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https://github.com/pacnpal/thrillwiki_django_no_react.git
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62 lines
2.5 KiB
Python
62 lines
2.5 KiB
Python
from typing import Any, Dict, Optional, Type, cast
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from django.shortcuts import redirect
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from django.urls import reverse
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from django.views.generic import DetailView
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from django.views import View
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from django.http import HttpRequest, HttpResponse
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from django.db.models import Model
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class SlugRedirectMixin(View):
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"""
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Mixin that handles redirects for old slugs.
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Requires the model to inherit from SluggedModel and view to inherit from DetailView.
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"""
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model: Optional[Type[Model]] = None
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slug_url_kwarg: str = 'slug'
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object: Optional[Model] = None
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def dispatch(self, request: HttpRequest, *args: Any, **kwargs: Any) -> HttpResponse:
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# Only apply slug redirect logic to DetailViews
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if not isinstance(self, DetailView):
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return super().dispatch(request, *args, **kwargs)
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# Get the object using current or historical slug
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try:
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self.object = self.get_object() # type: ignore
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# Check if we used an old slug
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current_slug = kwargs.get(self.slug_url_kwarg)
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if current_slug and current_slug != getattr(self.object, 'slug', None):
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# Get the URL pattern name from the view
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url_pattern = self.get_redirect_url_pattern()
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# Build kwargs for reverse()
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reverse_kwargs = self.get_redirect_url_kwargs()
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# Redirect to the current slug URL
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return redirect(
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reverse(url_pattern, kwargs=reverse_kwargs),
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permanent=True
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)
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return super().dispatch(request, *args, **kwargs)
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except (AttributeError, Exception) as e: # type: ignore
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if self.model and hasattr(self.model, 'DoesNotExist'):
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if isinstance(e, self.model.DoesNotExist): # type: ignore
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return super().dispatch(request, *args, **kwargs)
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return super().dispatch(request, *args, **kwargs)
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def get_redirect_url_pattern(self) -> str:
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"""
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Get the URL pattern name for redirects.
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Should be overridden by subclasses.
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"""
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raise NotImplementedError(
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"Subclasses must implement get_redirect_url_pattern()"
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)
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def get_redirect_url_kwargs(self) -> Dict[str, Any]:
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"""
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Get the kwargs for reverse() when redirecting.
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Should be overridden by subclasses if they need custom kwargs.
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"""
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if not self.object:
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return {}
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return {self.slug_url_kwarg: getattr(self.object, 'slug', '')}
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