let me start by telling that I'm pretty recent in the Go world.
What I'm trying to do is to read the json I get from a JSON API (I don't control). Everything is working fine, I can show the received ID and Tags too. But the fields field is a little bit different, because its a dynamic array.
I can receive from the api this:
{
"id":"M7DHM98AD2-32E3223F",
"tags": [
{
"id":"9M23X2Z0",
"name":"History"
},
{
"id":"123123123",
"name":"Theory"
}
],
"fields": {
"title":"Title of the item",
"description":"Description of the item"
}
}
Or instead of title
and description
I could receive only description
, or receive another random object like long_title
. The objects return may differ completly and can be an infinite possibility of objects. But it always returns objects with a key and a string content like in the example.
This is my code so far:
type Item struct {
ID string `json:"id"`
Tags []Tag `json:"tags"`
//Fields []Field `json:"fields"`
}
// Tag data from the call
type Tag struct {
ID string `json:"id"`
Name string `json:"name"`
}
// AllEntries gets all entries from the session
func AllEntries() {
resp, _ := client.Get(APIURL)
body, _ := ioutil.ReadAll(resp.Body)
item := new(Item)
_ = json.Unmarshal(body, &item)
fmt.Println(i, "->", item.ID)
}
So the Item.Fields is dynamic, there is no way to predict what will be the key names, and therefore as far I can tell, there is no way to create a struct for it. But again, I'm pretty newbie with Go, could someone give me any tips? Thanks
If the data in
"fields"
is always going to be a flat-dict then you can usemap[string]string
as type for theFields
.For arbitrary data specify
Fields
as aRawMessage
type and parse it later on based on its content. Example from docs: https://play.golang.org/p/IR1_O87SHvIf the fields are way too unpredictable then you can keep this field as is(
[]byte
) or if there are fields that are always going to common then you can parse those and leave the rest(but this would result in loss of data present in other fields).