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110 lines
3.3 KiB
110 lines
3.3 KiB
from django.db import models
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from django.utils.translation import gettext_lazy as _
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# 1. Define choices globally so they can be reused
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class StatusColorChoices(models.TextChoices):
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RED = 'red', _('Red')
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GREEN = 'green', _('Green')
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BLUE = 'blue', _('Blue')
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YELLOW = 'yellow', _('Yellow')
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ORANGE = 'orange', _('Orange')
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PURPLE = 'purple', _('Purple')
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GRAY = 'gray', _('Gray')
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# 2. Create the Abstract Mixin
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class ColorPaletteMixin(models.Model):
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"""
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An abstract base class that provides color choice fields
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and hex code properties to any model that inherits it.
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"""
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COLOR_PALETTE = {
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'red': '#D33A3A',
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'green': '#1DAC43',
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'blue': '#5172E1',
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'yellow': '#EDC130',
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'orange': '#E67E22',
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'purple': '#7C5CC4',
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'gray': '#374151',
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}
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color = models.CharField(
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max_length=20,
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choices=StatusColorChoices.choices,
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verbose_name=_('color'),
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default=StatusColorChoices.GRAY
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)
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class Meta:
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abstract = True
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@property
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def main_color_code(self):
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return self.COLOR_PALETTE.get(self.color, '#000000')
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from django.utils.text import slugify
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from django.http import HttpResponsePermanentRedirect
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from django.urls import reverse
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class LowercaseSlugMixin(models.Model):
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"""
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Mixin to automatically generate a lowercase, unicode-supporting unique slug
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from a source field (default: 'title') on save.
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"""
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slug_source_field = 'title'
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class Meta:
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abstract = True
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def save(self, *args, **kwargs):
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from utils.slug import build_slug_for_instance
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build_slug_for_instance(self, source_field=self.slug_source_field)
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super().save(*args, **kwargs)
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class CanonicalSlugViewSetMixin:
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"""
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Mixin for DRF Views/ViewSets to enforce lowercase slugs and redirect with 301.
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"""
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def dispatch(self, request, *args, **kwargs):
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if request.method == 'GET':
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slug = kwargs.get('slug')
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if slug and any(char.isupper() for char in slug):
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resolved = request.resolver_match
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new_kwargs = {**resolved.kwargs, 'slug': slug.lower()}
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# Reconstruct path using reverse
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new_path = reverse(resolved.view_name, args=resolved.args, kwargs=new_kwargs)
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# Ensure trailing slash
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if not new_path.endswith('/'):
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new_path += '/'
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# Append query parameters if any
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query_string = request.META.get('QUERY_STRING')
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if query_string:
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new_path = f"{new_path}?{query_string}"
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return HttpResponsePermanentRedirect(new_path)
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return super().dispatch(request, *args, **kwargs)
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from utils.exceptions import ResourceGone
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class Gone410ViewMixin:
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"""
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Mixin for DRF detail Views/ViewSets to return 410 Gone instead of 404
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for inactive/soft-deleted records.
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"""
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active_field_name = 'status'
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active_expected_value = True
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def get_object(self):
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obj = super().get_object()
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active_val = getattr(obj, self.active_field_name, None)
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if active_val != self.active_expected_value:
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raise ResourceGone()
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return obj
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