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132 lines
4.4 KiB
132 lines
4.4 KiB
# -*- coding: utf-8 -*-
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#
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from django.db.models.signals import (
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post_save, m2m_changed, pre_delete, post_delete, pre_save
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)
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from django.dispatch import receiver
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from common.const.signals import POST_ADD, POST_REMOVE, PRE_REMOVE
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from common.utils import get_logger
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from common.decorator import on_transaction_commit
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from assets.models import Asset, SystemUser, Node
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from assets.tasks import (
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update_assets_hardware_info_util,
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test_asset_connectivity_util,
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push_system_user_to_assets,
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)
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logger = get_logger(__file__)
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def update_asset_hardware_info_on_created(asset):
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logger.debug("Update asset `{}` hardware info".format(asset))
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update_assets_hardware_info_util.delay([asset])
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def test_asset_conn_on_created(asset):
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logger.debug("Test asset `{}` connectivity".format(asset))
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test_asset_connectivity_util.delay([asset])
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@receiver(pre_save, sender=Node)
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def on_node_pre_save(sender, instance: Node, **kwargs):
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instance.parent_key = instance.compute_parent_key()
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@receiver(post_save, sender=Asset)
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@on_transaction_commit
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def on_asset_created_or_update(sender, instance=None, created=False, **kwargs):
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"""
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当资产创建时，更新硬件信息，更新可连接性
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确保资产必须属于一个节点
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"""
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if created:
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logger.info("Asset create signal recv: {}".format(instance))
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# 获取资产硬件信息
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update_asset_hardware_info_on_created(instance)
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test_asset_conn_on_created(instance)
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# 确保资产存在一个节点
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has_node = instance.nodes.all().exists()
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if not has_node:
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instance.nodes.add(Node.org_root())
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instance.set_admin_user_relation()
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@receiver(m2m_changed, sender=Asset.nodes.through)
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def on_asset_nodes_add(instance, action, reverse, pk_set, **kwargs):
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"""
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本操作共访问 4 次数据库
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当资产的节点发生变化时，或者 当节点的资产关系发生变化时，
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节点下新增的资产，添加到节点关联的系统用户中
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"""
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if action != POST_ADD:
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return
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logger.debug("Assets node add signal recv: {}".format(action))
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if reverse:
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nodes = [instance.key]
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asset_ids = pk_set
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else:
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nodes = Node.objects.filter(pk__in=pk_set).values_list('key', flat=True)
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asset_ids = [instance.id]
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# 节点资产发生变化时，将资产关联到节点及祖先节点关联的系统用户, 只关注新增的
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nodes_ancestors_keys = set()
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for node in nodes:
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nodes_ancestors_keys.update(Node.get_node_ancestor_keys(node, with_self=True))
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# 查询所有祖先节点关联的系统用户，都是要跟资产建立关系的
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system_user_ids = SystemUser.objects.filter(
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nodes__key__in=nodes_ancestors_keys
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).distinct().values_list('id', flat=True)
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# 查询所有已存在的关系
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m2m_model = SystemUser.assets.through
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exist = set(m2m_model.objects.filter(
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systemuser_id__in=system_user_ids, asset_id__in=asset_ids
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).values_list('systemuser_id', 'asset_id'))
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# TODO 优化
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to_create = []
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for system_user_id in system_user_ids:
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asset_ids_to_push = []
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for asset_id in asset_ids:
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if (system_user_id, asset_id) in exist:
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continue
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asset_ids_to_push.append(asset_id)
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to_create.append(m2m_model(
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systemuser_id=system_user_id,
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asset_id=asset_id,
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org_id=instance.org_id
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))
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if asset_ids_to_push:
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push_system_user_to_assets.delay(system_user_id, asset_ids_to_push)
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m2m_model.objects.bulk_create(to_create)
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RELATED_NODE_IDS = '_related_node_ids'
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@receiver(pre_delete, sender=Asset)
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def on_asset_delete(instance: Asset, using, **kwargs):
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node_ids = set(Node.objects.filter(
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assets=instance
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).distinct().values_list('id', flat=True))
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setattr(instance, RELATED_NODE_IDS, node_ids)
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m2m_changed.send(
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sender=Asset.nodes.through, instance=instance, reverse=False,
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model=Node, pk_set=node_ids, using=using, action=PRE_REMOVE
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)
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@receiver(post_delete, sender=Asset)
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def on_asset_post_delete(instance: Asset, using, **kwargs):
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node_ids = getattr(instance, RELATED_NODE_IDS, None)
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if node_ids:
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m2m_changed.send(
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sender=Asset.nodes.through, instance=instance, reverse=False,
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model=Node, pk_set=node_ids, using=using, action=POST_REMOVE
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)
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