英文:
Implement Scan and Value functions in golang
问题
我正在尝试将一些 Golang 对象存储在 SQL 数据库中，并已经实现了以下的扫描器（scanner）和值接口（value interface）：
func (attr *myStruct) Scan(src interface{}) error {
switch v := src.(type) {
case string:
return json.Unmarshal([]byte(v), attr)
case []byte:
return json.Unmarshal(v, attr)
}
return fmt.Errorf("无法将 %T 转换为 My struct", src)
}
//nolint:hugeParam
func (attr mystruct) Value() (driver.Value, error) {
return json.Marshal(attr)
}
有没有办法通过指针将参数传递给 Value() 函数？因为当尝试将数据转换回我的结构体时，我得到了一个 HugeParam 错误，表示传递给 Value() 函数的 attr 太大了。
任何建议都将不胜感激，谢谢！
更新：我尝试通过在代码中添加 nolint 来忽略 hugeParam，但错误仍然存在。以下是错误消息：
golangci-lint run --deadline 300s
feedback-handler-test_1_fdc66eade9d0 | level=warning msg="[runner] The linter 'interfacer' is deprecated (since v1.38.0) due to: The repository of the linter has been archived by the owner. "
feedback-handler-test_1_fdc66eade9d0 | level=warning msg="[runner/nolint] Found unknown linters in //nolint directives: gocritic:hugeparam"
feedback-handler-test_1_fdc66eade9d0 | internal/app/domain/entity/feedbacks.go:61:7: hugeParam: attr is heavy (320 bytes); consider passing it by pointer (gocritic)
英文:
I am trying to store some golang objects in SQL database and have implemented the scanner and value interface as follows:
func (attr *myStruct) Scan(src interface{}) error {
switch v := src.(type) {
case string:
return json.Unmarshal([]byte(v), attr)
case []byte:
return json.Unmarshal(v, attr)
}
return fmt.Errorf("cannot convert %T to My struct", src)
}
//nolint:hugeParam
func (attr mystruct) Value() (driver.Value, error) {
return json.Marshal(attr)
}
Is there a way that I can pass the parameter to the Value() function by pointers, as I am getting a HugeParam error that the attr passed to the Value() function is too big, when trying to convert the data back to my struct.
Any advise is appreciated, thanks!
Update: I am trying to solve this issue by marking a nolint to ignore the huge param but the error still persists. This is the error msg:
golangci-lint run --deadline 300s
feedback-handler-test_1_fdc66eade9d0 | level=warning msg="[runner] The linter 'interfacer' is deprecated (since v1.38.0) due to: The repository of the linter has been archived by the owner. "
feedback-handler-test_1_fdc66eade9d0 | level=warning msg="[runner/nolint] Found unknown linters in //nolint directives: gocritic:hugeparam"
feedback-handler-test_1_fdc66eade9d0 | internal/app/domain/entity/feedbacks.go:61:7: hugeParam: attr is heavy (320 bytes); consider passing it by pointer (gocritic)
答案1
得分: 0
修复：
/nolint // hugeParam: //插入解释
func (attr mystruct) Value() (driver.Value, error) {
return json.Marshal(attr)
}
英文:
Fix:
/nolint // hugeParam: //insert explanation
func (attr mystruct) Value() (driver.Value, error) {
return json.Marshal(attr)
}
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