Move Virtual Rule attribute to extension_attributes

[romainruaud]

Hello @afoucret

I am currently wondering about migrating the former "virtual_rule" attributes of the categories to an extension_attribute.

The pros :

• prevent the backend model of the attribute from being saved in DB : this allow to properly de-activating elasticsuite without having to clean the database manually.

• imho this is more consistent to the Magento's philosophy : complex objects added to entities is more likely to be done via extension_attributes.

The cons :

• this would require to store the rules elsewhere than the category eav attribute table : so a migration script (via the Setup of newest version ?) would be mandatory in case of version upgrade

Your opinion ?

[afoucret]

PR #863 have been merged.
Will be part of release 2.6.0