On Sun, 21 Mar 2021 13:37:18 -0700 (PDT)
Hugh Myrie <hugh.my...@gmail.com> wrote:

> I am able to decode the body of a POST request 
> using json.NewDecoder(r.Body)., then save the result to a database. 
> 
> Example:
> 
> type Product struct {
> ID    int  `json:"id"`   
> Description  string  `json:"description"`
> Price   float64 `json:"price"`
> Packsize int `json:"packsize"`
> Count1 int `json:"count1"`
> Bin string `json:"bin"`
> Qoh int `json:"qoh"`
> }
> 
> items := []Product{}
> 
> err := json.NewDecoder(r.Body).Decode(&items)
>     if err != nil {
>         http.Error(w, err.Error(), http.StatusBadRequest)
> fmt.Println("Error occurs here")
> log.Printf(err.Error())
>         return
>     }
> 
> How can I use a nested struct to produce two slices from an incoming 
> (master-detail) POST request, in the form:
> 
> [{receipt: 1, date: '01/01/2021', customer: 'Cash' , subtotal: 10.70,
>  detail: [{receipt: 1, description: 'item1', price: 2.00, qty: 2},
>               {receipt: 1, description: 'item2', price: 2.50, qty: 1},
>               {receipt: 1, description: 'item3', price: 4.20, qty: 1}]
> ]
> 
> I am trying to avoid sending two POST requests, master followed by
> detail.
> 

You can add new field with type is slice of struct inside the Product,
for example,

        Details []ProductDetail `json:"detail"`

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