查找方法以获取数据库中返回空数据集的记录

Question

Now, I try to make an API with using GAE+CloudSQL. I made this code.

package main

import (
    "encoding/json"
    "fmt"
    _ "github.com/go-sql-driver/mysql"
    "github.com/jinzhu/gorm"
    "log"
    "net/http"
    "os"
)

type Person struct {
    gorm.Model
    Name string `json:"name"`
    Age  int    `json:"age"`
}

var db *gorm.DB

func main() {
    db = DB()

    http.HandleFunc("/user", func(w http.ResponseWriter, r *http.Request) {
        defer db.Close()
        var people []Person
        db.Find(&people)
        str, _ := json.Marshal(people)
        fmt.Printf("%s
", str)
        return
    })

    port := os.Getenv("PORT")
    if port == "" {
        port = "8080"
        log.Printf("Defaulting to port %s", port)
    }

    log.Printf("Listening on port %s", port)
    log.Fatal(http.ListenAndServe(fmt.Sprintf(":%s", port), nil))
}

func DB() *gorm.DB {
    var (
        connectionName = os.Getenv("CLOUDSQL_CONNECTION_NAME")
        user           = os.Getenv("CLOUDSQL_USER")
        password       = os.Getenv("CLOUDSQL_PASSWORD")
        socket         = os.Getenv("CLOUDSQL_SOCKET_PREFIX")
        databaseName   = os.Getenv("CLOUDSQL_DATABASE_NAME")
        option         = os.Getenv("CLOUDSQL_OPTION")
    )

    if socket == "" {
        socket = "/cloudsql"
    }
    if option == "" {
        option = "?parseTime=true"
    }

    dbURI := fmt.Sprintf("%s:%s@unix(%s/%s)/%s%s", user, password, socket, connectionName, databaseName, option)
    conn, err := gorm.Open("mysql", dbURI)
    if err != nil {
        panic(fmt.Sprintf("DB: %v", err))
    }

    return conn
}

With the help of cloud I can get people data.

people.length is equal to the number of DB datas.

But, what I am getting is

person.Name is "" and person.Age = 0.

I cannot understand why I could not get any data. Please tell me how to fix this issue.