GoToSocial/internal/db/bundb/migrations/20231110142330_small_poll_t...

85 lines
2.4 KiB
Go

// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package migrations
import (
"context"
"github.com/uptrace/bun"
)
func init() {
up := func(ctx context.Context, db *bun.DB) error {
return db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
// Add new poll expiry column WITHOUT
// the previously set NULL constraint.
if _, err := tx.NewAddColumn().
Table("polls").
ColumnExpr("? TIMESTAMPTZ", bun.Ident("expires_at_new")).
Exec(ctx); err != nil {
return err
}
// Copy all data from old to new,
// this won't cause anyn issues as
// old column is NOT NULL and it's
// only the new column that drops
// this constraint to allow NULL.
if _, err := tx.NewUpdate().
Table("polls").
Column("expires_at_new").
Set("? = ?", bun.Ident("expires_at_new"), bun.Ident("expires_at")).
Where("TRUE"). // bun gets angry performing update over all rows
Exec(ctx); err != nil {
return err
}
// Drop the old poll expiry column.
if _, err := tx.NewDropColumn().
Table("polls").
ColumnExpr("?", bun.Ident("expires_at")).
Exec(ctx); err != nil {
return err
}
// Rename the new expiry column
// to the correct name (of the old).
if _, err := tx.NewRaw(
"ALTER TABLE ? RENAME COLUMN ? TO ?",
bun.Ident("polls"),
bun.Ident("expires_at_new"),
bun.Ident("expires_at"),
).Exec(ctx); err != nil {
return err
}
return nil
})
}
down := func(ctx context.Context, db *bun.DB) error {
return db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
return nil
})
}
if err := Migrations.Register(up, down); err != nil {
panic(err)
}
}