light

light is a tool for generating database query code from go source file with interface methods commented with SQLs and Variables.

Interface methods commented with SQL and variables => go generate=> Database query code implementation

Usage

Install light tool. Make sure $GOBIN in your $PATH environment.

`go get -u -v github.com/omigo/light`

Run light -h, check install.

# light -h
Usage of light:
-log
Generated file with log

Define a interface, and comment methods with SQLs and Variables, then write a directive //go:generate light.

//go:generate light -log -timeout 30typeUserinterface {
// UPDATE users// SET [username=?,]// [phone=?,]// [address=?,]// [status=?,]// [birthday=?,]// updated=CURRENT_TIMESTAMP// WHERE id=?Update(u*model.User) (int64, error)
}

After that, run go generate ./..., code generated.

# go generate ./...
Source file /Users/Arstd/Reposits/src/github.com/omigo/light/example/store/user.go
Generated file /Users/Arstd/Reposits/src/github.com/omigo/light/example/store/user.light.go

typeUserStorestruct{}
func (*UserStore) Update(u*model.User) (int64, error) {
varbuf bytes.Buffervarargs []interface{}
buf.WriteString(`UPDATE users SET `)
ifu.Username!="" {
buf.WriteString(`username=?, `)
args=append(args, u.Username)
}
ifu.Phone!="" {
buf.WriteString(`phone=?, `)
args=append(args, null.String(&u.Phone))
}
ifu.Address!=nil {
buf.WriteString(`address=?, `)
args=append(args, u.Address)
}
ifu.Status!=0 {
buf.WriteString(`status=?, `)
args=append(args, null.Uint8(&u.Status))
}
ifu.Birthday!=nil {
buf.WriteString(`birthday=?, `)
args=append(args, u.Birthday)
}
buf.WriteString(`updated=CURRENT_TIMESTAMP WHERE id=? `)
args=append(args, null.Uint64(&u.Id))
query:=buf.String()
log.Debug(query)
log.Debug(args...)
res, err:=db.Exec(query, args...)
iferr!=nil {
log.Error(query)
log.Error(args...)
log.Error(err)
return0, err
}
returnres.RowsAffected()
}

More

Complete demo in example.

Source interface: example/store/user.go

Generated code: example/store/user.light.go