json parsing of int64 in go; null values
go, int64, json
Solution
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.
Problem
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