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The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
An example of a good use of a polymorphic relationship can be seen in the Rails Active Storage module, which allows you to attach files to a model, and instead of duplicating the database columns and tables for each model that has attachments, there are two general tables: activestorage_attachments (attachments; relationship info) and activestorage_blobs (blobs; file info). A model can have one or many attachments (has_one_attachment and has_many_attachments, both can be used more than once depending on your needs), an attachment belongs to a record (record_id and record_type) and belongs to a blob (blob_id), and blobs have one attachment. You can access an attachment attribute on the related model like so, user.avatar # has_one_attachment(:avatar); or for many attachments of the same type, user.photos # an array of attachments; has_many_attachments(:photos). There’s a Laravel package similar to this called spatie/laravel-medialibrary.