M2 fails when saving a model on a table with multi-column primary key

[Pinimichu]

Steps to reproduce

1. Reference a ressource model to a database table that has a multi-column primary key
2. Create a model object in magento and try to save it:
   public function createModelEntry(\vendor\Module\Api\Data\MyModelInterface $modelData) { $modelData->save(); }

Expected result

1. Model object should be saved to the database table or an exception should be thrown that multi-column primary keys are not supported

Actual result

1. Saving the model object continues without exception but data is not saved to the table.
   Info: When violating sql constraints an exception is thrown.

[piotrekkaminski]

@antonkril can you look into it?

[palamar]

@Pinimichu
Please, provide the used version. If the problem is actual for a specific tag, please, specify it and be sure that the latest update was used.

[palamar]

According to contributor guide, tickets without response for two weeks should be closed.
Please feel free to reopen if it's needed.