Remove NewSession method from db.Engine interface (#17577)

* Remove NewSession method from db.Engine interface

* Fix bug

* Some improvements

* Fix bug

* Fix test

* Use XXXBean instead of XXXExample

models/repo.go

@@ -1276,17 +1276,17 @@ func ChangeRepositoryName(doer *User, repo *Repository, newRepoName string) (err
 		}
 	}
 
-	sess := db.NewSession(db.DefaultContext)
-	defer sess.Close()
-	if err = sess.Begin(); err != nil {
-		return fmt.Errorf("sess.Begin: %v", err)
+	ctx, committer, err := db.TxContext()
+	if err != nil {
+		return err
 	}
+	defer committer.Close()
 
-	if err := newRepoRedirect(sess, repo.Owner.ID, repo.ID, oldRepoName, newRepoName); err != nil {
+	if err := newRepoRedirect(db.GetEngine(ctx), repo.Owner.ID, repo.ID, oldRepoName, newRepoName); err != nil {
 		return err
 	}
 
-	return sess.Commit()
+	return committer.Commit()
 }
 
 func getRepositoriesByForkID(e db.Engine, forkID int64) ([]*Repository, error) {
@@ -1367,17 +1367,17 @@ func UpdateRepositoryCtx(ctx context.Context, repo *Repository, visibilityChange
 
 // UpdateRepository updates a repository
 func UpdateRepository(repo *Repository, visibilityChanged bool) (err error) {
-	sess := db.NewSession(db.DefaultContext)
-	defer sess.Close()
-	if err = sess.Begin(); err != nil {
+	ctx, committer, err := db.TxContext()
+	if err != nil {
 		return err
 	}
+	defer committer.Close()
 
-	if err = updateRepository(sess, repo, visibilityChanged); err != nil {
+	if err = updateRepository(db.GetEngine(ctx), repo, visibilityChanged); err != nil {
 		return fmt.Errorf("updateRepository: %v", err)
 	}
 
-	return sess.Commit()
+	return committer.Commit()
 }
 
 // UpdateRepositoryOwnerNames updates repository owner_names (this should only be used when the ownerName has changed case)
@@ -1385,19 +1385,19 @@ func UpdateRepositoryOwnerNames(ownerID int64, ownerName string) error {
 	if ownerID == 0 {
 		return nil
 	}
-	sess := db.NewSession(db.DefaultContext)
-	defer sess.Close()
-	if err := sess.Begin(); err != nil {
+	ctx, committer, err := db.TxContext()
+	if err != nil {
 		return err
 	}
+	defer committer.Close()
 
-	if _, err := sess.Where("owner_id = ?", ownerID).Cols("owner_name").Update(&Repository{
+	if _, err := db.GetEngine(ctx).Where("owner_id = ?", ownerID).Cols("owner_name").Update(&Repository{
 		OwnerName: ownerName,
 	}); err != nil {
 		return err
 	}
 
-	return sess.Commit()
+	return committer.Commit()
 }
 
 // UpdateRepositoryUpdatedTime updates a repository's updated time
@@ -1408,38 +1408,39 @@ func UpdateRepositoryUpdatedTime(repoID int64, updateTime time.Time) error {
 
 // UpdateRepositoryUnits updates a repository's units
 func UpdateRepositoryUnits(repo *Repository, units []RepoUnit, deleteUnitTypes []unit.Type) (err error) {
-	sess := db.NewSession(db.DefaultContext)
-	defer sess.Close()
-	if err = sess.Begin(); err != nil {
+	ctx, committer, err := db.TxContext()
+	if err != nil {
 		return err
 	}
+	defer committer.Close()
 
 	// Delete existing settings of units before adding again
 	for _, u := range units {
 		deleteUnitTypes = append(deleteUnitTypes, u.Type)
 	}
 
