Write Struct to Json File using Struct Fields (not json keys)

go, json

Solution

If I understand your question correctly, all you want to do is remove the json tags from your struct definition.

So:

package main

import (
    "encoding/json"
    "fmt"
    "io/ioutil"
)

type Rankings struct {
    Keyword  string 
    GetCount uint32 
    Engine   string 
    Locale   string 
    Mobile   bool   
}

func main() {
    var jsonBlob = []byte(`
        {"keyword":"hipaa compliance form", "get_count":157, "engine":"google", "locale":"en-us", "mobile":false}
    `)
    rankings := Rankings{}
    err := json.Unmarshal(jsonBlob, &rankings)
    if err != nil {
        // nozzle.printError("opening config file", err.Error())
    }

    rankingsJson, _ := json.Marshal(rankings)
    err = ioutil.WriteFile("output.json", rankingsJson, 0644)
    fmt.Printf("%+v", rankings)
}

Results in:

{Keyword:hipaa compliance form GetCount:0 Engine:google Locale:en-us Mobile:false}

And the file output is:

{"Keyword":"hipaa compliance form","GetCount":0,"Engine":"google","Locale":"    en-us","Mobile":false}

Running example at http://play.golang.org/p/dC3s37HxvZ

Note: GetCount shows 0, since it was read in as `"get_count"`. If you want to read in JSON that has `"get_count"` vs. `"GetCount"`, but output `"GetCount"` then you'll have to do some additional parsing.

See Go- Copy all common fields between structs for additional info about this particular situation.

Problem

Original source

Related problems

• Go- Copy all common fields between structs