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# -*- coding: utf-8 -*-
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#
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import re
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import threading
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import time
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import uuid
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from collections import defaultdict
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from django.core.cache import cache
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from django.db import models, transaction
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from django.db.models import F, Q, Manager
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from django.db.transaction import atomic
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from django.utils.translation import gettext_lazy as _, gettext
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from common.utils import get_logger, timeit
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from common.utils.lock import DistributedLock
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from orgs.mixins.models import OrgManager, JMSOrgBaseModel
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from orgs.models import Organization
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from orgs.utils import get_current_org, tmp_to_org, tmp_to_root_org
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__all__ = ['Node', 'FamilyMixin', 'compute_parent_key', 'NodeQuerySet']
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logger = get_logger(__name__)
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def compute_parent_key(key):
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try:
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return key[:key.rindex(':')]
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except ValueError:
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return ''
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class NodeQuerySet(models.QuerySet):
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pass
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class FamilyMixin:
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__parents = None
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__children = None
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__all_children = None
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is_node = True
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child_mark: int
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@staticmethod
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def clean_children_keys(nodes_keys):
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sort_key = lambda k: [int(i) for i in k.split(':')]
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nodes_keys = sorted(list(nodes_keys), key=sort_key)
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nodes_keys_clean = []
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base_key = ''
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for key in nodes_keys:
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if key.startswith(base_key + ':'):
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continue
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nodes_keys_clean.append(key)
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base_key = key
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return nodes_keys_clean
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@classmethod
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def get_node_all_children_key_pattern(cls, key, with_self=True):
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pattern = r'^{0}:'.format(key)
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if with_self:
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pattern += r'|^{0}$'.format(key)
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return pattern
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@classmethod
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def get_nodes_children_key_pattern(cls, nodes, with_self=True):
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keys = [i.key for i in nodes]
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keys = cls.clean_children_keys(keys)
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patterns = [cls.get_node_all_children_key_pattern(key) for key in keys]
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patterns = '|'.join(patterns)
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return patterns
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@classmethod
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def get_nodes_all_children(cls, nodes, with_self=True):
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pattern = cls.get_nodes_children_key_pattern(nodes, with_self=with_self)
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if not pattern:
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# 如果 pattern = ''
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# key__iregex 报错 (1139, "Got error 'empty (sub)expression' from regexp")
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return cls.objects.none()
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return Node.objects.filter(key__iregex=pattern)
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@classmethod
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def get_node_children_key_pattern(cls, key, with_self=True):
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pattern = r'^{0}:[0-9]+$'.format(key)
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if with_self:
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pattern += r'|^{0}$'.format(key)
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return pattern
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def get_children_key_pattern(self, with_self=False):
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return self.get_node_children_key_pattern(self.key, with_self=with_self)
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def get_all_children_pattern(self, with_self=False):
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return self.get_node_all_children_key_pattern(self.key, with_self=with_self)
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def is_children(self, other):
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children_pattern = other.get_children_key_pattern(with_self=False)
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return re.match(children_pattern, self.key)
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def get_children(self, with_self=False):
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q = Q(parent_key=self.key)
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if with_self:
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q |= Q(key=self.key)
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return Node.objects.filter(q)
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def get_all_children(self, with_self=False):
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q = Q(key__istartswith=f'{self.key}:')
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if with_self:
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q |= Q(key=self.key)
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return Node.objects.filter(q)
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@classmethod
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def get_ancestor_queryset(cls, queryset, with_self=True):
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parent_keys = set()
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for i in queryset:
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parent_keys.update(set(i.get_ancestor_keys(with_self=with_self)))
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queryset = queryset.model.objects.filter(key__in=list(parent_keys)).distinct()
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return queryset
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@property
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def children(self):
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return self.get_children(with_self=False)
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@property
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def all_children(self):
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return self.get_all_children(with_self=False)
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def create_child(self, value=None, _id=None):
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with atomic(savepoint=False):
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child_key = self.get_next_child_key()
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if value is None:
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value = child_key
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child = self.__class__.objects.create(
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id=_id, key=child_key, value=value
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)
