jumpserver/apps/labels/mixins.py

73 lines
2.2 KiB
Python

from django.contrib.contenttypes.fields import GenericRelation
from django.db import models
from django.db.models import OneToOneField, Count
from common.utils import lazyproperty
from .models import LabeledResource
__all__ = ['LabeledMixin']
class LabeledMixin(models.Model):
labels = GenericRelation(LabeledResource, object_id_field='res_id', content_type_field='res_type')
class Meta:
abstract = True
@classmethod
def label_model(cls):
pk_field = cls._meta.pk
model = cls
if isinstance(pk_field, OneToOneField):
model = pk_field.related_model
return model
@lazyproperty
def real(self):
pk_field = self._meta.pk
if isinstance(pk_field, OneToOneField):
return getattr(self, pk_field.name)
return self
@property
def res_labels(self):
return self.real.labels
@res_labels.setter
def res_labels(self, value):
self.real.labels.set(value, bulk=False)
@classmethod
def filter_resources_by_labels(cls, resources, label_ids):
return cls._get_filter_res_by_labels_m2m_all(resources, label_ids)
@classmethod
def _get_filter_res_by_labels_m2m_in(cls, resources, label_ids):
return resources.filter(label_id__in=label_ids)
@classmethod
def _get_filter_res_by_labels_m2m_all(cls, resources, label_ids):
if len(label_ids) == 1:
return cls._get_filter_res_by_labels_m2m_in(resources, label_ids)
resources = resources.filter(label_id__in=label_ids) \
.values('res_id') \
.order_by('res_id') \
.annotate(count=Count('res_id', distinct=True)) \
.values('res_id', 'count') \
.filter(count=len(label_ids))
return resources
@classmethod
def get_labels_filter_attr_q(cls, value, match):
resources = LabeledResource.objects.all()
if not value:
return None
if match != 'm2m_all':
resources = cls._get_filter_res_by_labels_m2m_in(resources, value)
else:
resources = cls._get_filter_res_by_labels_m2m_all(resources, value)
res_ids = set(resources.values_list('res_id', flat=True))
return models.Q(id__in=res_ids)