diff options
Diffstat (limited to 'activerecord/lib/active_record/associations/preloader.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations/preloader.rb | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/activerecord/lib/active_record/associations/preloader.rb b/activerecord/lib/active_record/associations/preloader.rb index fafed94ff2..ce5bf15f10 100644 --- a/activerecord/lib/active_record/associations/preloader.rb +++ b/activerecord/lib/active_record/associations/preloader.rb @@ -12,7 +12,7 @@ module ActiveRecord # and all of its books via a single query: # # SELECT * FROM authors - # LEFT OUTER JOIN books ON authors.id = books.id + # LEFT OUTER JOIN books ON authors.id = books.author_id # WHERE authors.name = 'Ken Akamatsu' # # However, this could result in many rows that contain redundant data. After @@ -42,7 +42,7 @@ module ActiveRecord autoload :HasAndBelongsToMany, 'active_record/associations/preloader/has_and_belongs_to_many' autoload :BelongsTo, 'active_record/associations/preloader/belongs_to' - attr_reader :records, :associations, :options, :model + attr_reader :records, :associations, :preload_scope, :model # Eager loads the named associations for the given Active Record record(s). # @@ -78,15 +78,10 @@ module ActiveRecord # [ :books, :author ] # { :author => :avatar } # [ :books, { :author => :avatar } ] - # - # +options+ contains options that will be passed to ActiveRecord::Base#find - # (which is called under the hood for preloading records). But it is passed - # only one level deep in the +associations+ argument, i.e. it's not passed - # to the child associations when +associations+ is a Hash. - def initialize(records, associations, options = {}) - @records = Array.wrap(records).compact.uniq - @associations = Array.wrap(associations) - @options = options + def initialize(records, associations, preload_scope = nil) + @records = Array.wrap(records).compact.uniq + @associations = Array.wrap(associations) + @preload_scope = preload_scope || Relation.new(nil, nil) end def run @@ -110,7 +105,7 @@ module ActiveRecord def preload_hash(association) association.each do |parent, child| - Preloader.new(records, parent, options).run + Preloader.new(records, parent, preload_scope).run Preloader.new(records.map { |record| record.send(parent) }.flatten, child).run end end @@ -125,7 +120,7 @@ module ActiveRecord def preload_one(association) grouped_records(association).each do |reflection, klasses| klasses.each do |klass, records| - preloader_for(reflection).new(klass, records, reflection, options).run + preloader_for(reflection).new(klass, records, reflection, preload_scope).run end end end |