[Feature] Add has-one-through relationship

cloudcreativity / laravel-json-api

JSON API (jsonapi.org) package for Laravel applications.

http://laravel-json-api.readthedocs.io/en/latest/

Apache License 2.0

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[Feature] Add has-one-through relationship #429

Closed lindyhopchris closed 5 years ago

lindyhopchris commented 5 years ago

Adds a has-one-through relationship to match the equivalent relationship added to Eloquent in Laravel 5.8.

Like the has-many-through relationship, this relationship is read-only as the relationship is effectively created/modified via the intermediary resource.

Closes #415