Module: Plutonium::Resource::Controllers::EagerLoading

Extended by:

ActiveSupport::Concern

Included in:

Plutonium::Resource::Controller, ExportCsv, KanbanActions

Defined in:

lib/plutonium/resource/controllers/eager_loading.rb

Overview

Preloads the associations and attachments a collection is about to render, without being told which.

Plutonium can do this where a general-purpose Rails app cannot. The rendered field set is DECLARED — resolved from the policy — rather than discovered by running a template, and resolving it never touches the collection. So the exact set of associations a page will read is known before the query is built. There is no includes list to write, and none to keep in step with the definition as fields come and go.

Every collection rendering passes its OWN field set, because they differ: the index renders presentable_attributes, the CSV export renders permitted_attributes_for_export, and a kanban card renders its card_fields (falling back to the grid fields). Reading one action's fields from another's code path resolves the wrong policy method.