mirror of
https://github.com/pacnpal/thrillwiki_django_no_react.git
synced 2025-12-20 15:31:08 -05:00
93 lines
3.3 KiB
Python
93 lines
3.3 KiB
Python
from django.db import models
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.contrib.contenttypes.fields import GenericForeignKey
|
|
from django.conf import settings
|
|
from typing import Any, Dict, Optional
|
|
from django.db.models import QuerySet
|
|
|
|
class DiffMixin:
|
|
"""Mixin to add diffing capabilities to models"""
|
|
|
|
def get_prev_record(self) -> Optional[Any]:
|
|
"""Get the previous record for this instance"""
|
|
try:
|
|
return type(self).objects.filter(
|
|
pgh_created_at__lt=self.pgh_created_at,
|
|
pgh_obj_id=self.pgh_obj_id
|
|
).order_by('-pgh_created_at').first()
|
|
except (AttributeError, TypeError):
|
|
return None
|
|
|
|
def diff_against_previous(self) -> Dict:
|
|
"""Compare this record against the previous one"""
|
|
prev_record = self.get_prev_record()
|
|
if not prev_record:
|
|
return {}
|
|
|
|
skip_fields = {
|
|
'pgh_id', 'pgh_created_at', 'pgh_label',
|
|
'pgh_obj_id', 'pgh_context_id', '_state',
|
|
'created_at', 'updated_at'
|
|
}
|
|
|
|
changes = {}
|
|
for field, value in self.__dict__.items():
|
|
# Skip internal fields and those we don't want to track
|
|
if field.startswith('_') or field in skip_fields or field.endswith('_id'):
|
|
continue
|
|
|
|
try:
|
|
old_value = getattr(prev_record, field)
|
|
new_value = value
|
|
if old_value != new_value:
|
|
changes[field] = {
|
|
"old": str(old_value) if old_value is not None else "None",
|
|
"new": str(new_value) if new_value is not None else "None"
|
|
}
|
|
except AttributeError:
|
|
continue
|
|
|
|
return changes
|
|
|
|
class TrackedModel(models.Model):
|
|
"""Abstract base class for models that need history tracking"""
|
|
created_at = models.DateTimeField(auto_now_add=True)
|
|
updated_at = models.DateTimeField(auto_now=True)
|
|
|
|
class Meta:
|
|
abstract = True
|
|
|
|
def get_history(self) -> QuerySet:
|
|
"""Get all history records for this instance in chronological order"""
|
|
event_model = self.events.model # pghistory provides this automatically
|
|
if event_model:
|
|
return event_model.objects.filter(
|
|
pgh_obj_id=self.pk
|
|
).order_by('-pgh_created_at')
|
|
return self.__class__.objects.none()
|
|
|
|
class HistoricalSlug(models.Model):
|
|
"""Track historical slugs for models"""
|
|
content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
|
|
object_id = models.PositiveIntegerField()
|
|
content_object = GenericForeignKey('content_type', 'object_id')
|
|
slug = models.SlugField(max_length=255)
|
|
created_at = models.DateTimeField(auto_now_add=True)
|
|
user = models.ForeignKey(
|
|
settings.AUTH_USER_MODEL,
|
|
null=True,
|
|
blank=True,
|
|
on_delete=models.SET_NULL,
|
|
related_name='historical_slugs'
|
|
)
|
|
|
|
class Meta:
|
|
unique_together = ('content_type', 'slug')
|
|
indexes = [
|
|
models.Index(fields=['content_type', 'object_id']),
|
|
models.Index(fields=['slug']),
|
|
]
|
|
|
|
def __str__(self) -> str:
|
|
return f"{self.content_type} - {self.object_id} - {self.slug}"
|