Go 模板中的嵌套循环
编码器。我需要在 go 模板中呈现嵌套的结构数据。我想知道是否可以在.gohtml模板文件中使用嵌套循环。这是我的.gohtml代码：
<!DOCTYPE html>
<html>
<head>
<meta charser="utf-8" />
<title>Go templates</title>
</head>
<body>
<ul>
{{range $city := .}}
<li>
name: {{$city.name}}
hotels:
<ul>
{{range $hotel := $city.hotels}}
<li>
name: {{$hotel.name}}
address: {{$hotel.address}}
zip: {{$hotel.zip}}
</li>
{{end}}
</ul>
</li>
{{end}}
</ul>
</body>
</html>
这是main.go代码：
package main
import (
"os"
"text/template"
)
var tpl *template.Template
func init() {
tpl = template.Must(template.New("").ParseGlob("./*.gohtml"))
}
func main() {
type hotel struct {
name string
address string
city string
zip int
}
type city struct {
name string
hotels []hotel
}
type region struct {
cities []city
}
hotel1 := hotel{
"Lambda",
"Street 19",
"Some city",
65530,
}
hotel2 := hotel{
"Black Sea",
"Street 21",
"Some city",
65543,
}
hotel3 := hotel{
"Blue Sea",
"Street 15",
"Some city",
54400,
}
hotel4 := hotel{
"Yellow Submarine",
"The Beatles Square",
"Some city",
54401,
}
hotel5 := hotel{
"LolKek",
"Cheburek",
"Some city",
14213,
}
city1 := city{
"Some city",
[]hotel{hotel1, hotel2},
}
city2 := city{
"Some city",
[]hotel{hotel3, hotel4},
}
为什么会被剪掉？
素胚勾勒不出你1回答
-
白板的微信
您看不到任何错误，因为您没有检查错误，而是忽略了它们。Template.ExecuteTemplate()返回错误，请检查它：if err := tpl.ExecuteTemplate(os.Stdout, "tpl.gohtml", someRegion); err != nil { fmt.Println(err)}这将输出：template: :9:29: executing "" at <.>: range can't iterate over {[{Some city [{Lambda Street 19 Some city 65530} {Black Sea Street 21 Some city 65543}]} {Some city [{Blue Sea Street 15 Some city 54400} {Yellow Submarine The Beatles Square Some city 54401}]} {Some city [{LolKek Cheburek Some city 14213}]}]}错误很明显：你传递了一个结构来执行，然后你尝试在它上面进行范围。你不能。切片上的范围：{{range $city := .cities}}这当然行不通：您必须导出结构字段才能在模板中访问它。type region struct { Cities []city}在模板中：{{range $city := .Cities}}您还必须导出其他结构字段：type hotel struct { Name string Address string City string Zip int}type city struct { Name string Hotels []hotel}在这些更改之后，它将工作并输出（在Go Playground上尝试）：<!DOCTYPE html><html> <head> <meta charser="utf-8" /> <title>Go templates</title> </head> <body> <ul> <li> name: Some city hotels: <ul> <li> name: Lambda address: Street 19 zip: 65530 </li> <li> name: Black Sea address: Street 21 zip: 65543 </li> </ul> </li> <li> name: Some city hotels: <ul> <li> name: Blue Sea address: Street 15 zip: 54400 </li> <li> name: Yellow Submarine address: The Beatles Square zip: 54401 </li> </ul> </li> <li> name: Some city hotels: <ul> <li> name: LolKek address: Cheburek zip: 14213 </li> </ul> </li> </ul> </body></html>
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