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

designers/models.py

@@ -0,0 +1,37 @@
+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")