How to save multi JSON API response to MongoDB using Golang - go

Question

I am fetching data from an api which comes in this format (10+ individual orders):
{
"orders": [
{
"orderId": "2738183220",
"dateTimeOrderPlaced": "2019-12-11T20:19:19+01:00",
"orderItems": [
{
"orderItemId": "BFC0000347027892",
"ean": "8720165489992",
"cancelRequest": false,
"quantity": 1
}
]
},
{
"orderId": "2737526230",
"dateTimeOrderPlaced": "2019-12-11T17:18:42+01:00",
"orderItems": [
{
"orderItemId": "BFC0000346926381",
"ean": "8719326639581",
"cancelRequest": false,
"quantity": 1
}
]
}
]
}
I have this struct for that:
type OpenOrder struct {
Orders []struct {
OrderID string `json:"orderId"`
DateTimeOrderPlaced time.Time `json:"dateTimeOrderPlaced"`
OrderItems []struct {
OrderItemID string `json:"orderItemId"`
Ean string `json:"ean"`
CancelRequest bool `json:"cancelRequest"`
Quantity int `json:"quantity"`
} `json:"orderItems"`
} `json:"orders"`
}
But I am confused after looking at this for too long. How can I save this into MongoDB with Golang where so it will get saved as single documents? So one document is:
{
"orderId": "2738183220",
"dateTimeOrderPlaced": "2019-12-11T20:19:19+01:00",
"orderItems": [
{
"orderItemId": "BFC0000347027892",
"ean": "8720165489992",
"cancelRequest": false,
"quantity": 1
}
]
}
I wrote this code:
func GetOpenOrder(x string) {
apiURL := "https://api.bol.com/retailer/orders?fulfilment-method=" + x
req, err := http.NewRequest("GET", apiURL, nil)
req.Header.Add("Authorization", "Bearer "+auth.GetToken())
req.Header.Add("Accept", "application/vnd.retailer.v3+json")
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
// Read the response body
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatal(err)
}
err = json.Unmarshal(body, &o)
if err != nil {
fmt.Println(string(body))
}
c := auth.GetClient()
collection := c.Database("goprac").Collection("openorders")
ctx, _ := context.WithTimeout(context.Background(), 5*time.Second)
result, _ := collection.InsertOne(ctx, o)
fmt.Println(result)
}
But right now the whole JSON response gets saved in one document. Can someone please point me in the correct direction? I have been searching SO for the last hour and found some similar questions, but still did not get the answer.