Q is a constant within the django.db.models.query module of the Django project.
django-wiki (project documentation, demo, and PyPI page) is a wiki system code library for Django projects that makes it easier to create user-editable content. The project aims to provide necessary core features and then have an easy plugin format for additional features, rather than having every exhaustive feature built into the core system. django-wiki is a rewrite of an earlier now-defunct project named django-simplewiki.
The code for django-wiki is provided as open source under the GNU General Public License 3.0.
django-wiki / src/wiki / managers.py
# managers.py
from django.db import models
from django.db.models import Count
from django.db.models import Q
from django.db.models.query import EmptyQuerySet
from django.db.models.query import QuerySet
from mptt.managers import TreeManager
class ArticleQuerySet(QuerySet):
def can_read(self, user):
if user.has_perm("wiki.moderator"):
return self
if user.is_anonymous:
q = self.filter(other_read=True)
else:
q = self.filter(
Q(other_read=True)
| Q(owner=user)
| (Q(group__user=user) & Q(group_read=True))
).annotate(Count("id"))
return q
def can_write(self, user):
if user.has_perm("wiki.moderator"):
return self
if user.is_anonymous:
q = self.filter(other_write=True)
else:
q = self.filter(
Q(other_write=True)
| Q(owner=user)
| (Q(group__user=user) & Q(group_write=True))
)
return q
def active(self):
return self.filter(current_revision__deleted=False)
class ArticleEmptyQuerySet(EmptyQuerySet):
def can_read(self, user):
return self
def can_write(self, user):
return self
def active(self):
return self
class ArticleFkQuerySetMixin:
def can_read(self, user):
if user.has_perm("wiki.moderate"):
return self
if user.is_anonymous:
q = self.filter(article__other_read=True)
else:
q = self.filter(
Q(article__other_read=True)
| Q(article__owner=user)
| (Q(article__group__user=user) & Q(article__group_read=True))
).annotate(Count("id"))
return q
def can_write(self, user):
if user.has_perm("wiki.moderate"):
return self
if user.is_anonymous:
q = self.filter(article__other_write=True)
else:
q = self.filter(
Q(article__other_write=True)
| Q(article__owner=user)
| (Q(article__group__user=user) & Q(article__group_write=True))
).annotate(Count("id"))
return q
def active(self):
return self.filter(article__current_revision__deleted=False)
class ArticleFkEmptyQuerySetMixin:
def can_read(self, user):
return self
def can_write(self, user):
return self
def active(self):
return self
class ArticleFkQuerySet(ArticleFkQuerySetMixin, QuerySet):
pass
class ArticleFkEmptyQuerySet(ArticleFkEmptyQuerySetMixin, EmptyQuerySet):
pass
## ... source file continues with no further Q examples...