Module: TypeBalancer::Rails::CollectionMethods

Defined in:
lib/type_balancer/rails/collection_methods.rb

Overview

Provides collection methods for balancing by type These methods are extended onto ActiveRecord::Relation

Instance Method Summary collapse

Instance Method Details

#balance_by_type(options = {}) ⇒ Object 



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# File 'lib/type_balancer/rails/collection_methods.rb', line 11

def balance_by_type(options = {})
  type_field, offset, per_page = pagination_params(options)
  cache_key = build_cache_key(type_field)
  expires_in = options[:expires_in] || ::TypeBalancer::Rails.cache_expiry_seconds
  cache_reset = options[:cache_reset]
  if cache_reset
    ids = compute_ids(type_field)
    TypeBalancer::Rails.cache_adapter.write(cache_key, ids, expires_in: expires_in)
  else
    ids = TypeBalancer::Rails.cache_adapter.fetch(cache_key, expires_in: expires_in) do
      compute_ids(type_field)
    end
  end
  page_ids = ids[offset, per_page] || []
  return empty_relation if page_ids.empty?

  order_by_ids(page_ids)
end