mirror of
https://github.com/jazzband/django-categories.git
synced 2026-03-16 22:30:24 +00:00
151 lines
4.7 KiB
Python
151 lines
4.7 KiB
Python
from functools import reduce
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from django.contrib.contenttypes.models import ContentType
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from django.core.files.images import get_image_dimensions
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from django.db import models
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from django.urls import reverse
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from django.utils.encoding import force_text
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try:
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from django.contrib.contenttypes.fields import GenericForeignKey
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except ImportError:
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from django.contrib.contenttypes.generic import GenericForeignKey
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from django.core.files.storage import get_storage_class
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from django.utils.translation import ugettext_lazy as _
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from .base import CategoryBase
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from .settings import (
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RELATION_MODELS,
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RELATIONS,
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THUMBNAIL_STORAGE,
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THUMBNAIL_UPLOAD_PATH,
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)
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STORAGE = get_storage_class(THUMBNAIL_STORAGE)
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class Category(CategoryBase):
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thumbnail = models.FileField(
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upload_to=THUMBNAIL_UPLOAD_PATH,
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null=True,
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blank=True,
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storage=STORAGE(),
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)
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thumbnail_width = models.IntegerField(blank=True, null=True)
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thumbnail_height = models.IntegerField(blank=True, null=True)
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order = models.IntegerField(default=0)
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alternate_title = models.CharField(
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blank=True, default="", max_length=100, help_text="An alternative title to use on pages with this category."
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)
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alternate_url = models.CharField(
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blank=True,
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max_length=200,
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help_text="An alternative URL to use instead of the one derived from " "the category hierarchy.",
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)
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description = models.TextField(blank=True, null=True)
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meta_keywords = models.CharField(
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blank=True, default="", max_length=255, help_text="Comma-separated keywords for search engines."
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)
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meta_extra = models.TextField(
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blank=True, default="", help_text="(Advanced) Any additional HTML to be placed verbatim " "in the <head>"
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)
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@property
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def short_title(self):
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return self.name
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def get_absolute_url(self):
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"""Return a path"""
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from django.urls import NoReverseMatch
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if self.alternate_url:
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return self.alternate_url
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try:
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prefix = reverse("categories_tree_list")
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except NoReverseMatch:
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prefix = "/"
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ancestors = list(self.get_ancestors()) + [
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self,
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]
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return prefix + "/".join([force_text(i.slug) for i in ancestors]) + "/"
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if RELATION_MODELS:
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def get_related_content_type(self, content_type):
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"""
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Get all related items of the specified content type
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"""
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return self.categoryrelation_set.filter(content_type__name=content_type)
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def get_relation_type(self, relation_type):
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"""
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Get all relations of the specified relation type
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"""
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return self.categoryrelation_set.filter(relation_type=relation_type)
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def save(self, *args, **kwargs):
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if self.thumbnail:
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width, height = get_image_dimensions(self.thumbnail.file)
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else:
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width, height = None, None
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self.thumbnail_width = width
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self.thumbnail_height = height
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super(Category, self).save(*args, **kwargs)
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class Meta(CategoryBase.Meta):
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verbose_name = _("category")
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verbose_name_plural = _("categories")
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class MPTTMeta:
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order_insertion_by = ("order", "name")
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if RELATIONS:
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CATEGORY_RELATION_LIMITS = reduce(lambda x, y: x | y, RELATIONS)
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else:
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CATEGORY_RELATION_LIMITS = []
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class CategoryRelationManager(models.Manager):
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def get_content_type(self, content_type):
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"""
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Get all the items of the given content type related to this item.
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"""
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qs = self.get_queryset()
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return qs.filter(content_type__name=content_type)
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def get_relation_type(self, relation_type):
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"""
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Get all the items of the given relationship type related to this item.
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"""
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qs = self.get_queryset()
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return qs.filter(relation_type=relation_type)
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class CategoryRelation(models.Model):
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"""Related category item"""
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category = models.ForeignKey(Category, verbose_name=_("category"), on_delete=models.CASCADE)
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content_type = models.ForeignKey(
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ContentType,
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on_delete=models.CASCADE,
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limit_choices_to=CATEGORY_RELATION_LIMITS,
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verbose_name=_("content type"),
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)
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object_id = models.PositiveIntegerField(verbose_name=_("object id"))
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content_object = GenericForeignKey("content_type", "object_id")
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relation_type = models.CharField(
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verbose_name=_("relation type"),
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max_length=200,
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blank=True,
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null=True,
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help_text=_("A generic text field to tag a relation, like 'leadphoto'."),
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)
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objects = CategoryRelationManager()
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def __unicode__(self):
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return "CategoryRelation"
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