Basic initialization.

main.go

@@ -1,83 +1,47 @@
+/*
+When using xorm, you can create multiple orm engines, an engine means a database.
+ */
 package main
 
 import (
-	_ "github.com/mattn/go-sqlite3"
-	"github.com/go-xorm/xorm"
-	"os"
+	// Core.
 	"fmt"
-	"github.com/go-xorm/core"
-	"github.com/davecgh/go-spew/spew"
-)
-
-type User struct {
-	Id   int64
-	Name string  `xorm:"varchar(25) not null unique 'usr_name'"`
-}
+	"os"
 
-type Article struct {
-	Id   int64
-	Title string  `xorm:"varchar(25) not null unique 'art_title'"`
-}
+	// SQLite 3
+	_ "github.com/mattn/go-sqlite3"
 
-func configureOrm(orm *xorm.Engine) {
-	// Show SQL statement on standard output
-	orm.ShowSQL = true
-	// Show debug infomation on standard output
-	orm.ShowDebug = true
-	// Show error infomation on standard output;
-	orm.ShowErr = true
-	// Show warnning information on standard output;
-	orm.ShowWarn = true
-	// TODO Show which info ?
-	orm.ShowInfo = true
+	// MySQL. Use either driver.
+	// _ "github.com/go-sql-driver/mysql"
+	// _ "github.com/ziutek/mymysql"
 
-	f, err := os.Create("sql.log")
-	if err != nil {
-		println(err.Error())
-		return
-	}
-	orm.Logger = xorm.NewSimpleLogger(f)
+	// PostgreSQL
+	// _ "github.com/lib/pq"
 
-	orm.SetMaxIdleConns(1)
-	orm.SetMaxOpenConns(10)
+	// SQL Server
+	// _ "github.com/lunny/godbc"
 
-	// Set mapper: GonicMapper, SameMapper, SnakeMapper (default).
-	orm.SetMapper(core.SnakeMapper{})
-}
+	// XORM.
+	"github.com/go-xorm/xorm"
 
-func addData(orm *xorm.Engine) {
-	u1 := new(User)
-	u1.Name = "FGM";
-	x, err := orm.Insert(u1)
-	if err != nil {
-		fmt.Println(err)
-		os.Exit(3)
-	}
-	spew.Dump(x, u1)
-}
+	// Others.
+	"github.com/davecgh/go-spew/spew"
+)
 
-func check(e error) {
-	if e != nil {
-		panic(e)
-	}
-}
+var engine *xorm.Engine
 
 func main() {
-	orm, err := xorm.NewEngine("sqlite3", "./test.db")
+	var err error
+
+	// NewEngine parameters are those of the SQL driver: driver and DSN.
+	engine, err := xorm.NewEngine("sqlite3", "./test.db")
 	if err != nil {
 		panic(err)
 		os.Exit(1)
 	}
 	fmt.Println("ORM loaded")
-	configureOrm(orm)
-
-	err = orm.Sync(new(User), new(Article))
-	if err != nil {
-		panic(err)
-		os.Exit(2)
-	}
-	fmt.Println("ORM synced")
 
-	addData(orm)
-	orm.Close()
+	spew.Dump(engine)
+	// Not needed: called automatically on exit.
+	engine.Close()
 }