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main.go
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main.go
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// π Fiber is an Express inspired web framework written in Go with π
// π API Documentation: https://fiber.wiki
// π Github Repository: https://github.com/gofiber/fiber
package main
import (
"database/sql"
"fmt"
"log"
"github.com/gofiber/fiber"
_ "github.com/lib/pq"
)
// Database instance
var db *sql.DB
// Database settings
const (
host = "localhost"
port = 5432 // Default port
user = "postgres"
password = "password"
dbname = "fiber_demo"
)
// Employee struct
type Employee struct {
ID string `json: "id"`
Name string `json: "name"`
Salary string `json: "salary"`
Age string `json: "age"`
}
// Employees struct
type Employees struct {
Employees []Employee `json: "employees"`
}
// Connect function
func Connect() error {
var err error
db, err = sql.Open("postgres", fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable", host, port, user, password, dbname))
if err != nil {
return err
}
if err = db.Ping(); err != nil {
return err
}
return nil
}
func main() {
// Connect with database
if err := Connect(); err != nil {
log.Fatal(err)
}
// Create a Fiber app
app := fiber.New()
// Get all records from postgreSQL
app.Get("/employee", func(c *fiber.Ctx) {
// Insert Employee into database
rows, err := db.Query("SELECT id, name, salary, age FROM employees order by id")
if err != nil {
c.Status(500).Send(err)
return
}
defer rows.Close()
result := Employees{}
for rows.Next() {
employee := Employee{}
err := rows.Scan(&employee.ID, &employee.Name, &employee.Salary, &employee.Age)
// Exit if we get an error
if err != nil {
c.Status(500).Send(err)
return
}
// Append Employee to Employees
result.Employees = append(result.Employees, employee)
}
// Return Employees in JSON format
if err := c.JSON(result); err != nil {
c.Status(500).Send(err)
return
}
})
// Add record into postgreSQL
app.Post("/employee", func(c *fiber.Ctx) {
// New Employee struct
u := new(Employee)
// Parse body into struct
if err := c.BodyParser(u); err != nil {
c.Status(400).Send(err)
return
}
// Insert Employee into database
res, err := db.Query("INSERT INTO employees (name, salry, age)VALUES ($1, $2, $3)", u.Name, u.Salary, u.Age)
if err != nil {
c.Status(500).Send(err)
return
}
// Print result
log.Println(res)
// Return Employee in JSON format
if err := c.JSON(u); err != nil {
c.Status(500).Send(err)
return
}
})
// Update record into postgreSQL
app.Put("/employee", func(c *fiber.Ctx) {
// New Employee struct
u := new(Employee)
// Parse body into struct
if err := c.BodyParser(u); err != nil {
c.Status(400).Send(err)
return
}
// Insert Employee into database
res, err := db.Query("UPDATE employees SET name=$1,salary=$2,age=$3 WHERE id=$5", u.Name, u.Salary, u.Age, u.ID)
if err != nil {
c.Status(500).Send(err)
return
}
// Print result
log.Println(res)
// Return Employee in JSON format
if err := c.Status(201).JSON(u); err != nil {
c.Status(500).Send(err)
return
}
})
// Delete record from postgreSQL
app.Delete("/employee", func(c *fiber.Ctx) {
// New Employee struct
u := new(Employee)
// Parse body into struct
if err := c.BodyParser(u); err != nil {
c.Status(400).Send(err)
return
}
// Insert Employee into database
res, err := db.Query("DELETE FROM employees WHERE id = $1", u.ID)
if err != nil {
c.Status(500).Send(err)
return
}
// Print result
log.Println(res)
// Return Employee in JSON format
if err := c.JSON("Deleted"); err != nil {
c.Status(500).Send(err)
return
}
})
app.Listen(3000)
}