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from django . db . models . signals import post_save
from django . dispatch import receiver
from basic_info . models import WarehouseModel
from goods_info . models import GoodsModel , GoodsInventoryModel
import logging
logger = logging . getLogger ( ' my ' )
@receiver ( post_save , sender = WarehouseModel )
def create_goods_inventory ( sender , instance , created , * * kwargs ) :
"""
创建信号监控函数
创建新仓库之后， 给所有的货品在当前的新仓库 新增库存数据
"""
if created :
logger . info ( ' 创建当前的新仓库——新增库存数据 ' )
if isinstance ( instance , WarehouseModel ) :
# 首先查询所有的货品id
ids = GoodsModel . objects . values_list ( ' id ' , flat = True ) . all ( )
inventory_list = [ ]
for gid in ids :
inventory_list . append ( GoodsInventoryModel (
goods_id = gid ,
warehouse_name = instance . name ,
warehouse = instance
) )
# 一定要采用批量新增函数：
GoodsInventoryModel . objects . bulk_create ( inventory_list )
else :
logger . info ( ' 不是WarehouseModel类型， ' )
