diff --git a/models/issue_comment.go b/models/issue_comment.go
index b8ab8c23eb6..124314ef384 100644
--- a/models/issue_comment.go
+++ b/models/issue_comment.go
@@ -23,8 +23,8 @@ type CommentType int
 
 const (
 	// Plain comment, can be associated with a commit (CommitID > 0) and a line (LineNum > 0)
-	COMMENT_TYPE_COMMENT CommentType = iota
-	COMMENT_TYPE_REOPEN
+	CommentTypeComment CommentType = iota
+	CommentTypeReopen
 	COMMENT_TYPE_CLOSE
 
 	// References.
@@ -32,7 +32,7 @@ const (
 	// Reference from a commit (not part of a pull request)
 	COMMENT_TYPE_COMMIT_REF
 	// Reference from a comment
-	COMMENT_TYPE_COMMENT_REF
+	CommentTypeComment_REF
 	// Reference from a pull request
 	COMMENT_TYPE_PULL_REF
 )
@@ -40,9 +40,9 @@ const (
 type CommentTag int
 
 const (
-	COMMENT_TAG_NONE CommentTag = iota
-	COMMENT_TAG_POSTER
-	COMMENT_TAG_WRITER
+	CommentTagNone CommentTag = iota
+	CommentTagPoster
+	CommentTagWriter
 	COMMENT_TAG_OWNER
 )
 
@@ -187,7 +187,7 @@ func createComment(e *xorm.Session, opts *CreateCommentOptions) (_ *Comment, err
 
 	// Check comment type.
 	switch opts.Type {
-	case COMMENT_TYPE_COMMENT:
+	case CommentTypeComment:
 		act.OpType = ActionCommentIssue
 
 		if _, err = e.Exec("UPDATE `issue` SET num_comments=num_comments+1 WHERE id=?", opts.Issue.ID); err != nil {
@@ -216,7 +216,7 @@ func createComment(e *xorm.Session, opts *CreateCommentOptions) (_ *Comment, err
 			}
 		}
 
-	case COMMENT_TYPE_REOPEN:
+	case CommentTypeReopen:
 		act.OpType = ActionReopenIssue
 		if opts.Issue.IsPull {
 			act.OpType = ActionReopenPullRequest
@@ -262,7 +262,7 @@ func createComment(e *xorm.Session, opts *CreateCommentOptions) (_ *Comment, err
 func createStatusComment(e *xorm.Session, doer *User, repo *Repository, issue *Issue) (*Comment, error) {
 	cmtType := COMMENT_TYPE_CLOSE
 	if !issue.IsClosed {
-		cmtType = COMMENT_TYPE_REOPEN
+		cmtType = CommentTypeReopen
 	}
 	return createComment(e, &CreateCommentOptions{
 		Type:  cmtType,
@@ -304,7 +304,7 @@ func CreateComment(opts *CreateCommentOptions) (comment *Comment, err error) {
 // CreateIssueComment creates a plain issue comment.
 func CreateIssueComment(doer *User, repo *Repository, issue *Issue, content string, attachments []string) (*Comment, error) {
 	return CreateComment(&CreateCommentOptions{
-		Type:        COMMENT_TYPE_COMMENT,
+		Type:        CommentTypeComment,
 		Doer:        doer,
 		Repo:        repo,
 		Issue:       issue,
@@ -403,7 +403,7 @@ func DeleteCommentByID(id int64) error {
 		return err
 	}
 
-	if comment.Type == COMMENT_TYPE_COMMENT {
+	if comment.Type == CommentTypeComment {
 		if _, err = sess.Exec("UPDATE `issue` SET num_comments = num_comments - 1 WHERE id = ?", comment.IssueID); err != nil {
 			return err
 		}
diff --git a/models/login_source.go b/models/login_source.go
index c9a0c737640..20cd89899b5 100644
--- a/models/login_source.go
+++ b/models/login_source.go
@@ -28,16 +28,16 @@ type LoginType int
 
 // Note: new type must append to the end of list to maintain compatibility.
 const (
-	LOGIN_NOTYPE LoginType = iota
-	LOGIN_PLAIN            // 1
-	LOGIN_LDAP             // 2
+	LoginNotype LoginType = iota
+	LoginPlain            // 1
+	LoginLdap             // 2
 	LOGIN_SMTP             // 3
 	LOGIN_PAM              // 4
 	LOGIN_DLDAP            // 5
 )
 
