43 lines
795 B
Go
43 lines
795 B
Go
package badger
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import (
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"encoding/binary"
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"github.com/dgraph-io/badger/v4"
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)
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func (b *BadgerBackend) runMigrations() error {
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return b.Update(func(txn *badger.Txn) error {
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var version uint16
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item, err := txn.Get([]byte{dbVersionKey})
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if err == badger.ErrKeyNotFound {
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version = 0
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} else if err != nil {
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return err
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} else {
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item.Value(func(val []byte) error {
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version = binary.BigEndian.Uint16(val)
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return nil
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})
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}
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// do the migrations in increasing steps (there is no rollback)
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//
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if version < 1 {
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// ...
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}
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// b.bumpVersion(txn, 1)
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return nil
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})
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}
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func (b *BadgerBackend) bumpVersion(txn *badger.Txn, version uint16) error {
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buf := make([]byte, 2)
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binary.BigEndian.PutUint16(buf, version)
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return txn.Set([]byte{dbVersionKey}, buf)
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}
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