-	if _, err = sess.Where("repo_id = ?", repo.ID).In("type", deleteUnitTypes).Delete(new(RepoUnit)); err != nil {
+	if _, err = db.GetEngine(ctx).Where("repo_id = ?", repo.ID).In("type", deleteUnitTypes).Delete(new(RepoUnit)); err != nil {
 		return err
 	}
 
 	if len(units) > 0 {
-		if _, err = sess.Insert(units); err != nil {
+		if err = db.Insert(ctx, units); err != nil {
 			return err
 		}
 	}
 
-	return sess.Commit()
+	return committer.Commit()
 }
 
 // DeleteRepository deletes a repository for a user or organization.
 // make sure if you call this func to close open sessions (sqlite will otherwise get a deadlock)
 func DeleteRepository(doer *User, uid, repoID int64) error {
-	sess := db.NewSession(db.DefaultContext)
-	defer sess.Close()
-	if err := sess.Begin(); err != nil {
+	ctx, committer, err := db.TxContext()
+	if err != nil {
 		return err
 	}
+	defer committer.Close()
+	sess := db.GetEngine(ctx)
 
 	// In case is a organization.
 	org, err := getUserByID(sess, uid)
@@ -1639,11 +1640,11 @@ func DeleteRepository(doer *User, uid, repoID int64) error {
 		return err
 	}
 
-	if err = sess.Commit(); err != nil {
+	if err = committer.Commit(); err != nil {
 		return err
 	}
 
-	sess.Close()
+	committer.Close()
 
 	// We should always delete the files after the database transaction succeed. If
 	// we delete the file but the database rollback, the repository will be broken.
@@ -1769,15 +1770,14 @@ func GetUserRepositories(opts *SearchRepoOptions) ([]*Repository, int64, error)
 		cond = cond.And(builder.In("lower_name", opts.LowerNames))
 	}
 
-	sess := db.NewSession(db.DefaultContext)
-	defer sess.Close()
+	sess := db.GetEngine(db.DefaultContext)
 
 	count, err := sess.Where(cond).Count(new(Repository))
 	if err != nil {
 		return nil, 0, fmt.Errorf("Count: %v", err)
 	}
 
-	sess.Where(cond).OrderBy(opts.OrderBy.String())
+	sess = sess.Where(cond).OrderBy(opts.OrderBy.String())
 	repos := make([]*Repository, 0, opts.PageSize)
 	return repos, count, db.SetSessionPagination(sess, opts).Find(&repos)
 }
@@ -2136,32 +2136,36 @@ func (repo *Repository) GetTrustModel() TrustModelType {
 	return trustModel
 }
 
+func updateUserStarNumbers(users []User) error {
+	ctx, committer, err := db.TxContext()
+	if err != nil {
+		return err
+	}
+	defer committer.Close()
+
+	for _, user := range users {
+		if _, err = db.Exec(ctx, "UPDATE `user` SET num_stars=(SELECT COUNT(*) FROM `star` WHERE uid=?) WHERE id=?", user.ID, user.ID); err != nil {
+			return err
+		}
+	}
+
+	return committer.Commit()
+}
+
 // DoctorUserStarNum recalculate Stars number for all user
 func DoctorUserStarNum() (err error) {
 	const batchSize = 100
-	sess := db.NewSession(db.DefaultContext)
-	defer sess.Close()
 
 	for start := 0; ; start += batchSize {
 		users := make([]User, 0, batchSize)
-		if err = sess.Limit(batchSize, start).Where("type = ?", 0).Cols("id").Find(&users); err != nil {
+		if err = db.GetEngine(db.DefaultContext).Limit(batchSize, start).Where("type = ?", 0).Cols("id").Find(&users); err != nil {
 			return
 		}
 		if len(users) == 0 {
 			break
 		}
 
-		if err = sess.Begin(); err != nil {
-			return
-		}
-
-		for _, user := range users {
-			if _, err = sess.Exec("UPDATE `user` SET num_stars=(SELECT COUNT(*) FROM `star` WHERE uid=?) WHERE id=?", user.ID, user.ID); err != nil {
-				return
-			}
-		}
-
-		if err = sess.Commit(); err != nil {
+		if err = updateUserStarNumbers(users); err != nil {
 			return
 		}
 	}