json解析int64中的go;空值 [英] json parsing of int64 in go; null values
问题描述
我试图在Go中解析json流。我已经创建了一个简化的示例:
pre $ $ b $ import $ $ b $ encoding/ json
fmt
)
var d = [] byte(`{world:[{data:2251799813685312},{data:null}]} `)
类型jsonobj struct {World [] World}
类型世界struct {Data int64}
func main(){
var data jsonobj
jerr:= json.Unmarshal(d,& data)
fmt.Println(jerr)
}
这会给我
go run testmin.go
json:不能将null解组成空格到类型为int64的Go值
我在 sql包,但json似乎无法处理它。
是否有可以处理的可空int64类型?如果可能的话,我会很满意将json null 翻译为-1或MinValue。
感谢您的输入,
Fabian
只需使用 * int64
。指针可以是零,也可以指向具有关联值的int64,并且它们可以与Go的JSON包配合使用。
I'm trying to parse a json stream in Go. I've created a simplified example:
package main
import (
"encoding/json"
"fmt"
)
var d = []byte(`{ "world":[{"data": 2251799813685312}, {"data": null}]}`)
type jsonobj struct{ World []World }
type World struct{ Data int64 }
func main() {
var data jsonobj
jerr := json.Unmarshal(d, &data)
fmt.Println(jerr)
}
this will give me
go run testmin.go
json: cannot unmarshal null into Go value of type int64
I've found a nullable int64 in the sql package, but json doesn't seem to be able to handle it.
Is there a nullable int64 type that json can handle? If possible I'd be happy with the json null being translated to, -1 or MinValue.
Thank you for your input, Fabian
Just use a *int64
. A pointer can either be nil or it can point to an int64 with an associated value and they work fine with Go's JSON package.
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