Class: InstantRecord::BootstrapsController

Inherits:
ActionController::API
  • Object
show all
Defined in:
app/controllers/instant_record/bootstraps_controller.rb

Overview

First-sync hydration: current state (windowed per model when a sync_window is declared) plus the change-log cursor, so a fresh client never replays the whole change log. The cursor is read BEFORE the rows, inside one transaction: events committed between cursor and response re-apply idempotently client-side, whereas the reverse order would skip them.

Instance Method Summary collapse

Instance Method Details

#show ⇒ Object 



10
11
12
13
14
15
16
 
# File 'app/controllers/instant_record/bootstraps_controller.rb', line 10

def show
  payload = ActiveRecord::Base.transaction do
    cursor = Change.maximum(:id) || 0
    { cursor: cursor, records: bootstrap_models.flat_map { |model| serialize_rows(model) } }
  end
  render json: payload
end