Having played around with Go HTML templates a bit, all the examples I found for looping over objects in templates were passing structs of slices to the template, somewhat like in this example :
type UserList struct {
Id []int
Name []string
}
var templates = template.Must(template.ParseFiles("main.html"))
func rootHandler(w http.ResponseWriter, r *http.Request) {
users := UserList{
Id: []int{0, 1, 2, 3, 4, 5, 6, 7},
Name: []string{"user0", "user1", "user2", "user3", "user4"},
}
templates.ExecuteTemplate(w, "main", &users)
}
with the "main" template being :
{{define "main"}}
{{range .Name}}
{{.}}
{{end}}
{{end}}
This works, but i don't understand how I'm supposed to display each ID just next to its corresponding Name if i'm ranging on the .Name property only. I would find it more logical to treat each user as an object to group its properties when displaying.
Thus my question:
What if I wanted to pass a slice of structs to the template? What would be the syntax to make this work? I haven't found or understood how to in the official html/template doc. I imagined something looking remotely like this:
type User struct {
Id int
Name string
}
type UserList []User
var myuserlist UserList = ...
and a template looking somewhat like this: (syntax here is deliberately wrong, it's just to get understood)
{{define "main"}}
{{for each User from myuserlist as myuser}}
{{myuser.Id}}
{{myuser.Name}}
{{end}}
{{end}}
Use:
{{range .}}
{{.Id}}
{{.Name}}
{{end}}
for the template.
Here is a example: http://play.golang.org/p/A4BPJOcfpB
You need to read more about the "dot" in the package overview to see how to properly use this. http://golang.org/pkg/text/template/#pkg-overview (checkout the Pipelines part)
I don't have the rep to comment, but to answer @ROMANIA_engineer, the source cited by elithrar has been retired, for anyone still looking for this reference :
This book has been removed as it will shortly be published by APress. Please see Network Programming with Go: Essential Skills for Using and Securing Networks
来源:https://stackoverflow.com/questions/24556001/how-to-range-over-slice-of-structs-instead-of-struct-of-slices