Newbie problem with Insert, Delete, Iterate

Users Badger
1

I have some very simple code that’s not doing what I expect. Probably a newbie mistake.

Here’s the pseudo-code version:

h.DB, err := badger.Open(opts)

err = h.DB.Update(func(txn *badger.Txn) error {
	e := badger.NewEntry("x:1", "1")
	_ = txn.SetEntry(e)
	e = badger.NewEntry("x:2", "2")
	_ = txn.SetEntry(e)
    } // All good

    // Let's check
err = h.DB.View(func(txn *badger.Txn) error {
	v, err := txn.Get("x:1")
	assert(v == "1") // Success!
	v, err = txn.Get("x:2")
	assert(v == "2") // Success!
	return err
})

err := h.DB.Update(func(txn *badger.Txn) error {
	return txn.Delete("x:1")
})
    assert(err == nil) // All good!

// Lookup of "x:1" should fail
err = h.DB.View(func(txn *badger.Txn) error {
	_, err := txn.Get(key)
            assert(err == "Key not found") // As expected!
	return err
})

// Now, iterate over the key prefix
err := h.DB.View(func(txn *badger.Txn) error {
	iter := txn.NewIterator(badger.DefaultIteratorOptions)
	defer iter.Close()
	prefix := "x:"
	for iter.Seek(prefix); iter.ValidForPrefix(prefix); iter.Next() {
		item := iter.Item()
		if !item.IsDeletedOrExpired() {
			fmt.Printf(item.Key) // prints "x:1" ... WTF?
		}
	}

If need be I can turn this into working code (or non-working code, so to speak) to demonstrate the problem but I’m hoping someone can just tell me what I’m doing wrong here!

2

Sorry, problem solved, was nothing to do with Badger.