How to use array of objects in golang template?
Question
I have an array of products . Here is my HomeHandler method where gets the list of products and send it to the home.html .
func (f *FrontendServer) HomeHandler(w http.ResponseWriter, h *http.Request) {
products := ListProducts()
parsedTemplate, _ := template.ParseFiles("templates/home.html")
fmt.Printf("type of product %T\n", products)
fmt.Println("PRODUCTS\n", products)
err := parsedTemplate.Execute(w, products)
if err != nil {
log.Fatal("Error executing template:", err)
}
}
This is my home.html file.
<html>
<head>
<meta charset="utf-8">
<title>First Template</title>
<link rel="stylesheet" href="/static/styles/home.css">
</head>
<body>
<ul>
{{range .products}}
<li>
{{$.name}}
</li>
{{end}}
</ul>
</body>
</html>
I have tried bunch of techniques like $.Products , .Products , etc. It gives me an error all the time when I make a request to the homepage as below:
2021/05/17 00:19:26 Error executing template:template: home.html:9:12: executing "home.html" at <.products>: can't evaluate field products in type []main.Product
When I print the products its type is as below.
[{1001 Product 1 A product 12.99} {1002 Product 2 A product 13.99} {1003 Product 3 A product 14.99} {1004 Product 4 A product 15.99} {1005 Product 5 A product 16.99} {1006 Product 6 A product 18.99} {1007 Product 7 A product 19.99} {1008 Product 8 A product 20.99} {1009 Product 9 A product 21.99} {1010 Product 1 A product 22.99}]
And here is my Product struct:
type Product struct {
ID int `json:"product_id"`
Name string `json:"product_name"`
Description string `json:"product_description"`
Price float32 `json:"product_price"`
}
I want to list all products in <li> tags. How can I iterate through all items in this scenario?
1 answers
solution1
3 ACCPTED 2021-05-16 21:30:27
The expression
{{range .products}}
looks for a variable named products in . , where . is the current context, which, at the top level, is the argument to Execute . Based on the error, you are already passing a products array. So, do one of the following:
Either:
{{range .}}
which means, range over the products array passed to Execute , or
err := parsedTemplate.Execute(w, map[string]interface{}{"products":products})
This will create a map containing products , which is an array, so {{range.products}} will work.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.