66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
package main
|
|
|
|
import (
|
|
"database/sql"
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
|
|
"github.com/go-sql-driver/mysql"
|
|
)
|
|
|
|
var db *sql.DB
|
|
|
|
type Album struct {
|
|
ID int64
|
|
Title string
|
|
Artist string
|
|
Price float32
|
|
Quantity int64
|
|
}
|
|
|
|
func main() {
|
|
// Capture connection properties.
|
|
cfg := mysql.Config{
|
|
User: os.Getenv("DBUSER"),
|
|
Passwd: os.Getenv("DBPASS"),
|
|
Net: "tcp",
|
|
Addr: "127.0.0.1:3306",
|
|
DBName: "recordings",
|
|
}
|
|
// Get a database handle.
|
|
var err error
|
|
db, err = sql.Open("mysql", cfg.FormatDSN())
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
pingErr := db.Ping()
|
|
if pingErr != nil {
|
|
log.Fatal(pingErr)
|
|
}
|
|
fmt.Println("Connected!")
|
|
|
|
// Hard-code ID 2 here to test the query.
|
|
alb, err := albumByID(2)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
fmt.Printf("Album found: %v\n", alb)
|
|
}
|
|
|
|
// albumByID queries for the album with the specified ID.
|
|
func albumByID(id int64) (Album, error) {
|
|
// An album to hold data from the returned row.
|
|
var alb Album
|
|
|
|
row := db.QueryRow("SELECT * FROM album WHERE id = ?", id)
|
|
if err := row.Scan(&alb.ID, &alb.Title, &alb.Artist, &alb.Price, &alb.Quantity); err != nil {
|
|
if err == sql.ErrNoRows {
|
|
return alb, fmt.Errorf("albumsById %d: no such album", id)
|
|
}
|
|
return alb, fmt.Errorf("albumsById %d: %v", id, err)
|
|
}
|
|
return alb, nil
|
|
}
|