I managed to add a custom tab / grid to a new and editable product page with an internal input field. After this tutorial
The problem is that it does not save data. And at this moment I have no idea whether this is really not described in the textbook, or I made a mistake.
Is this enough to save data entry?
$customFieldValue = $this->_getRequest()->getPost('custom_field'); $product->save();
How can I debug this value in the backend?
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