fix bug

internal/models/role.go

@@ -62,6 +62,9 @@ func (r *RoleEntity) ToRoleSimple() *RoleSimple {
 
 func RolesEntityToResponse(rs []*RoleEntity) []*response.RoleResponse {
 	out := make([]*response.RoleResponse, 0)
+	if rs == nil {
+		return out
+	}
 	for _, role := range rs {
 		if role == nil {
 			continue
@@ -73,12 +76,15 @@ func RolesEntityToResponse(rs []*RoleEntity) []*response.RoleResponse {
 
 func RolesEntityToRoleConstant(rs []*RoleSimple) []constants.Role {
 	out := make([]constants.Role, 0)
+	if rs == nil {
+		return out
+	}
 	for _, role := range rs {
 		data, ok := constants.ParseRole(role.Name)
 		if !ok {
 			continue
 		}
-		out= append(out, data)
+		out = append(out, data)
 	}
 	return out
 }