 var LoginNames = map[LoginType]string{
-	LOGIN_LDAP:  "LDAP (via BindDN)",
+	LoginLdap:  "LDAP (via BindDN)",
 	LOGIN_DLDAP: "LDAP (simple auth)", // Via direct bind
 	LOGIN_SMTP:  "SMTP",
 	LOGIN_PAM:   "PAM",
@@ -139,7 +139,7 @@ func (source *LoginSource) BeforeSet(colName string, val xorm.Cell) {
 	switch colName {
 	case "type":
 		switch LoginType(Cell2Int64(val)) {
-		case LOGIN_LDAP, LOGIN_DLDAP:
+		case LoginLdap, LOGIN_DLDAP:
 			source.Cfg = new(LDAPConfig)
 		case LOGIN_SMTP:
 			source.Cfg = new(SMTPConfig)
@@ -165,7 +165,7 @@ func (source *LoginSource) TypeName() string {
 }
 
 func (source *LoginSource) IsLDAP() bool {
-	return source.Type == LOGIN_LDAP
+	return source.Type == LoginLdap
 }
 
 func (source *LoginSource) IsDLDAP() bool {
@@ -188,7 +188,7 @@ func (source *LoginSource) HasTLS() bool {
 
 func (source *LoginSource) UseTLS() bool {
 	switch source.Type {
-	case LOGIN_LDAP, LOGIN_DLDAP:
+	case LoginLdap, LOGIN_DLDAP:
 		return source.LDAP().SecurityProtocol != ldap.SECURITY_PROTOCOL_UNENCRYPTED
 	case LOGIN_SMTP:
 		return source.SMTP().TLS
@@ -199,7 +199,7 @@ func (source *LoginSource) UseTLS() bool {
 
 func (source *LoginSource) SkipVerify() bool {
 	switch source.Type {
-	case LOGIN_LDAP, LOGIN_DLDAP:
+	case LoginLdap, LOGIN_DLDAP:
 		return source.LDAP().SkipVerify
 	case LOGIN_SMTP:
 		return source.SMTP().SkipVerify
@@ -358,11 +358,11 @@ func (auth *smtpLoginAuth) Next(fromServer []byte, more bool) ([]byte, error) {
 }
 
 const (
-	SMTP_PLAIN = "PLAIN"
-	SMTP_LOGIN = "LOGIN"
+	SmtpPlain = "PLAIN"
+	SmtpLogin = "LOGIN"
 )
 
-var SMTPAuths = []string{SMTP_PLAIN, SMTP_LOGIN}
+var SMTPAuths = []string{SmtpPlain, SmtpLogin}
 
 func SMTPAuth(a smtp.Auth, cfg *SMTPConfig) error {
 	c, err := smtp.Dial(fmt.Sprintf("%s:%d", cfg.Host, cfg.Port))
@@ -411,9 +411,9 @@ func LoginViaSMTP(user *User, login, password string, sourceID int64, cfg *SMTPC
 	}
 
 	var auth smtp.Auth
-	if cfg.Auth == SMTP_PLAIN {
+	if cfg.Auth == SmtpPlain {
 		auth = smtp.PlainAuth("", login, password, cfg.Host)
-	} else if cfg.Auth == SMTP_LOGIN {
+	} else if cfg.Auth == SmtpLogin {
 		auth = &smtpLoginAuth{login, password}
 	} else {
 		return nil, errors.New("Unsupported SMTP auth type")
@@ -493,7 +493,7 @@ func ExternalUserLogin(user *User, login, password string, source *LoginSource,
 	}
 
 	switch source.Type {
-	case LOGIN_LDAP, LOGIN_DLDAP:
+	case LoginLdap, LOGIN_DLDAP:
 		return LoginViaLDAP(user, login, password, source, autoRegister)
 	case LOGIN_SMTP:
 		return LoginViaSMTP(user, login, password, source.ID, source.Cfg.(*SMTPConfig), autoRegister)
@@ -520,7 +520,7 @@ func UserSignIn(username, passowrd string) (*User, error) {
 
 	if hasUser {
 		switch user.LoginType {
-		case LOGIN_NOTYPE, LOGIN_PLAIN:
+		case LoginNotype, LoginPlain:
 			if user.ValidatePassword(passowrd) {
 				return user, nil
 			}
diff --git a/models/mail.go b/models/mail.go
index df5fd789bc1..77856553cbf 100644
--- a/models/mail.go
+++ b/models/mail.go
@@ -20,9 +20,9 @@ import (
 )
 
 const (
-	MAIL_AUTH_ACTIVATE        base.TplName = "auth/activate"
-	MAIL_AUTH_ACTIVATE_EMAIL  base.TplName = "auth/activate_email"
-	MAIL_AUTH_RESET_PASSWORD  base.TplName = "auth/reset_passwd"
+	MailAuthActivate        base.TplName = "auth/activate"
+	MailAuthActivateEmail  base.TplName = "auth/activate_email"
+	MailAuthResetPassword  base.TplName = "auth/reset_passwd"
 	MAIL_AUTH_REGISTER_NOTIFY base.TplName = "auth/register_notify"
 
