTaggableManager
 from modelcluster.fields import ParentalKey, ParentalManyToManyField
+from taggit.models import TaggedItemBase
 from wagtail.admin.panels import FieldPanel, InlinePanel, MultiFieldPanel
 from wagtail.fields import RichTextField
 from wagtail.models import Page, Orderable
@@ -22,11 +24,29 @@ class BlogIndexPage(Page):
         return context
 
 
+class BlogPageTag(TaggedItemBase):
+    content_object = ParentalKey(
+        'BlogPage',
+        related_name='tagged_items',
+        on_delete=models.CASCADE,
+    )
+
+
+class BlogTagIndexPage(Page):
+    def get_context(self, request):
+        tag = request.GET.get('tag')
+        blogpages = BlogPage.objects.filter(tags__name=tag)
+        context = super().get_context(request)
+        context['blogpages'] = blogpages
+        return context
+
+
 class BlogPage(Page):
     date = models.DateField("Post date")
     intro = models.CharField(max_length=250)
     body = RichTextField(blank=True)
     authors = ParentalManyToManyField('blog.Author', blank=True)
+    tags = ClusterTaggableManager(through=BlogPageTag, blank=True)
 
     def main_image(self):
         gallery_item = self.gallery_images.first()
@@ -44,6 +64,7 @@ class BlogPage(Page):
         MultiFieldPanel([
             FieldPanel('date'),
             FieldPanel('authors', widget=forms.CheckboxSelectMultiple),
+            FieldPanel('tags'),
         ], heading='Blog information'),
         FieldPanel('date'),
         FieldPanel('intro'),

blog/templates/blog/blog_page.html

@@ -35,4 +35,14 @@
 
     <p><a href="{{ page.get_parent.url }}">Return to blog</a></p>
 
+    {% with tags=page.tags.all %}
+     {% if tags %}
+      <div class="tags">
+       <h3>Tags</h3>
+       {% for tag in tags %}
+        <a href="{% slugurl 'tags' %}?tag={{ tag }}"><button type="button">{{ tag }}</button></a>
+       {% endfor %}
+      </div>
+     {% endif %}
+    {% endwith %}
 {% endblock %}

blog/templates/blog/blog_tag_index_page.html

@@ -0,0 +1,17 @@
+{% extends "base.html" %}
+{% load wagtailcore_tags %}
+
+{% block content %}
+ {% if request.GET.tag %}
+  <h4>Showing pages tagged "{{ request.GET.tag }}"</h4>
+ {% endif %}
+
+ {% for blogpage in blogpages %}
+  <p>
+   <strong><a href="{% pageurl blogpage %}">{{ blogpage.title }}</a></strong><br />
+   <small>Revised: {{ blogpage.latest_revision_created_at }}</small><br />
+  </p>
+ {% empty %}
+  No pages found with that tag.
+ {% endfor %}
+{% endblock %}