60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
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package goose
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import (
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"database/sql"
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"log"
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"sort"
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)
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// Reset rolls back all migrations
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func Reset(db *sql.DB, dir string) error {
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migrations, err := CollectMigrations(dir, minVersion, maxVersion)
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if err != nil {
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return err
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}
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statuses, err := dbMigrationsStatus(db)
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if err != nil {
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return err
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}
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sort.Sort(sort.Reverse(migrations))
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for _, migration := range migrations {
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if !statuses[migration.Version] {
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continue
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}
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if err = migration.Down(db); err != nil {
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return err
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}
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}
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return nil
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}
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func dbMigrationsStatus(db *sql.DB) (map[int64]bool, error) {
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rows, err := GetDialect().dbVersionQuery(db)
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if err != nil {
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return map[int64]bool{}, createVersionTable(db)
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}
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defer rows.Close()
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// The most recent record for each migration specifies
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// whether it has been applied or rolled back.
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result := make(map[int64]bool)
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for rows.Next() {
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var row MigrationRecord
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if err = rows.Scan(&row.VersionID, &row.IsApplied); err != nil {
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log.Fatal("error scanning rows:", err)
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}
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if _, ok := result[row.VersionID]; ok {
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continue
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}
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result[row.VersionID] = row.IsApplied
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}
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return result, nil
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}
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