增加发票和合同产品的关联，发票新增和修改时更改对应合同已开票金额

zhangqian

2023-08-09 7cc2f77503135e266264eb897e8f688e8ad216d5

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package constvar
 
import (
    "github.com/songzhibin97/gkit/cache/local_cache"
    "golang.org/x/sync/singleflight"
)
 
var (
    BlackCache  local_cache.Cache
    SingleGroup = &singleflight.Group{}
)