英文:
Gin binding middleware always fail
问题
我正在尝试为gin验证设置自定义错误消息，并遵循此线程中的建议：https://github.com/gin-gonic/gin/issues/430
我尝试以以下方式使用gin绑定中间件：
package main
import (
"fmt"
"net/http"
"github.com/gin-gonic/gin"
)
type itemPostRequest struct {
Name string `json:"name" binding:"required"`
}
func main() {
router := gin.Default()
router.Use(func (c *gin.Context) {
c.Next()
fmt.Println(c.Errors)
})
router.POST("/item", gin.Bind(itemPostRequest{}), func (c *gin.Context) {
fmt.Println("Im inside handler")
req := c.MustGet(gin.BindKey).(*itemPostRequest)
fmt.Println(req)
c.JSON(http.StatusOK, gin.H{"success": true})
})
router.Run()
}
我使用Postman发送请求，尽管我发送了正确的请求，但它总是显示：
Key: 'itemPostRequest.Name' Error:Field validation for 'Name' failed on the 'required' tag
如果我不使用绑定中间件：
router.POST("/item", func (c *gin.Context) {
...
它可以工作，但我希望能够在进入处理程序之前绑定并返回错误，就像线程中的建议一样。为什么这样不起作用？谢谢。
英文:
Im trying to have custom error messages for gin validation & followed the advice in this thread: https://github.com/gin-gonic/gin/issues/430
Im trying the gin binding midddleware this way:
package main
import (
"fmt"
"net/http"
"github.com/gin-gonic/gin"
)
type itemPostRequest struct {
Name string `json:"name" binding:"required"`
}
func main() {
router := gin.Default()
router.Use(func (c *gin.Context) {
c.Next()
fmt.Println(c.Errors)
})
router.POST("/item", gin.Bind(itemPostRequest{}), func (c *gin.Context) {
fmt.Println("Im inside handler")
req := c.MustGet(gin.BindKey).(*itemPostRequest)
fmt.Println(req)
c.JSON(http.StatusOK, gin.H{"success": true})
})
router.Run()
}
I send the request using Postman but although I have sent the correct request, it always say:
Key: 'itemPostRequest.Name' Error:Field validation for 'Name' failed on the 'required' tag
If I don't use the binding middleware:
router.POST("/item", func (c *gin.Context) {
...
It works but i want to be able to bind and return error before I go to the handler, just like the advice on the thread. Why is this not working? Thank you
答案1
得分: 0
感谢评论，我意识到我忘记了Content-Type为application/json。我之前使用c.ShouldBindWithJSON时没有意识到这一点，因为它不需要这个头部。
英文:
thx to the comment, I realized I missed Content-Type application/json. I didn't realize this because I used c.ShouldBindWithJSON before and it didnt need this header.
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