在Golang iris web 框架里使用数据库
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func main() {
dbinfo := fmt.Sprintf("port=32768 user=%s password=%s dbname=%s sslmode=disable", "postgres", "pass123", "postgres")
db, err := sql.Open("postgres", dbinfo)
if err != nil {
fmt.Printf("err: %+v ", err)
}
defer db.Close()
iris.Get("/people", GetAll(db))
iris.Get("/people/:id", Get(db))
iris.Post("/people/:id", Post(db))
iris.Delete("/people/:id", Delete(db))
iris.Listen(":8000")
}
func GetAll(db *sql.DB) iris.HandlerFunc {
return func(ctx *iris.Context) {
p, err := posts.GetAll(db)
if err != nil {
fmt.Printf("%v", err)
ctx.Error("Failed to load people list", 503)
}
ctx.JSON(200, p)
}
}
func Get(db *sql.DB) iris.HandlerFunc {
return func(ctx *iris.Context) {
ID, err := strconv.Atoi(ctx.Param("id"))
if err != nil {
handleError(ctx, "Failed to load people list", err)
}
p, err := posts.Get(db, ID)
if err != nil {
handleError(ctx, "Failed to load people list", err)
}
ctx.JSON(200, p)
}
}
func Post(db *sql.DB) iris.HandlerFunc {
return func(ctx *iris.Context) {
name := ctx.Param("name")
hobby := ctx.Param("hobby")
err := posts.Post(db, name, hobby)
if err != nil {
handleError(ctx, "Failed to save person", err)
return
}
ctx.Write("ok")
}
}
func Delete(db *sql.DB) iris.HandlerFunc {
return func(ctx *iris.Context) {
ID, err := strconv.Atoi(ctx.Param("id"))
if err != nil {
handleError(ctx, "Failed to load people list", err)
}
err = posts.Delete(db, ID)
if err != nil {
handleError(ctx, "Failed to load people list", err)
}
ctx.Write("ok")
}
}
func handleError(ctx *iris.Context, message string, err error) {
fmt.Printf("%v", err)
ctx.Error(message, 503)
}
// posts/posts.go
func GetAll(db *sql.DB) ([]Person, error) {
rows, err := db.Query("SELECT * FROM people")
if err != nil {
return nil, fmt.Errorf("failed to get people list: %v", err)
}
var people []Person
for rows.Next() {
p, err := readPerson(rows)
if err != nil {
return nil, fmt.Errorf("failed to get people list: %v", err)
}
people = append(people, p)
}
return people, nil
}
func Get(db *sql.DB, ID int) (Person, error) {
rows, err := db.Query("SELECT * FROM people WHERE id = $1", ID)
rows.Next()
if err != nil {
return Person{}, fmt.Errorf("failed to get people list: %v", err)
}
return readPerson(rows)
}
func Post(db *sql.DB, name, hobby string) error {
_, err := db.Query("INSERT INTO people (name, hobby) VALUES ($1, $2)", name, hobby)
return err
}
func Delete(db *sql.DB, ID int) error {
_, err := db.Query("DELETE * FROM people WHERE id = $1", ID)
return err
}
func readPerson(rows *sql.Rows) (Person, error) {
var id int
var name string
var hobby string
err := rows.Scan(&id, &name, &hobby)
if err != nil {
return Person{}, fmt.Errorf("failed to get people list: %v", err)
}
return Person{id, name, hobby}, nil
}
type Person struct {
ID int
Name string
Hobby string
}
iris https://github.com/kataras/iris
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