103 lines
3.6 KiB
Python
103 lines
3.6 KiB
Python
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from django.conf import settings
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from django.contrib.contenttypes.fields import GenericForeignKey
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from django.contrib.contenttypes.models import ContentType
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from django.db import models
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from django.db.models import Count
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from django.utils import timezone
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from django.utils.translation import gettext_lazy as _
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from modelcluster.fields import ParentalKey
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from taggit.models import Tag
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# The panels module extends Page with some additional attributes required by
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# wagtail admin (namely, base_form_class and get_edit_handler). Importing this within
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# wagtail.admin.models ensures that this happens in advance of running wagtail.admin's
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# system checks.
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from wagtail.admin import panels # NOQA: F401
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from wagtail.models import Page
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# A dummy model that exists purely to attach the access_admin permission type to, so that it
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# doesn't get identified as a stale content type and removed by the remove_stale_contenttypes
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# management command.
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class Admin(models.Model):
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class Meta:
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default_permissions = [] # don't create the default add / change / delete / view perms
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permissions = [
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("access_admin", _("Can access Wagtail admin")),
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]
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def get_object_usage(obj):
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"""Returns a queryset of pages that link to a particular object"""
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pages = Page.objects.none()
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# get all the relation objects for obj
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relations = [
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f
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for f in type(obj)._meta.get_fields(include_hidden=True)
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if (f.one_to_many or f.one_to_one) and f.auto_created
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]
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for relation in relations:
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related_model = relation.related_model
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# if the relation is between obj and a page, get the page
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if issubclass(related_model, Page):
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pages |= Page.objects.filter(
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id__in=related_model._base_manager.filter(
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**{relation.field.name: obj.id}
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).values_list("id", flat=True)
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)
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else:
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# if the relation is between obj and an object that has a page as a
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# property, return the page
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for f in related_model._meta.fields:
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if isinstance(f, ParentalKey) and issubclass(
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f.remote_field.model, Page
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):
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pages |= Page.objects.filter(
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id__in=related_model._base_manager.filter(
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**{relation.field.name: obj.id}
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).values_list(f.attname, flat=True)
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)
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return pages
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def popular_tags_for_model(model, count=10):
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"""Return a queryset of the most frequently used tags used on this model class"""
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content_type = ContentType.objects.get_for_model(model)
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return (
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Tag.objects.filter(taggit_taggeditem_items__content_type=content_type)
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.annotate(item_count=Count("taggit_taggeditem_items"))
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.order_by("-item_count")[:count]
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)
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class EditingSession(models.Model):
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user = models.ForeignKey(
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settings.AUTH_USER_MODEL,
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on_delete=models.CASCADE,
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related_name="editing_sessions",
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)
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content_type = models.ForeignKey(
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ContentType, on_delete=models.CASCADE, related_name="+"
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)
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object_id = models.CharField(max_length=255)
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content_object = GenericForeignKey(
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"content_type", "object_id", for_concrete_model=False
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)
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last_seen_at = models.DateTimeField()
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is_editing = models.BooleanField(default=False)
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@staticmethod
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def cleanup():
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EditingSession.objects.filter(
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last_seen_at__lt=timezone.now() - timezone.timedelta(hours=1)
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).delete()
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class Meta:
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indexes = [
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models.Index(fields=["content_type", "object_id"]),
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]
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