I do not understand the meaning of the word "atomic". For example:
$conn = $this->ArticlesTable->connection();
$articles->save($entity, ['atomic' => false]); // <-- here
$conn->commit();
Should it not be be "autocommit" instead?
You're actually turning on/off "atomic" transactions, not "automatic" transactions.
"Atomic" is the correct term:
An atomic transaction is an indivisible and irreducible series of database operations such that either all occur, or nothing occurs. A guarantee of atomicity prevents updates to the database occurring only partially, which can cause greater problems than rejecting the whole series outright.
The key there is "...such that either ALL occur, or NOTHING occurs."
When atomic is false (off), and you run a save that requires more than one query, it will run each individually and could be successful on some, but not others.
When atomic is true (on), and you run a save that requires more than one query, it will process them as a single transaction, and either complete all successfully or fail all completely. No partial saves/updates.
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