convert alias to lowercase when check

models/repo.go

@@ -222,9 +222,10 @@ type Repository struct {
 	CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
 	UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
 
-	Hot    int64 `xorm:"-"`
-	Active int64 `xorm:"-"`
-	Alias  string
+	Hot        int64  `xorm:"-"`
+	Active     int64  `xorm:"-"`
+	Alias      string `xorm:"INDEX"`
+	LowerAlias string `xorm:"INDEX"`
 }
 
 // SanitizedOriginalURL returns a sanitized OriginalURL
@@ -942,10 +943,10 @@ func isRepositoryExist(e Engine, u *User, repoName string, alias string) (bool,
 	cond = cond.And(builder.Eq{"owner_id": u.ID})
 	if alias != "" {
 		subCon := builder.NewCond()
-		subCon = subCon.Or(builder.Eq{"alias": alias}, builder.Eq{"lower_name": repoName})
+		subCon = subCon.Or(builder.Eq{"lower_alias": strings.ToLower(alias)}, builder.Eq{"lower_name": strings.ToLower(repoName)})
 		cond = cond.And(subCon)
 	} else {
-		cond = cond.And(builder.Eq{"lower_name": repoName})
+		cond = cond.And(builder.Eq{"lower_name": strings.ToLower(repoName)})
 	}
 	count, err := e.Where(cond).Count(&Repository{})
 	return count > 0 || com.IsDir(RepoPath(u.Name, repoName)), err
@@ -964,7 +965,7 @@ func IsRepositoryAliasExist(u *User, alias string) (bool, error) {
 func isRepositoryAliasExist(e Engine, u *User, alias string) (bool, error) {
 	var cond = builder.NewCond()
 	cond = cond.And(builder.Eq{"owner_id": u.ID})
-	cond = cond.And(builder.Eq{"alias": alias})
+	cond = cond.And(builder.Eq{"lower_alias": strings.ToLower(alias)})
 	count, err := e.Where(cond).Count(&Repository{})
 	return count > 0, err
 }
@@ -1108,6 +1109,7 @@ func IsUsableRepoAlias(name string) error {
 
 // CreateRepository creates a repository for the user/organization.
 func CreateRepository(ctx DBContext, doer, u *User, repo *Repository) (err error) {
+	repo.LowerAlias = strings.ToLower(repo.Alias)
 	if err = IsUsableRepoName(repo.Name); err != nil {
 		return err
 	}

routers/repo/setting.go

@@ -72,7 +72,7 @@ func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
 
 		newAlias := form.Alias
 		// Check if repository alias has been changed.
-		if repo.Alias != newAlias {
+		if strings.ToLower(repo.Alias) != strings.ToLower(newAlias) {
 			//check new alias is available or not
 			if err := models.IsRepositoryAliasAvailable(ctx.Repo.Owner, newAlias); err != nil {
 				ctx.Data["Err_Alias"] = true
@@ -125,6 +125,7 @@ func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
 		repo.Website = form.Website
 		repo.IsTemplate = form.Template
 		repo.Alias = newAlias
+		repo.LowerAlias = strings.ToLower(newAlias)
 
 		// Visibility of forked repository is forced sync with base repository.
 		if repo.IsFork {