Add isValidPersonalName().

controllers/account.go

@@ -144,6 +144,7 @@ func (c *ApiController) Signup() {
 		Avatar:        organization.DefaultAvatar,
 		Email:         form.Email,
 		Phone:         form.Phone,
+		Address:       []string{},
 		Affiliation:   form.Affiliation,
 		IsAdmin:       false,
 		IsGlobalAdmin: false,

object/check.go

@@ -65,6 +65,10 @@ func CheckUserSignup(application *Application, organization *Organization, usern
 	if application.IsSignupItemVisible("Display name") {
 		if displayName == "" {
 			return "displayName cannot be blank"
+		} else if application.GetSignupItemRule("Display name") == "Personal" {
+			if !isValidPersonalName(displayName) {
+				return "displayName is not valid personal name"
+			}
 		}
 	}
 

object/check_util.go

@@ -0,0 +1,31 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package object
+
+import "regexp"
+
+var rePersonalName *regexp.Regexp
+
+func init() {
+	var err error
+	rePersonalName, err = regexp.Compile("^[\u4E00-\u9FA5]{2,3}(?:·[\u4E00-\u9FA5]{2,3})*$")
+	if err != nil {
+		panic(err)
+	}
+}
+
+func isValidPersonalName(s string) bool {
+	return rePersonalName.MatchString(s)
+}