fixed db issues

internal/db/permission.go

@@ -37,7 +37,10 @@ func GetPermissionByName(ctx context.Context, tx bun.Tx, name permissions.Permis
 		Where("name = ?", name).
 		Limit(1).
 		Scan(ctx)
-	if err != nil && err != sql.ErrNoRows {
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, errors.Wrap(err, "tx.NewSelect")
 	}
 	return perm, nil
@@ -56,7 +59,10 @@ func GetPermissionByID(ctx context.Context, tx bun.Tx, id int) (*Permission, err
 		Where("id = ?", id).
 		Limit(1).
 		Scan(ctx)
-	if err != nil && err != sql.ErrNoRows {
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, nil
+		}
 		return nil, errors.Wrap(err, "tx.NewSelect")
 	}
 	return perm, nil
@@ -115,9 +121,22 @@ func CreatePermission(ctx context.Context, tx bun.Tx, perm *Permission) error {
 	if perm == nil {
 		return errors.New("permission cannot be nil")
 	}
+	if perm.Name == "" {
+		return errors.New("name cannot be empty")
+	}
+	if perm.DisplayName == "" {
+		return errors.New("display name cannot be empty")
+	}
+	if perm.Resource == "" {
+		return errors.New("resource cannot be empty")
+	}
+	if perm.Action == "" {
+		return errors.New("action cannot be empty")
+	}
 
 	_, err := tx.NewInsert().
 		Model(perm).
+		Returning("id").
 		Exec(ctx)
 	if err != nil {
 		return errors.Wrap(err, "tx.NewInsert")