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Using Flag Models in Magento 2

To save a few bits of data you don’t have to create a specialized entity each time. Magento 2, just like its predecessor Magento 1, offers a Flag model. Flag models implement a small key-value store inside the Magento database.

In Magento 1 you could use the Flag model directly. For Magento 2, we have to create a class that extends the framework Flag class so we are able to set the correct FlagCode.