除了总价(totaalprijs)以外,所有这些代码都可以工作。我只是似乎无法使其显示在我的网页上。我认为问题出在if语句周围:“如果aantalpizzas!= 0”,但是我不知道问题所在。总价保存在json文件中,但未在网页上显示。
处理程序:
func bestellingHandler(writer http.ResponseWriter, request *http.Request) {
log.Println("Viewing bestellingen")
bestellingTemplate, _ := template.ParseFiles("./templates/Bestellingen.htm")
// laad de pizza's uit de data file
fmt.Println(request.Method)
fmt.Println(request.Form)
fmt.Println(request.PostFormValue("name"))
filepizza := "./data/pizzas.json"
Readpizza, err := ioutil.ReadFile(filepizza)
var Pizzaslice []Pizza
err = json.Unmarshal(Readpizza, &Pizzaslice)
if err != nil {
panic(err)
}
Pizzamap := make(map[string]PizzaOrder)
var totaalprijs float64
for i := 0; i < (len(Pizzaslice)); i++ {
index := strconv.Itoa(i)
aantalpizzas, _ := strconv.Atoi(request.FormValue("aantal_" + Pizzaslice[i].Name))
prijspizzas, _ := strconv.ParseFloat(request.FormValue("price"+Pizzaslice[i].Name), 64)
if aantalpizzas != 0 {
Pizzamap[index] = PizzaOrder{
Naam: request.FormValue("name" + Pizzaslice[i].Name),
Price: prijspizzas,
Aantal: aantalpizzas,
}
totaalprijs += float64(aantalpizzas) * prijspizzas
}
}
filebestelling := "./data/deck.json"
Readbestelling, err := ioutil.ReadFile(filebestelling)
var klantmap map[string]Klant
err = json.Unmarshal(Readbestelling, &klantmap)
if err != nil {
panic(err)
}
index := strconv.Itoa(len(klantmap))
klantmap[index] = Klant{
Naam: request.FormValue("naam"),
Tussenvoegsel: request.FormValue("tussenv"),
Achternaam: request.FormValue("lname"),
Adres: request.FormValue("adress"),
Telefoonnummer: request.FormValue("phone"),
Postcode: request.FormValue("zipcode"),
Email: request.FormValue("email"),
Status: "Je bestelling wordt bereid",
Totaalprijs: totaalprijs,
Order: Pizzamap,
}
Resultaat, err := json.MarshalIndent(klantmap, "", "\t")
if err != nil {
panic(err)
}
ioutil.WriteFile(filebestelling, Resultaat, 0644)
fmt.Sprintln(klantmap[index])
bestellingTemplate.Execute(writer, klantmap[index])
}
HTML:
<fieldset>
<legend>Je bestelling:</legend>
<ul>
<li>
<p>Naam: {{ .Naam }}<br>
Tussenvoegsel: {{ .Tussenvoegsel }}<br>
Achternaam: {{ .Achternaam }}<br>
E-mail: {{ .Email }}<br>
Telefoonnummer: {{ .Telefoonnummer }}<br>
Status: {{ .Status }}<br>
</p>
<fieldset>
<ul>
{{ range $key, $value := .Order }}
<li>
Pizzanaam: {{ $value.Naam }} <br>
Prijs: €{{ $value.Price | printf "%.2f" }} <br>
Aantal: {{ $value.Aantal }} <br>
</li>
{{ end }}
</ul>
</fieldset>
</p>
</li>
<li>Totaal: €{{ .totaalprijs | printf "%.2f" }}</li>
</ul>
</fieldset>
json文件:
{
"0": {
"Naam": "Lucas",
"Tussenvoegsel": "de",
"Achternaam": "Groot",
"Adres": "Margrietlaan 37",
"Postcode": "6713PL",
"Telefoonnummer": "0617033981",
"Email": "keeperluuk@gmail.com",
"Status": "Je bestelling wordt bereid",
"Totaalprijs": 0,
"Order": {
"0": {
"Naam": "salami",
"Price": 0,
"Aantal": 2
}
}
}
pizzas.json文件:
{
"name":"margherita",
"price": 8.50,
"desc":"tomaten saus, mozzarella en oregano",
"image":"./templates/margherita.png"
},
{
"name":"pepperoni",
"price": 9.25,
"desc":"tomatensaus, mozzarella en pepperoni",
"image":"./templates/pepperoni.png"
}