41 lines
1.5 KiB
Go
41 lines
1.5 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package migrations
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import (
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"context"
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"github.com/uptrace/bun"
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"github.com/uptrace/bun/dialect"
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)
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// doesColumnExist safely checks whether given column exists on table, handling both SQLite and PostgreSQL appropriately.
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func doesColumnExist(ctx context.Context, tx bun.Tx, table, col string) (bool, error) {
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var n int
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var err error
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switch tx.Dialect().Name() {
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case dialect.SQLite:
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err = tx.NewRaw("SELECT COUNT(*) FROM pragma_table_info(?) WHERE name=?", table, col).Scan(ctx, &n)
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case dialect.PG:
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err = tx.NewRaw("SELECT COUNT(*) FROM information_schema.columns WHERE table_name=? and column_name=?", table, col).Scan(ctx, &n)
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default:
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panic("unexpected dialect")
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}
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return (n > 0), err
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}
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