 	MAIL_ISSUE_COMMENT base.TplName = "issue/comment"
@@ -77,11 +77,11 @@ func SendUserMail(c *macaron.Context, u *User, tpl base.TplName, code, subject,
 }
 
 func SendActivateAccountMail(c *macaron.Context, u *User) {
-	SendUserMail(c, u, MAIL_AUTH_ACTIVATE, u.GenerateActivateCode(), c.Tr("mail.activate_account"), "activate account")
+	SendUserMail(c, u, MailAuthActivate, u.GenerateActivateCode(), c.Tr("mail.activate_account"), "activate account")
 }
 
 func SendResetPasswordMail(c *macaron.Context, u *User) {
-	SendUserMail(c, u, MAIL_AUTH_RESET_PASSWORD, u.GenerateActivateCode(), c.Tr("mail.reset_password"), "reset password")
+	SendUserMail(c, u, MailAuthResetPassword, u.GenerateActivateCode(), c.Tr("mail.reset_password"), "reset password")
 }
 
 // SendActivateAccountMail sends confirmation email.
@@ -92,7 +92,7 @@ func SendActivateEmailMail(c *macaron.Context, u *User, email *EmailAddress) {
 		"Code":            u.GenerateEmailActivateCode(email.Email),
 		"Email":           email.Email,
 	}
-	body, err := mailRender.HTMLString(string(MAIL_AUTH_ACTIVATE_EMAIL), data)
+	body, err := mailRender.HTMLString(string(MailAuthActivateEmail), data)
 	if err != nil {
 		log.Error(3, "HTMLString: %v", err)
 		return
diff --git a/models/user.go b/models/user.go
index dcb2311cf69..ba41a392cba 100644
--- a/models/user.go
+++ b/models/user.go
@@ -140,9 +140,9 @@ func (u *User) APIFormat() *api.User {
 	}
 }
 
-// returns true if user login type is LOGIN_PLAIN.
+// returns true if user login type is LoginPlain.
 func (u *User) IsLocal() bool {
-	return u.LoginType <= LOGIN_PLAIN
+	return u.LoginType <= LoginPlain
 }
 
 // HasForkedRepo checks if user has already forked a repository with given ID.
diff --git a/routers/admin/auths.go b/routers/admin/auths.go
index dcd9a225a79..44fe0ee9fbd 100644
--- a/routers/admin/auths.go
+++ b/routers/admin/auths.go
@@ -48,7 +48,7 @@ type dropdownItem struct {
 
 var (
 	authSources = []dropdownItem{
-		{models.LoginNames[models.LOGIN_LDAP], models.LOGIN_LDAP},
+		{models.LoginNames[models.LoginLdap], models.LoginLdap},
 		{models.LoginNames[models.LOGIN_DLDAP], models.LOGIN_DLDAP},
 		{models.LoginNames[models.LOGIN_SMTP], models.LOGIN_SMTP},
 		{models.LoginNames[models.LOGIN_PAM], models.LOGIN_PAM},
@@ -65,8 +65,8 @@ func NewAuthSource(ctx *context.Context) {
 	ctx.Data["PageIsAdmin"] = true
 	ctx.Data["PageIsAdminAuthentications"] = true
 
-	ctx.Data["type"] = models.LOGIN_LDAP
-	ctx.Data["CurrentTypeName"] = models.LoginNames[models.LOGIN_LDAP]
+	ctx.Data["type"] = models.LoginLdap
+	ctx.Data["CurrentTypeName"] = models.LoginNames[models.LoginLdap]
 	ctx.Data["CurrentSecurityProtocol"] = models.SecurityProtocolNames[ldap.SECURITY_PROTOCOL_UNENCRYPTED]
 	ctx.Data["smtp_auth"] = "PLAIN"
 	ctx.Data["is_active"] = true
@@ -125,7 +125,7 @@ func NewAuthSourcePost(ctx *context.Context, form auth.AuthenticationForm) {
 	hasTLS := false
 	var config core.Conversion
 	switch models.LoginType(form.Type) {
-	case models.LOGIN_LDAP, models.LOGIN_DLDAP:
+	case models.LoginLdap, models.LOGIN_DLDAP:
 		config = parseLDAPConfig(form)
 		hasTLS = ldap.SecurityProtocol(form.SecurityProtocol) > ldap.SECURITY_PROTOCOL_UNENCRYPTED
 	case models.LOGIN_SMTP:
@@ -208,7 +208,7 @@ func EditAuthSourcePost(ctx *context.Context, form auth.AuthenticationForm) {
 