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return child
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def get_or_create_child(self, value, _id=None):
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"""
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:return: Node, bool (created)
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"""
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children = self.get_children()
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exist = children.filter(value=value).exists()
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if exist:
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child = children.filter(value=value).first()
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created = False
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else:
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child = self.create_child(value, _id)
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created = True
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return child, created
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def get_valid_child_mark(self):
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key = "{}:{}".format(self.key, self.child_mark)
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if not self.__class__.objects.filter(key=key).exists():
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return self.child_mark
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children_keys = self.get_children().values_list('key', flat=True)
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children_keys_last = [key.split(':')[-1] for key in children_keys]
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children_keys_last = [int(k) for k in children_keys_last if k.strip().isdigit()]
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max_key_last = max(children_keys_last) if children_keys_last else 1
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return max_key_last + 1
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def get_next_child_key(self):
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child_mark = self.get_valid_child_mark()
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key = "{}:{}".format(self.key, child_mark)
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self.child_mark = child_mark + 1
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self.save()
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return key
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def get_next_child_preset_name(self):
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name = gettext("New node")
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values = [
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child.value[child.value.rfind(' '):]
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for child in self.get_children()
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if child.value.startswith(name)
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]
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values = [int(value) for value in values if value.strip().isdigit()]
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count = max(values) + 1 if values else 1
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return '{} {}'.format(name, count)
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# Parents
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@classmethod
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def get_node_ancestor_keys(cls, key, with_self=False):
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parent_keys = []
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key_list = key.split(":")
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if not with_self:
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key_list.pop()
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for i in range(len(key_list)):
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parent_keys.append(":".join(key_list))
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key_list.pop()
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return parent_keys
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def get_ancestor_keys(self, with_self=False):
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return self.get_node_ancestor_keys(self.key, with_self=with_self)
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@property
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def ancestors(self):
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return self.get_ancestors(with_self=False)
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def get_ancestors(self, with_self=False):
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ancestor_keys = self.get_ancestor_keys(with_self=with_self)
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return self.__class__.objects.filter(key__in=ancestor_keys)
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def compute_parent_key(self):
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return compute_parent_key(self.key)
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def is_parent(self, other):
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return other.is_children(self)
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@property
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def parent(self):
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if self.is_org_root():
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return self
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parent_key = self.parent_key
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return Node.objects.get(key=parent_key)
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@parent.setter
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def parent(self, parent):
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if not self.is_node:
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self.key = parent.key + ':fake'
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return
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children = self.get_all_children()
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old_key = self.key
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with transaction.atomic():
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self.key = parent.get_next_child_key()
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self.save()
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for child in children:
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child.key = child.key.replace(old_key, self.key, 1)
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child.save()
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def get_siblings(self, with_self=False):
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key = ':'.join(self.key.split(':')[:-1])
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pattern = r'^{}:[0-9]+$'.format(key)
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sibling = Node.objects.filter(
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key__regex=pattern.format(self.key)
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)
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if not with_self:
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sibling = sibling.exclude(key=self.key)
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return sibling
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@classmethod
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def create_node_by_full_value(cls, full_value):
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if not full_value:
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return []
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nodes_family = full_value.split('/')
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nodes_family = [v for v in nodes_family if v]
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org_root = cls.org_root()
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if nodes_family[0] == org_root.value:
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nodes_family = nodes_family[1:]
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return cls.create_nodes_recurse(nodes_family, org_root)
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@classmethod
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def create_nodes_recurse(cls, values, parent=None):
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values = [v for v in values if v]
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if not values:
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return None
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if parent is None:
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parent = cls.org_root()
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value = values[0]
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child, created = parent.get_or_create_child(value=value)
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if len(values) == 1:
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return child
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return cls.create_nodes_recurse(values[1:], child)
