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kratos/doc/wiki-cn/kratos-genbts.md

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### kratos tool genbts
> 缓存回源代码生成
在internal/dao/dao.go中添加mc缓存interface定义,可以指定对应的[注解参数](../../tool/kratos-gen-mc/README.md);
并且在接口前面添加`go:generate kratos tool genbts`;
然后在当前目录执行`go generate`,可以看到自动生成的dao.bts.go代码。
### 回源模板
```go
//go:generate kratos tool genbts
type _bts interface {
// bts: -batch=2 -max_group=20 -batch_err=break -nullcache=&Demo{ID:-1} -check_null_code=$.ID==-1
Demos(c context.Context, keys []int64) (map[int64]*Demo, error)
// bts: -sync=true -nullcache=&Demo{ID:-1} -check_null_code=$.ID==-1
Demo(c context.Context, key int64) (*Demo, error)
// bts: -paging=true
Demo1(c context.Context, key int64, pn int, ps int) (*Demo, error)
// bts: -nullcache=&Demo{ID:-1} -check_null_code=$.ID==-1
None(c context.Context) (*Demo, error)
}
```
### 参考
也可以参考完整的testdata例子:kratos/tool/kratos-gen-bts/testdata
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