fixed error when no autojoinroles are set

cmd_form.go

@@ -9,8 +9,6 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-var fileData []byte
-
 var cmd_form Command = Command{
 	Definition: discordgo.ApplicationCommand{
 		Name:                     "form",

handlers.go

@@ -159,8 +159,11 @@ func messageDelete(s *discordgo.Session, m *discordgo.MessageDelete) { //TODO: a
 }
 
 func guildMemberJoin(s *discordgo.Session, m *discordgo.GuildMemberAdd) {
-	err := s.GuildMemberRoleAdd(m.GuildID, m.User.ID, getAutoJoinRole(m.GuildID, m.User.Bot))
+	role := getAutoJoinRole(m.GuildID, m.User.Bot)
+	if role != "" {
+		err := s.GuildMemberRoleAdd(m.GuildID, m.User.ID, role)
 		if err != nil {
 			logrus.Error(err)
 		}
+	}
 }

manage_data.go

@@ -319,10 +319,18 @@ func getAutoJoinRole(guildID string, isBot bool) string {
 	} else {
 		isBotString = "user"
 	}
-	err := db.QueryRow("SELECT "+isBotString+"_role FROM autojoinroles WHERE guild_id = $1", guildID).Scan(&role)
+	var exists bool
+	err := db.QueryRow("SELECT EXISTS (SELECT 1 FROM autojoinroles WHERE guild_id = $1)", guildID).Scan(&exists)
+	if err != nil {
+		logrus.Error(err)
+		return role
+	}
+	if exists {
+		err = db.QueryRow("SELECT "+isBotString+"_role FROM autojoinroles WHERE guild_id = $1", guildID).Scan(&role)
 		if err != nil {
 			logrus.Error(err, guildID)
 		}
+	}
 	return role
 }