Gin: How to bin string data from Json to uint64

[thanhtungka91]

I hava a json from client post to server with string like

type MatSearch struct {
        ID         uint64 `json: "id"`
        Customerid uint64 `json: "customerid"`

}
var matsearch MatSearch
c.Bind(&matsearch)

I need to convert string to uint64 by manual or any function to suppport auto convert string to other type data when bind with gin

[delphinus]

You can use json.Number type for abstract “numberish” strings. It is json package's feature, not for gin.

package main

import (
    "encoding/json"
    "fmt"
    "net/http"

    "github.com/gin-gonic/gin"
)

func main() {
    r := gin.New()
    r.POST("/", func(c *gin.Context) {
        f := struct {
            Foo json.Number `json:"foo"`
        }{}
        if err := c.BindJSON(&f); err != nil {
            return
        }
        bar, err := f.Foo.Int64()
        if err != nil {
            c.AbortWithStatusJSON(
                http.StatusBadRequest,
                gin.H{"error": err.Error()},
            )
            return
        }
        c.JSON(http.StatusOK, gin.H{"result": bar})
    })
    r.Run("0:8080")
}

$ curl -X POST --data '{"foo":"12345"}' 0:8080
{"result":12345}
$ curl -X POST --data '{"foo":"foobar"}' 0:8080
{"error":"strconv.ParseInt: parsing \"foobar\": invalid syntax"}

[thinkerou]

@thanhtungka91 please see @delphinus comment and still have problem please reopen it, thanks!