How can I convert a json array to an array of structs? Example:
[
{"name": "Rob"},
{"name": "John"}
]
I'm retrieving the json from a request:
body, err := ioutil.ReadAll(r.Body)
How would I unmarshal this into an array?
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2If your structures start getting complicated or long, this tool may save a few minutes of typing: mholt.github.io/json-to-goMatt– Matt2014-02-24 05:24:55 +00:00Commented Feb 24, 2014 at 5:24
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@Matt: Oh wow! Can't thank you enough for that tool, it's an absolute must for a Go n00b like me!Cimm– Cimm2016-01-31 15:50:23 +00:00Commented Jan 31, 2016 at 15:50
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1 Answer
you simply use json.Unmarshal for this. Example:
import "encoding/json"
// This is the type we define for deserialization.
// You can use map[string]string as well
type User struct {
// The `json` struct tag maps between the json name
// and actual name of the field
Name string `json:"name"`
}
// This functions accepts a byte array containing a JSON
func parseUsers(jsonBuffer []byte) ([]User, error) {
// We create an empty array
users := []User{}
// Unmarshal the json into it. this will use the struct tag
err := json.Unmarshal(jsonBuffer, &users)
if err != nil {
return nil, err
}
// the array is now filled with users
return users, nil
}