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def get_family(self):
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ancestors = self.get_ancestors()
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children = self.get_all_children()
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return [*tuple(ancestors), self, *tuple(children)]
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class NodeAllAssetsMappingMixin:
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# { org_id: { node_key: [ asset1_id, asset2_id ] } }
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orgid_nodekey_assetsid_mapping = defaultdict(dict)
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locks_for_get_mapping_from_cache = defaultdict(threading.Lock)
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@classmethod
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def get_lock(cls, org_id):
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lock = cls.locks_for_get_mapping_from_cache[str(org_id)]
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return lock
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@classmethod
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def get_node_all_asset_ids_mapping(cls, org_id):
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_mapping = cls.get_node_all_asset_ids_mapping_from_memory(org_id)
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if _mapping:
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return _mapping
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with cls.get_lock(org_id):
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_mapping = cls.get_node_all_asset_ids_mapping_from_cache_or_generate_to_cache(org_id)
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cls.set_node_all_asset_ids_mapping_to_memory(org_id, mapping=_mapping)
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return _mapping
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# from memory
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@classmethod
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def get_node_all_asset_ids_mapping_from_memory(cls, org_id):
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mapping = cls.orgid_nodekey_assetsid_mapping.get(org_id, {})
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return mapping
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@classmethod
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def set_node_all_asset_ids_mapping_to_memory(cls, org_id, mapping):
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cls.orgid_nodekey_assetsid_mapping[org_id] = mapping
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@classmethod
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def expire_node_all_asset_ids_memory_mapping(cls, org_id):
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org_id = str(org_id)
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cls.orgid_nodekey_assetsid_mapping.pop(org_id, None)
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@classmethod
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def expire_all_orgs_node_all_asset_ids_memory_mapping(cls):
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orgs = Organization.objects.all()
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org_ids = [str(org.id) for org in orgs]
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org_ids.append(Organization.ROOT_ID)
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for i in org_ids:
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cls.expire_node_all_asset_ids_memory_mapping(i)
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# get order: from memory -> (from cache -> to generate)
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@classmethod
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def get_node_all_asset_ids_mapping_from_cache_or_generate_to_cache(cls, org_id):
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mapping = cls.get_node_all_asset_ids_mapping_from_cache(org_id)
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if mapping:
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return mapping
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lock_key = f'KEY_LOCK_GENERATE_ORG_{org_id}_NODE_ALL_ASSET_ids_MAPPING'
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with DistributedLock(lock_key):
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# 这里使用无限期锁，原因是如果这里卡住了，就卡在数据库了，说明
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# 数据库繁忙，所以不应该再有线程执行这个操作，使数据库忙上加忙
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_mapping = cls.get_node_all_asset_ids_mapping_from_cache(org_id)
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if _mapping:
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return _mapping
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_mapping = cls.generate_node_all_asset_ids_mapping(org_id)
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cache_key = cls._get_cache_key_for_node_all_asset_ids_mapping(org_id)
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cache.set(cache_key, mapping, timeout=None)
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return _mapping
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@classmethod
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def get_node_all_asset_ids_mapping_from_cache(cls, org_id):
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cache_key = cls._get_cache_key_for_node_all_asset_ids_mapping(org_id)
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mapping = cache.get(cache_key)
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return mapping
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@classmethod
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def expire_node_all_asset_ids_cache_mapping(cls, org_id):
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cache_key = cls._get_cache_key_for_node_all_asset_ids_mapping(org_id)
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cache.delete(cache_key)
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@staticmethod
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def _get_cache_key_for_node_all_asset_ids_mapping(org_id):
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return 'ASSETS_ORG_NODE_ALL_ASSET_ids_MAPPING_{}'.format(org_id)
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@classmethod
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@timeit
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def generate_node_all_asset_ids_mapping(cls, org_id):
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logger.info(f'Generate node asset mapping: org_id={org_id}')
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t1 = time.time()
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with tmp_to_org(org_id):
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node_ids_key = Node.objects.annotate(
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char_id=F('id')
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).values_list('char_id', 'key')
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node_ids_key = [(str(node_id), node_key) for node_id, node_key in node_ids_key]
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node_id_ancestor_keys_mapping = {
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node_id: cls.get_node_ancestor_keys(node_key, with_self=True)
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for node_id, node_key in node_ids_key
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}
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# * 直接取出全部. filter(node__org_id=org_id)(大规模下会更慢)
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nodes_asset_ids = cls.assets.through.objects.all() \
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.annotate(char_node_id=F('node_id')) \
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.annotate(char_asset_id=F('asset_id')) \
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.values_list('char_node_id', 'char_asset_id')
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nodeid_assetsid_mapping = defaultdict(set)
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for node_id, asset_id in nodes_asset_ids:
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node_id, asset_id = str(node_id), str(asset_id)
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nodeid_assetsid_mapping[node_id].add(asset_id)
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t2 = time.time()
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mapping = defaultdict(set)
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for node_id, node_key in node_ids_key:
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asset_ids = nodeid_assetsid_mapping[node_id]
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node_ancestor_keys = node_id_ancestor_keys_mapping[node_id]
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for ancestor_key in node_ancestor_keys:
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mapping[ancestor_key].update(asset_ids)
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t3 = time.time()
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logger.info('Generate asset nodes mapping, DB query: {:.2f}s, mapping: {:.2f}s'.format(t2 - t1, t3 - t2))
