Template variable not resolving everywhere-CodePudding

I am building a website using Golang templates and needed to display some text in the footer template. It's a variable that resolves in header.html and index.html.

package main

import (
    "fmt"
    "html/template"
    "log"
    "net/http"

    "github.com/gorilla/handlers"
    "github.com/gorilla/mux"
)

type Data struct {
    Title string
    Field1 string
    Field2 template.HTML
    FooterField string
}

var tmpl *template.Template

func main() {
    router := mux.NewRouter()

    port := ":8085"
    data := Data{}
    data.Title = "Title"
    data.FooterField = "This text does not appear in the footer template"

    router.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        err := tmpl.ExecuteTemplate(w, "index", data)
        if err != nil {
            http.Error(w, err.Error(), http.StatusInternalServerError)
        }
    })

    var err error
    tmpl, err = template.ParseGlob("views/*")
    if err != nil {
        panic(err.Error())
    }

    router.PathPrefix("/").HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
        http.FileServer(http.Dir("./static/")).ServeHTTP(res, req)
    })

    fmt.Println("Server running on localhost"   port)

    err = http.ListenAndServe(port, handlers.CompressHandler(router))
    if err != nil {
        log.Fatal(err)
    }
}

And in the ./views I have header.html

{{define "header"}}<!doctype html><html lang="en"><head><meta charset="utf-8"><title>{{.Title}}</title></head><body><h1>Header template</h1><div>{{.FooterField}}</div>{{end}}

index.html

{{define "index"}}{{template "header" . }}
<h1>Index template</h1>
<div>{{.FooterField}}</div>
{{template "footer"}}{{end}}

footer.html

{{define "footer"}}<h1>Footer template</h1>
Missing FooterField->{{.FooterField}}</body></html>{{end}}

And finally the output in the browser on http://localhost:8085/

Header template
This text does not appear in the footer template
Index template
This text does not appear in the footer template
Footer template
Missing FooterField->

This code should be able to be reproduced simply by copying and pasting.

Any clue to what my issue is?

CodePudding user response：

you are not passing anything to the footer template. But you pass . to the header template, so you see the value of .FooterField only there.

In index.html change it to: {{template "footer" . }}