gin and gorm api example

main.go

// cf. https://medium.com/@etiennerouzeaud/how-to-create-a-basic-restful-api-in-go-c8e032ba3181#.8bappfeoh
package main

import (
	"time"

	"github.com/gin-gonic/gin"
	_ "github.com/go-sql-driver/mysql"
	"github.com/jinzhu/gorm"
)

type Temperature struct {
	Id          int       `gorm:"AUTO_INCREMENT" json:"id"`
	Temperature float64   `gorm:"not null" json:"temperature"`
	Humidity    float64   `gorm:"not null" json:"humidity"`
	Created_at  time.Time `json:"created_at"`
}

func InitDb() *gorm.DB {
	// Openning file
	db, err := gorm.Open("mysql", "user:password@/database?charset=utf8&parseTime=True&loc=Local")
	// Display SQL queries
	db.LogMode(true)

	// Error
	if err != nil {
		panic(err)
	}
	return db
}

func main() {
	router := gin.Default()
	router.Use(Cors())
	v1 := router.Group("api/v1")
	{
		v1.POST("/temperatures", createTemp)
		v1.GET("/temperatures", getTemps)
	}
	router.Run(":1323")
}

// HandlerFunc
func getTemps(c *gin.Context) {
	db := InitDb()
	defer db.Close()

	var temperatures []Temperature
	// SELECT * FROM temperatures
	db.Find(&temperatures)

	c.JSON(200, temperatures)
}

func createTemp(c *gin.Context) {
	db := InitDb()
	defer db.Close()

	var temperature Temperature
	c.Bind(&temperature)
	db.Create(&temperature)
	c.JSON(201, gin.H{"success": temperature})
}

func Cors() gin.HandlerFunc {
	return func(c *gin.Context) {
		c.Writer.Header().Add("Access-Control-Allow-Origin", "*")
		c.Next()
	}
}