英文:
Golang echo.JSON turns Zero time.Time as Empty String but I Expect to be Returned as "0001-01-01 00:00:00"
问题
你好，我想问一些关于Golang echo.JSON()方法的问题。这行代码将返回一个virtualAccount结构体。
func (h virtualAccountsServiceHandler) Get(c echo.Context) (err error) {virtualAccountID := c.Param("id")virtualAccount, err := h.service.GetByID(c.Request().Context(), virtualAccountID)if err != nil {return}return c.JSON(http.StatusOK, virtualAccount)}
这是结构体的定义：
type VirtualAccount struct {ID string `json:"id"`ExpirationDate time.Time `json:"expirationDate"`CreatedAt time.Time `json:"createdAt"`UpdatedAt time.Time `json:"updatedAt"`DeletedAt time.Time `json:"-"`}
如果ExpirationDate是一个正常的日期，这个函数会正常返回。但是当数据包含零值的time.Time（如此处所述https://pkg.go.dev/time）时，问题就出现了。
h.service.GetByID方法会返回原始日期（0001-01-01 00:00:00.000），但echo.JSON会返回空字符串""，因为时间数据现在的值是time.Time{}。
如何使echo.JSON返回原始日期（0001-01-01 00:00:00.000）呢？
英文:
Hi I want to ask some question regarding Golang echo.JSON() method. This line of code will return a virtualAccount struct
func (h virtualAccountsServiceHandler) Get(c echo.Context) (err error) {virtualAccountID := c.Param("id")virtualAccount, err := h.service.GetByID(c.Request().Context(), virtualAccountID)if err != nil {return}return c.JSON(http.StatusOK, virtualAccount)}
And this is the struct
type VirtualAccount struct {ID string `json:"id"`ExpirationDate time.Time `json:"expirationDate"`CreatedAt time.Time `json:"createdAt"`UpdatedAt time.Time `json:"updatedAt"`DeletedAt time.Time `json:"-"`}
This function returns normally if the ExpirationDate is a normal date. But the problem arise when the data contains zero time.Time (0001-01-01 00:00:00.000 as stated here https://pkg.go.dev/time).
h.service.GetByID method will returns the date as it is (0001-01-01 00:00:00.000) but the echo.JSON will return empty string "" because now the time data has value of time.Time{}.
How to make echo.JSON returns it as it is (0001-01-01 00:00:00.000)?
答案1
得分: 1
我测试了这段代码：
package mainimport ("net/http""time""github.com/labstack/echo/v4""github.com/labstack/echo/v4/middleware")type Account struct {ExpirationDate time.Time `json:"expirationDate"`}func hello(c echo.Context) error {acc := Account{}return c.JSON(http.StatusOK, acc)}func main() {e := echo.New()e.Use(middleware.Logger())e.Use(middleware.Recover())e.GET("/", hello)e.Logger.Fatal(e.Start(":1323"))}
它的执行结果如下：
$ go run main.go____ __/ __/___/ / ___/ _// __/ _ \/ _ \/___/\__/_//_/\___/ v4.7.2High performance, minimalist Go web frameworkhttps://echo.labstack.com____________________________________O/_______O\⇨ http server started on [::]:1323{"time":"2022-04-30T17:06:24.090332232-03:00","id":"","remote_ip":"127.0.0.1","host":"localhost:1323","method":"GET","uri":"/","user_agent":"curl/7.29.0","status":200,"error":"","latency":146878,"latency_human":"146.878µs","bytes_in":0,"bytes_out":42}
然而，它返回了你期望的结果：
$ curl localhost:1323{"expirationDate":"0001-01-01T00:00:00Z"}
英文:
I tested this code:
package mainimport ("net/http""time""github.com/labstack/echo/v4""github.com/labstack/echo/v4/middleware")type Account struct {ExpirationDate time.Time `json:"expirationDate"`}func hello(c echo.Context) error {acc := Account{}return c.JSON(http.StatusOK, acc)}func main() {e := echo.New()e.Use(middleware.Logger())e.Use(middleware.Recover())e.GET("/", hello)e.Logger.Fatal(e.Start(":1323"))}
Its execution went like this:
$ go run main.go____ __/ __/___/ / ___/ _// __/ _ \/ _ \/___/\__/_//_/\___/ v4.7.2High performance, minimalist Go web frameworkhttps://echo.labstack.com____________________________________O/_______O\⇨ http server started on [::]:1323{"time":"2022-04-30T17:06:24.090332232-03:00","id":"","remote_ip":"127.0.0.1","host":"localhost:1323","method":"GET","uri":"/","user_agent":"curl/7.29.0","status":200,"error":"","latency":146878,"latency_human":"146.878µs","bytes_in":0,"bytes_out":42}
However it returned what you expected:
$ curl localhost:1323{"expirationDate":"0001-01-01T00:00:00Z"}
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