mirror of
https://github.com/pacnpal/thrillwiki_django_no_react.git
synced 2025-12-20 11:51:10 -05:00
93 lines
3.2 KiB
Python
93 lines
3.2 KiB
Python
from django.db import models
|
|
from django.contrib.contenttypes.fields import GenericForeignKey
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.utils.text import slugify
|
|
|
|
class SlugHistory(models.Model):
|
|
"""
|
|
Model for tracking slug changes across all models that use slugs.
|
|
Uses generic relations to work with any model.
|
|
"""
|
|
content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
|
|
object_id = models.CharField(max_length=50) # Using CharField to work with our custom IDs
|
|
content_object = GenericForeignKey('content_type', 'object_id')
|
|
|
|
old_slug = models.SlugField(max_length=200)
|
|
created_at = models.DateTimeField(auto_now_add=True)
|
|
|
|
class Meta:
|
|
indexes = [
|
|
models.Index(fields=['content_type', 'object_id']),
|
|
models.Index(fields=['old_slug']),
|
|
]
|
|
verbose_name_plural = 'Slug histories'
|
|
ordering = ['-created_at']
|
|
|
|
def __str__(self):
|
|
return f"Old slug '{self.old_slug}' for {self.content_object}"
|
|
|
|
class SluggedModel(models.Model):
|
|
"""
|
|
Abstract base model that provides slug functionality with history tracking.
|
|
"""
|
|
name = models.CharField(max_length=200)
|
|
slug = models.SlugField(max_length=200, unique=True)
|
|
|
|
class Meta:
|
|
abstract = True
|
|
|
|
def save(self, *args, **kwargs):
|
|
# Get the current instance from DB if it exists
|
|
if self.pk:
|
|
try:
|
|
old_instance = self.__class__.objects.get(pk=self.pk)
|
|
# If slug has changed, save the old one to history
|
|
if old_instance.slug != self.slug:
|
|
SlugHistory.objects.create(
|
|
content_type=ContentType.objects.get_for_model(self),
|
|
object_id=getattr(self, self.get_id_field_name()),
|
|
old_slug=old_instance.slug
|
|
)
|
|
except self.__class__.DoesNotExist:
|
|
pass
|
|
|
|
# Generate slug if not set
|
|
if not self.slug:
|
|
self.slug = slugify(self.name)
|
|
|
|
super().save(*args, **kwargs)
|
|
|
|
def get_id_field_name(self):
|
|
"""
|
|
Returns the name of the read-only ID field for this model.
|
|
Should be overridden by subclasses.
|
|
"""
|
|
raise NotImplementedError(
|
|
"Subclasses of SluggedModel must implement get_id_field_name()"
|
|
)
|
|
|
|
@classmethod
|
|
def get_by_slug(cls, slug):
|
|
"""
|
|
Get an object by its current or historical slug.
|
|
Returns (object, is_old_slug) tuple.
|
|
"""
|
|
try:
|
|
# Try to get by current slug first
|
|
return cls.objects.get(slug=slug), False
|
|
except cls.DoesNotExist:
|
|
# Try to find in slug history
|
|
history = SlugHistory.objects.filter(
|
|
content_type=ContentType.objects.get_for_model(cls),
|
|
old_slug=slug
|
|
).order_by('-created_at').first()
|
|
|
|
if history:
|
|
return cls.objects.get(
|
|
**{cls.get_id_field_name(): history.object_id}
|
|
), True
|
|
|
|
raise cls.DoesNotExist(
|
|
f"{cls.__name__} with slug '{slug}' does not exist"
|
|
)
|