db: use gorm function to check `ErrRecordNotFound` (#6060)

internal/db/access_tokens.go

@@ -52,7 +52,7 @@ func (db *accessTokens) GetBySHA(sha string) (*AccessToken, error) {
 	token := new(AccessToken)
 	err := db.Where("sha1 = ?", sha).First(token).Error
 	if err != nil {
-		if err == gorm.ErrRecordNotFound {
+		if gorm.IsRecordNotFoundError(err) {
 			return nil, ErrAccessTokenNotExist{args: errutil.Args{"sha": sha}}
 		}
 		return nil, err

internal/db/lfs.go

@@ -107,7 +107,7 @@ func (db *lfs) GetObjectByOID(repoID int64, oid lfsutil.OID) (*LFSObject, error)
 	object := new(LFSObject)
 	err := db.Where("repo_id = ? AND oid = ?", repoID, oid).First(object).Error
 	if err != nil {
-		if err == gorm.ErrRecordNotFound {
+		if gorm.IsRecordNotFoundError(err) {
 			return nil, ErrLFSObjectNotExist{args: errutil.Args{"repoID": repoID, "oid": oid}}
 		}
 		return nil, err

internal/db/login_sources.go

@@ -27,7 +27,7 @@ func (db *loginSources) GetByID(id int64) (*LoginSource, error) {
 	source := new(LoginSource)
 	err := db.Where("id = ?", id).First(source).Error
 	if err != nil {
-		if err == gorm.ErrRecordNotFound {
+		if gorm.IsRecordNotFoundError(err) {
 			return localLoginSources.GetLoginSourceByID(id)
 		}
 		return nil, err

internal/db/repos.go

@@ -29,7 +29,7 @@ func (db *repos) GetByName(ownerID int64, name string) (*Repository, error) {
 	repo := new(Repository)
 	err := db.Where("owner_id = ? AND lower_name = ?", ownerID, strings.ToLower(name)).First(repo).Error
 	if err != nil {
-		if err == gorm.ErrRecordNotFound {
+		if gorm.IsRecordNotFoundError(err) {
 			return nil, ErrRepoNotExist{args: map[string]interface{}{"ownerID": ownerID, "name": name}}
 		}
 		return nil, err

internal/db/users.go

@@ -117,7 +117,7 @@ func (db *users) GetByID(id int64) (*User, error) {
 	user := new(User)
 	err := db.Where("id = ?", id).First(user).Error
 	if err != nil {
-		if err == gorm.ErrRecordNotFound {
+		if gorm.IsRecordNotFoundError(err) {
 			return nil, ErrUserNotExist{args: map[string]interface{}{"userID": id}}
 		}
 		return nil, err
@@ -129,7 +129,7 @@ func (db *users) GetByUsername(username string) (*User, error) {
 	user := new(User)
 	err := db.Where("lower_name = ?", strings.ToLower(username)).First(user).Error
 	if err != nil {
-		if err == gorm.ErrRecordNotFound {
+		if gorm.IsRecordNotFoundError(err) {
 			return nil, ErrUserNotExist{args: map[string]interface{}{"name": username}}
 		}
 		return nil, err