add permission definition

models/user.go

@@ -116,7 +116,8 @@ func LoginCheck(username string, password string) (string, error) {
 	u := User{}
 
 	// Query database for matching user object
-	err = db.QueryRowx("SELECT * FROM Users WHERE Username=?", username).StructScan(&u)
+	// Use IFNULL to handle situation where a user might not be a member of a group
+	err = db.QueryRowx("SELECT UserId, IFNULL(GroupId, 0) GroupId, UserName, Password, LdapUser, Admin FROM Users WHERE Username=?", username).StructScan(&u)
 
 	if err != nil {
 		if err == sql.ErrNoRows {