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return mapping
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class NodeAssetsMixin(NodeAllAssetsMappingMixin):
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org_id: str
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key = ''
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id = None
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objects: Manager
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def get_all_assets(self):
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from .asset import Asset
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q = Q(nodes__key__startswith=f'{self.key}:') | Q(nodes__key=self.key)
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return Asset.objects.filter(q).distinct()
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def get_assets_amount(self):
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return self.get_all_assets().count()
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@classmethod
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def get_node_all_assets_by_key_v2(cls, key):
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# 最初的写法是：
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# Asset.objects.filter(Q(nodes__key__startswith=f'{node.key}:') | Q(nodes__id=node.id))
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# 可是 startswith 会导致表关联时 Asset 索引失效
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from .asset import Asset
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node_ids = cls.objects.filter(
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Q(key__startswith=f'{key}:') | Q(key=key)
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).values_list('id', flat=True).distinct()
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assets = Asset.objects.filter(
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nodes__id__in=list(node_ids)
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).distinct()
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return assets
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def get_assets(self):
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from .asset import Asset
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assets = Asset.objects.filter(nodes=self)
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return assets.distinct()
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def get_valid_assets(self):
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return self.get_assets().valid()
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def get_all_valid_assets(self):
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return self.get_all_assets().valid()
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@classmethod
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def get_nodes_all_asset_ids_by_keys(cls, nodes_keys):
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nodes = Node.objects.filter(key__in=nodes_keys)
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asset_ids = cls.get_nodes_all_assets(*nodes).values_list('id', flat=True)
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return asset_ids
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@classmethod
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@timeit
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def get_nodes_all_assets(cls, *nodes, distinct=True):
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from .asset import Asset
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node_ids = set()
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descendant_node_query = Q()
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for n in nodes:
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node_ids.add(n.id)
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descendant_node_query |= Q(key__istartswith=f'{n.key}:')
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if descendant_node_query:
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_ids = Node.objects.order_by().filter(descendant_node_query).values_list('id', flat=True)
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node_ids.update(_ids)
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assets = Asset.objects.order_by().filter(nodes__id__in=node_ids)
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if distinct:
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assets = assets.distinct()
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return assets
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def get_all_asset_ids(self):
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asset_ids = self.get_all_asset_ids_by_node_key(org_id=self.org_id, node_key=self.key)
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return set(asset_ids)
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@classmethod
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def get_all_asset_ids_by_node_key(cls, org_id, node_key):
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org_id = str(org_id)
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nodekey_assetsid_mapping = cls.get_node_all_asset_ids_mapping(org_id)
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asset_ids = nodekey_assetsid_mapping.get(node_key, [])
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return set(asset_ids)
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class SomeNodesMixin:
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key = ''
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default_key = '1'
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empty_key = '-11'
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empty_value = _("empty")
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def is_default_node(self):
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return self.key == self.default_key
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def is_org_root(self):
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if self.key.isdigit():
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return True
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else:
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return False
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@classmethod
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def org_root(cls):
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# 如果使用current_org 在set_current_org时会死循环
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ori_org = get_current_org()
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if ori_org and ori_org.is_default():
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return cls.default_node()
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if ori_org and ori_org.is_root():
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return cls.default_node()
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org_roots = cls.org_root_nodes()
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org_roots_length = len(org_roots)
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if org_roots_length == 1:
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root = org_roots[0]
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return root
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elif org_roots_length == 0:
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root = cls.create_org_root_node()
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return root
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else:
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error = 'Current org {} root node not 1, get {}'.format(ori_org, org_roots_length)
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raise ValueError(error)
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@classmethod
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def default_node(cls):
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default_org = Organization.default()
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with tmp_to_org(default_org):
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defaults = {'value': default_org.name}
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obj, created = cls.objects.get_or_create(defaults=defaults, key=cls.default_key)
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return obj
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@classmethod
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def create_org_root_node(cls):
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ori_org = get_current_org()
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with transaction.atomic():
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key = cls.get_next_org_root_node_key()
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root = cls.objects.create(key=key, value=ori_org.name)
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return root
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@classmethod
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def get_next_org_root_node_key(cls):
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with tmp_to_root_org():
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org_nodes_roots = cls.org_root_nodes()
