Implemented first repository using tiedot

repositories/init_database.go

@@ -0,0 +1,37 @@
+package repositories
+
+import (
+	"github.com/HouzuoGuo/tiedot/db"
+	"github.com/astaxie/beego"
+	"sync"
+)
+
+var (
+	_dbInstance *db.DB
+	once sync.Once
+)
+
+func createCollection(name string) *db.Col {
+	col := dbInstance().Use(name)
+	if col != nil {
+		return col
+	}
+	if err := dbInstance().Create(name); err != nil {
+		beego.Error(err)
+	}
+	if err := col.Index([]string{"Id"}); err != nil {
+		beego.Error(name, err)
+	}
+	return col
+}
+
+func dbInstance() *db.DB {
+	once.Do(func() {
+		instance, err := db.OpenDB(beego.AppConfig.String("dbPath"))
+		if err != nil {
+			panic(err)
+		}
+		_dbInstance = instance
+	})
+	return _dbInstance
+}