Is it possible to define a subset of fields to be selected from a resource in a read action?
Ash.Query has a select function, so that is possible when using that directly or passing a existing read action with Ash.Query.for_read, but what if I want to keep that abstracted away in a read action?
Here is my use case:
Let’s say I have an User resource that has a bunch of attributes and relationships. I want to load the logged user from that resource, but I don’t want to store the full resource (and relationship full resources as-well) in memory if I just need a couple of its fields to use for authorization.
In that case, I want to have a read action for each resource I want to load that will return just a subset of the attributes loaded and leave the rest as nil.
I can probably do that with custom actions, but it would be nice to have it in a read action for simplicity.
Also, I know that an reasonable solution would be to have another resource for the same table with just the fields I need (ex. AuthenticatedUser). The issue is that I also need to select a subset of attributes from other relationships that need to be loaded with the User resource, meaning that I would need to create a new resource for each one of them.
