# Newbie problem with Insert, Delete, Iterate

**URL:** <https://discuss.dgraph.io/t/newbie-problem-with-insert-delete-iterate/19214>\
**Category:** Badger\
**Created:** [March 5, 2024, 5:45am UTC](https://discuss.dgraph.io/t/newbie-problem-with-insert-delete-iterate/19214 "2024-03-05T05:45:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jiminy](https://avatars.discourse-cdn.com/v4/letter/j/5fc32e/32.png) [@jiminy](https://discuss.dgraph.io/u/jiminy)\
**Post date:** [March 5, 2024, 5:45am UTC](https://discuss.dgraph.io/t/newbie-problem-with-insert-delete-iterate/19214/1 "2024-03-05T05:45:33Z")

</div>

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!

---

<div class="post-metadata">

**Author:** ![jiminy](https://avatars.discourse-cdn.com/v4/letter/j/5fc32e/32.png) [@jiminy](https://discuss.dgraph.io/u/jiminy)\
**Post date:** [March 5, 2024, 6:59am UTC](https://discuss.dgraph.io/t/newbie-problem-with-insert-delete-iterate/19214/2 "2024-03-05T06:59:35Z")

</div>

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