add category views for each type of ride, add ride designers

designers/admin.py

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+from django.contrib import admin
+from simple_history.admin import SimpleHistoryAdmin
+from .models import Designer
+
+@admin.register(Designer)
+class DesignerAdmin(SimpleHistoryAdmin):
+    list_display = ('name', 'headquarters', 'founded_date', 'website')
+    search_fields = ('name', 'headquarters')
+    list_filter = ('founded_date',)
+    prepopulated_fields = {'slug': ('name',)}

designers/apps.py

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+from django.apps import AppConfig
+
+
+class DesignersConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "designers"

designers/migrations/0001_initial.py

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+# Generated by Django 5.1.2 on 2024-11-04 00:28
+
+import django.db.models.deletion
+import simple_history.models
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="Designer",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("name", models.CharField(max_length=255)),
+                ("slug", models.SlugField(max_length=255, unique=True)),
+                ("description", models.TextField(blank=True)),
+                ("website", models.URLField(blank=True)),
+                ("founded_date", models.DateField(blank=True, null=True)),
+                ("headquarters", models.CharField(blank=True, max_length=255)),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                "ordering": ["name"],
+            },
+        ),
+        migrations.CreateModel(
+            name="HistoricalDesigner",
+            fields=[
+                (
+                    "id",
+                    models.BigIntegerField(
+                        auto_created=True, blank=True, db_index=True, verbose_name="ID"
+                    ),
+                ),
+                ("name", models.CharField(max_length=255)),
+                ("slug", models.SlugField(max_length=255)),
+                ("description", models.TextField(blank=True)),
+                ("website", models.URLField(blank=True)),
+                ("founded_date", models.DateField(blank=True, null=True)),
+                ("headquarters", models.CharField(blank=True, max_length=255)),
+                ("created_at", models.DateTimeField(blank=True, editable=False)),
+                ("updated_at", models.DateTimeField(blank=True, editable=False)),
+                ("history_id", models.AutoField(primary_key=True, serialize=False)),
+                ("history_date", models.DateTimeField(db_index=True)),
+                ("history_change_reason", models.CharField(max_length=100, null=True)),
+                (
+                    "history_type",
+                    models.CharField(
+                        choices=[("+", "Created"), ("~", "Changed"), ("-", "Deleted")],
+                        max_length=1,
+                    ),
+                ),
+                (
+                    "history_user",
+                    models.ForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        related_name="+",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "historical designer",
+                "verbose_name_plural": "historical designers",
+                "ordering": ("-history_date", "-history_id"),
+                "get_latest_by": ("history_date", "history_id"),
+            },
+            bases=(simple_history.models.HistoricalChanges, models.Model),
+        ),
+    ]

designers/models.py

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+from django.db import models
+from django.utils.text import slugify
+from simple_history.models import HistoricalRecords
+
+class Designer(models.Model):
+    name = models.CharField(max_length=255)
+    slug = models.SlugField(max_length=255, unique=True)
+    description = models.TextField(blank=True)
+    website = models.URLField(blank=True)
+    founded_date = models.DateField(null=True, blank=True)
+    headquarters = models.CharField(max_length=255, blank=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+    history = HistoricalRecords()
+
+    class Meta:
+        ordering = ['name']
+
+    def __str__(self):
+        return self.name
+
+    def save(self, *args, **kwargs):
+        if not self.slug:
+            self.slug = slugify(self.name)
+        super().save(*args, **kwargs)
+
+    @classmethod
+    def get_by_slug(cls, slug):
+        """Get designer by current or historical slug"""
+        try:
+            return cls.objects.get(slug=slug), False
+        except cls.DoesNotExist:
+            # Check historical slugs
+            history = cls.history.filter(slug=slug).order_by('-history_date').first()
+            if history:
+                return cls.objects.get(id=history.id), True
+            raise cls.DoesNotExist("No designer found with this slug")

designers/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

designers/urls.py

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+from django.urls import path
+from . import views
+
+app_name = 'designers'
+
+urlpatterns = [
+    path('<slug:slug>/', views.DesignerDetailView.as_view(), name='designer_detail'),
+]

designers/views.py

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+from django.views.generic import DetailView
+from .models import Designer
+from django.db.models import Count
+
+class DesignerDetailView(DetailView):
+    model = Designer
+    template_name = 'designers/designer_detail.html'
+    context_object_name = 'designer'
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        # Get all rides by this designer
+        context['rides'] = self.object.rides.select_related(
+            'park', 
+            'manufacturer', 
+            'coaster_stats'
+        ).order_by('-opening_date')
+        
+        # Get stats
+        context['stats'] = {
+            'total_rides': self.object.rides.count(),
+            'total_parks': self.object.rides.values('park').distinct().count(),
+            'total_coasters': self.object.rides.filter(category='RC').count(),
+            'total_countries': self.object.rides.values(
+                'park__location__country'
+            ).distinct().count(),
+        }
+        
+        return context