Automatically remove database fields in Magento

If we were to remove some entries from the db_schema.xml file, Magento will not automatically remove them. This is because Magento errs on the side of backwards-compatibility in order to support older upgrade scripts that were used before declarative schema was introduced.

To have these columns or indexes automatically removed whenever setup:upgrade is executed, all you need to do is generate a whitelist.

This can be done from the command line. After opening up terminal, let’s run bin/magento setup:db-declaration:generate-whitelist

After running this line, we’ll notice a new `db...