Lavavel/Eloquent 5 transactions rolling back not backing save - php

Question

I do seem to be having problems getting database transactions to work on a model. I've referred to related posts on SO, but no luck yet.
In my example, I create a new record in the DB. I should be able to rollback and the new record should have disappeared shouldn't it?
try{
DB::beginTransaction();
$oNewMap = $oMap->replicate();
$oNewMap->name = "[test] " . $oNewMap->name;
$oNewMap->save(); // works
DB::rollBack(); / /record still in db
}
catch(\Exception $e){
DB::rollBack();
/* Transaction failed. */
}
When the rollback occured, why wouldn't the saved record disappear from the DB? Am I missing something with how models work with transactions?
The physical tables are all InnoDB, btw.
[EDITTED: to simplify the problem to a simple save and rollback, not doing two saves where the second save violates an FK constraint.]

Answer 1

If the model doesn't use the default database connection, you have to specify it on the transaction:
DB::connection('name')->beginTransaction();
DB::connection('name')->commit();
DB::connection('name')->rollBack();

Answer 2

Seeing your question, i remember a long time ago, where I had the same problem.
In the end i found out, that the function is called rollBack and not rollback - Note the capitalized B

Answer 3

Check your transaction level and conform that you are working with single beginTransaction() so, might you will find solution perfectly.
DB::beginTransaction()
DB::beginTransaction()
DB::transactionLevel() // will return 2
DB::commit() // doesn't commit
DB::transactionLevel() // will return 1
DB::commit() // finally, it commits to the database
DB::transactionLevel() // will return 0