Finish half translation work.

code/rest/download_token_dao.go

@@ -2,6 +2,7 @@ package rest
 
 import (
 	"github.com/eyebluecn/tank/code/core"
+	"github.com/eyebluecn/tank/code/tool/result"
 	"github.com/nu7hatch/gouuid"
 	"time"
 )
@@ -10,31 +11,30 @@ type DownloadTokenDao struct {
 	BaseDao
 }
 
-//按照Id查询
+//find by uuid. if not found return nil.
 func (this *DownloadTokenDao) FindByUuid(uuid string) *DownloadToken {
-
-	// Read
-	var downloadToken = &DownloadToken{}
-	db := core.CONTEXT.GetDB().Where(&DownloadToken{Base: Base{Uuid: uuid}}).First(downloadToken)
+	var entity = &DownloadToken{}
+	db := core.CONTEXT.GetDB().Where("uuid = ?", uuid).First(entity)
 	if db.Error != nil {
-		return nil
+		if db.Error.Error() == result.DB_ERROR_NOT_FOUND {
+			return nil
+		} else {
+			panic(db.Error)
+		}
 	}
-	return downloadToken
+	return entity
 
 }
 
-//按照Id查询
+//find by uuid. if not found panic NotFound error
 func (this *DownloadTokenDao) CheckByUuid(uuid string) *DownloadToken {
-
-	// Read
-	var downloadToken = &DownloadToken{}
-	db := core.CONTEXT.GetDB().Where(&DownloadToken{Base: Base{Uuid: uuid}}).First(downloadToken)
-	this.PanicError(db.Error)
-	return downloadToken
-
+	entity := this.FindByUuid(uuid)
+	if entity == nil {
+		panic(result.NotFound("not found record with uuid = %s", uuid))
+	}
+	return entity
 }
 
-//创建一个session并且持久化到数据库中。
 func (this *DownloadTokenDao) Create(downloadToken *DownloadToken) *DownloadToken {
 
 	timeUUID, _ := uuid.NewV4()
@@ -49,7 +49,6 @@ func (this *DownloadTokenDao) Create(downloadToken *DownloadToken) *DownloadToke
 	return downloadToken
 }
 
-//修改一个downloadToken
 func (this *DownloadTokenDao) Save(downloadToken *DownloadToken) *DownloadToken {
 
 	downloadToken.UpdateTime = time.Now()
@@ -59,9 +58,8 @@ func (this *DownloadTokenDao) Save(downloadToken *DownloadToken) *DownloadToken
 	return downloadToken
 }
 
-//执行清理操作
 func (this *DownloadTokenDao) Cleanup() {
-	this.logger.Info("[DownloadTokenDao]执行清理：清除数据库中所有DownloadToken记录。")
+	this.logger.Info("[DownloadTokenDao] clean up. Delete all DownloadToken")
 	db := core.CONTEXT.GetDB().Where("uuid is not null").Delete(DownloadToken{})
 	this.PanicError(db.Error)
 }