 	var config core.Conversion
 	switch models.LoginType(form.Type) {
-	case models.LOGIN_LDAP, models.LOGIN_DLDAP:
+	case models.LoginLdap, models.LOGIN_DLDAP:
 		config = parseLDAPConfig(form)
 	case models.LOGIN_SMTP:
 		config = parseSMTPConfig(form)
diff --git a/routers/admin/users.go b/routers/admin/users.go
index 0eaa3c995c0..404d5ec3b1a 100644
--- a/routers/admin/users.go
+++ b/routers/admin/users.go
@@ -81,7 +81,7 @@ func NewUserPost(ctx *context.Context, form auth.AdminCrateUserForm) {
 		Email:     form.Email,
 		Passwd:    form.Password,
 		IsActive:  true,
-		LoginType: models.LOGIN_PLAIN,
+		LoginType: models.LoginPlain,
 	}
 
 	if len(form.LoginType) > 0 {
diff --git a/routers/api/v1/admin/user.go b/routers/api/v1/admin/user.go
index 1234dbf0c70..5e9f763eebe 100644
--- a/routers/api/v1/admin/user.go
+++ b/routers/api/v1/admin/user.go
@@ -42,7 +42,7 @@ func CreateUser(ctx *context.APIContext, form api.CreateUserOption) {
 		Email:     form.Email,
 		Passwd:    form.Password,
 		IsActive:  true,
-		LoginType: models.LOGIN_PLAIN,
+		LoginType: models.LoginPlain,
 	}
 
 	parseLoginSource(ctx, u, form.SourceID, form.LoginName)
diff --git a/routers/api/v1/repo/issue_comment.go b/routers/api/v1/repo/issue_comment.go
index 28751008da7..11e236144cf 100644
--- a/routers/api/v1/repo/issue_comment.go
+++ b/routers/api/v1/repo/issue_comment.go
@@ -68,7 +68,7 @@ func EditIssueComment(ctx *context.APIContext, form api.EditIssueCommentOption)
 	if !ctx.IsSigned || (ctx.User.ID != comment.PosterID && !ctx.Repo.IsAdmin()) {
 		ctx.Status(403)
 		return
-	} else if comment.Type != models.COMMENT_TYPE_COMMENT {
+	} else if comment.Type != models.CommentTypeComment {
 		ctx.Status(204)
 		return
 	}
diff --git a/routers/repo/issue.go b/routers/repo/issue.go
index 9dff643ea47..d3a91c84cc5 100644
--- a/routers/repo/issue.go
+++ b/routers/repo/issue.go
@@ -599,7 +599,7 @@ func ViewIssue(ctx *context.Context) {
 	// Render comments and and fetch participants.
 	participants[0] = issue.Poster
 	for _, comment = range issue.Comments {
-		if comment.Type == models.COMMENT_TYPE_COMMENT {
+		if comment.Type == models.CommentTypeComment {
 			comment.RenderedContent = string(markdown.Render([]byte(comment.Content), ctx.Repo.RepoLink,
 				ctx.Repo.Repository.ComposeMetas()))
 
@@ -614,9 +614,9 @@ func ViewIssue(ctx *context.Context) {
 				(repo.Owner.IsOrganization() && repo.Owner.IsOwnedBy(comment.PosterID)) {
 				comment.ShowTag = models.COMMENT_TAG_OWNER
 			} else if comment.Poster.IsWriterOfRepo(repo) {
-				comment.ShowTag = models.COMMENT_TAG_WRITER
+				comment.ShowTag = models.CommentTagWriter
 			} else if comment.PosterID == issue.PosterID {
-				comment.ShowTag = models.COMMENT_TAG_POSTER
+				comment.ShowTag = models.CommentTagPoster
 			}
 
 			marked[comment.PosterID] = comment.ShowTag
@@ -892,7 +892,7 @@ func UpdateCommentContent(ctx *context.Context) {
 	if !ctx.IsSigned || (ctx.User.ID != comment.PosterID && !ctx.Repo.IsAdmin()) {
 		ctx.Error(403)
 		return
-	} else if comment.Type != models.COMMENT_TYPE_COMMENT {
+	} else if comment.Type != models.CommentTypeComment {
 		ctx.Error(204)
 		return
 	}
@@ -924,7 +924,7 @@ func DeleteComment(ctx *context.Context) {
 	if !ctx.IsSigned || (ctx.User.ID != comment.PosterID && !ctx.Repo.IsAdmin()) {
 		ctx.Error(403)
 		return
-	} else if comment.Type != models.COMMENT_TYPE_COMMENT {
+	} else if comment.Type != models.CommentTypeComment {
 		ctx.Error(204)
 		return
 	}