CODEWITHSUNDEEP
jsongo
danibrum
danibrum

Reputation: 529

Do I need to define the exact same structure of a JSON to use it with json.Unmarshal?

I'm fetching a subreddit and receiving it as a JSON response.

The problem is that the return is kinda big, with lots of fields, but I just want some of them.

The structure is something like:

data.children.data.fields

Children is an array, so I can't access it like that I suppose, but this is just an example.

I pasted the JSON on QuickType to see what it returns me, the structs are big.

Quicktype

So, is there a way I can get only the fields I want to using json.Unmarshal?

Hope someone can help me, thanks in advance!

Upvotes: 0

Views: 789

Answers (1)

srimaln91
srimaln91

Reputation: 1316

You can use a struct with fields that you only want. Look at the example below

package main

import (
    "encoding/json"
    "fmt"
)

type Test struct {
    Field1 int    `json:"field1"`
    Field2 string `json:"field2"`
}

func main() {

    jsonString := `{
    "field1": 1,
    "field2": "test field 2",
    "field3": "test field 3"
}`

    t := Test{}

    err := json.Unmarshal([]byte(jsonString), &t)

    if err != nil {
        fmt.Println(err)
    }

    fmt.Println("\n", t)
}

https://play.golang.org/p/qFLXBiU-fMX

Upvotes: 1

Related Questions