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org_nodes_roots_keys = org_nodes_roots.values_list('key', flat=True)
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if not org_nodes_roots_keys:
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org_nodes_roots_keys = ['1']
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max_key = max([int(k) for k in org_nodes_roots_keys])
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key = str(max_key + 1) if max_key > 0 else '2'
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return key
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@classmethod
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def org_root_nodes(cls):
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root_nodes = cls.objects.filter(parent_key='', key__regex=r'^[0-9]+$') \
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.exclude(key__startswith='-').order_by('key')
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return root_nodes
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class Node(JMSOrgBaseModel, SomeNodesMixin, FamilyMixin, NodeAssetsMixin):
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id = models.UUIDField(default=uuid.uuid4, primary_key=True)
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key = models.CharField(unique=True, max_length=64, verbose_name=_("Key")) # '1:1:1:1'
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value = models.CharField(max_length=128, verbose_name=_("Value"))
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full_value = models.CharField(max_length=4096, verbose_name=_('Full value'), default='')
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child_mark = models.IntegerField(default=0)
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date_create = models.DateTimeField(auto_now_add=True)
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parent_key = models.CharField(
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max_length=64, verbose_name=_("Parent key"), db_index=True, default=''
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)
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assets_amount = models.IntegerField(default=0)
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objects = OrgManager.from_queryset(NodeQuerySet)()
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is_node = True
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_parents = None
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class Meta:
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verbose_name = _("Node")
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ordering = ['parent_key', 'value']
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permissions = [
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('match_node', _('Can match node')),
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]
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def __str__(self):
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return self.full_value
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def __gt__(self, other):
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self_key = [int(k) for k in self.key.split(':')]
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other_key = [int(k) for k in other.key.split(':')]
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self_parent_key = self_key[:-1]
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other_parent_key = other_key[:-1]
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if self_parent_key and self_parent_key == other_parent_key:
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return self.value > other.value
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return self_key > other_key
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def __lt__(self, other):
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|
return not self.__gt__(other)
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|
@property
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def name(self):
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return self.value
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def computed_full_value(self):
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|
# 不要在列表中调用该属性
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|
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values = self.__class__.objects.filter(
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key__in=self.get_ancestor_keys()
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).values_list('key', 'value')
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values = [v for k, v in sorted(values, key=lambda x: len(x[0]))]
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|
|
values.append(str(self.value))
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|
|
return '/' + '/'.join(values)
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|
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|
|
@property
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|
|
def level(self):
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|
|
return len(self.key.split(':'))
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|
|
|
def as_tree_node(self):
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|
|
from common.tree import TreeNode
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|
name = '{} ({})'.format(self.value, self.assets_amount)
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|
|
data = {
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'id': self.key,
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'name': name,
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'title': name,
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'pId': self.parent_key,
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'isParent': True,
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'open': self.is_org_root(),
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'meta': {
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'data': {
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"id": self.id,
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"name": self.name,
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"value": self.value,
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"key": self.key,
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"assets_amount": self.assets_amount,
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|
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},
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|
|
'type': 'node'
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|
|
}
|
|
|
}
|
|
|
tree_node = TreeNode(**data)
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|
|
return tree_node
|
|
|
|
|
|
def has_offspring_assets(self):
|
|
|
# 拥有后代资产
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|
|
return self.get_all_assets().exists()
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|
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|
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def delete(self, using=None, keep_parents=False):
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|
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if self.has_offspring_assets():
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|
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return
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|
|
self.all_children.delete()
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|
|
return super().delete(using=using, keep_parents=keep_parents)
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|
|
|
|
|
def update_child_full_value(self):
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|
|
nodes = self.get_all_children(with_self=True)
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|
|
sort_key_func = lambda n: [int(i) for i in n.key.split(':')]
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|
|
nodes_sorted = sorted(list(nodes), key=sort_key_func)
|
|
|
nodes_mapper = {n.key: n for n in nodes_sorted}
|
|
|
if not self.is_org_root():
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|
|
# 如果是org_root，那么parent_key为'', parent为自己，所以这种情况不处理
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|
|
# 更新自己时，自己的parent_key获取不到
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|
|
nodes_mapper.update({self.parent_key: self.parent})
|
|
|
for node in nodes_sorted:
|
|
|
parent = nodes_mapper.get(node.parent_key)
|
|
|
if not parent:
|
|
|
if node.parent_key:
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|
|
logger.error(f'Node parent node in mapper: {node.parent_key} {node.value}')
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|
|
continue
|
|
|
node.full_value = parent.full_value + '/' + node.value
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|
|
self.__class__.objects.bulk_update(nodes, ['full_value'])
|
|
|
|
|
|
def save(self, *args, **kwargs):
|
|
|
self.full_value = self.computed_full_value()
|
|
|
instance = super().save(*args, **kwargs)
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|
|
self.update_child_full_value()
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|
|
return instance
|
