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How to transfer value from MySQL to a template

This structure passes the value to the template.

type Entry struct {
    Name, Mes string
}

This function to process with HandleFunc("/", mysqlWithTempl)

func mysqlWithTempl(w http.ResponseWriter, r *http.Request) {

    // Open database
    con, err := sql.Open("mymysql", dbName+"/"+dbUserName+"/"+dbPassword)
    if err != nil {
        panic(err)
    }

    // Close database 
    defer con.Close()

    //query
    rows, err := con.Query("select name, message from entry")

    tRes := Entry{}

    //fetch result
    for rows.Next() {
        var name, message string
        rows.Scan(&name, &message)
        tRes.Name = name
        tRes.Mes = message
    }
    index.Execute(w, tRes)
}

and this template

<!DOCTYPE html>
<html>
    <head>
        <title> Test </title>
    </head>
    <body>
        <section id="contents">
        <p> {{.Mes}} {{.Name}} </p>
       </section>
    </body>
</html>

my question is how to get a larger value from mysql and pass it to the template

Upon attempt

 for rows.Next() {
            var name, message string
            rows.Scan(&name, &message)
            tRes.Name = name
            tRes.Mes = message
index.Execute(w, tRes)
        }

the whole result is obtained, but every thing is repeated

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1 answer

I think you may ask how to show several results?

If so, you want to copy all your lines into a fragment like this:

results := []Entry
for rows.Next() {
    var name, message string
    rows.Scan(&name, &message)
    tRes.Name = name
    tRes.Mes = message
    results = append(results, tRes)
}
index.Execute(w, results)

Then your template will change like this:

<!DOCTYPE html>
<html>
    <head>
        <title> Test </title>
    </head>
    <body>
        <section id="contents">
        {{range .}}
        <p> {{.Mes}} {{.Name}} </p>
        {{end}}
       </section>
    </body>
</html>

I believe this will cause one to <p> {{.Mess}} {{.Name}} </p>be run for every row returned by your mysql query.

I really have not tested this code, although it might have errors.

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