refactored db code

internal/db/role.go

@@ -77,12 +77,11 @@ func CreateRole(ctx context.Context, tx bun.Tx, role *Role) error {
 	}
 	role.CreatedAt = time.Now().Unix()
 
-	_, err := tx.NewInsert().
-		Model(role).
+	err := Insert(tx, role).
 		Returning("id").
 		Exec(ctx)
 	if err != nil {
-		return errors.Wrap(err, "tx.NewInsert")
+		return errors.Wrap(err, "db.Insert")
 	}
 
 	return nil
@@ -97,12 +96,11 @@ func UpdateRole(ctx context.Context, tx bun.Tx, role *Role) error {
 		return errors.New("role id must be positive")
 	}
 
-	_, err := tx.NewUpdate().
-		Model(role).
+	err := Update(tx, role).
 		WherePK().
 		Exec(ctx)
 	if err != nil {
-		return errors.Wrap(err, "tx.NewUpdate")
+		return errors.Wrap(err, "db.Update")
 	}
 
 	return nil
@@ -128,12 +126,11 @@ func AddPermissionToRole(ctx context.Context, tx bun.Tx, roleID, permissionID in
 		RoleID:       roleID,
 		PermissionID: permissionID,
 	}
-	_, err := tx.NewInsert().
-		Model(rolePerm).
+	err := Insert(tx, rolePerm).
 		On("CONFLICT (role_id, permission_id) DO NOTHING").
 		Exec(ctx)
 	if err != nil {
-		return errors.Wrap(err, "tx.NewInsert")
+		return errors.Wrap(err, "db.Insert")
 	}
 
 	return nil