Fixed AssociationsPreload such that it doesnt require foreign keys to…

… be integers (fcheung) [#33 state:resolved]

activerecord/lib/active_record/association_preload.rb

@@ -59,14 +59,14 @@ def add_preloaded_record_to_collection(parent_records, reflection_name, associat
 
       def set_association_collection_records(id_to_record_map, reflection_name, associated_records, key)
         associated_records.each do |associated_record|
-          mapped_records = id_to_record_map[associated_record[key].to_i]
+          mapped_records = id_to_record_map[associated_record[key].to_s]
           add_preloaded_records_to_collection(mapped_records, reflection_name, associated_record)
         end
       end
 
       def set_association_single_records(id_to_record_map, reflection_name, associated_records, key)
         associated_records.each do |associated_record|
-          mapped_records = id_to_record_map[associated_record[key].to_i]
+          mapped_records = id_to_record_map[associated_record[key].to_s]
           mapped_records.each do |mapped_record|
             mapped_record.send("set_#{reflection_name}_target", associated_record)
           end
@@ -78,7 +78,7 @@ def construct_id_map(records)
         ids = []
         records.each do |record|
           ids << record.id
-          mapped_records = (id_to_record_map[record.id] ||= [])
+          mapped_records = (id_to_record_map[record.id.to_s] ||= [])
           mapped_records << record
         end
         ids.uniq!
@@ -115,7 +115,7 @@ def preload_has_one_association(records, reflection, preload_options={})
             source = reflection.source_reflection.name
             through_records.first.class.preload_associations(through_records, source)
             through_records.each do |through_record|
-              add_preloaded_record_to_collection(id_to_record_map[through_record[through_primary_key].to_i],
+              add_preloaded_record_to_collection(id_to_record_map[through_record[through_primary_key].to_s],
                                                  reflection.name, through_record.send(source))
             end
           end
@@ -140,7 +140,7 @@ def preload_has_many_association(records, reflection, preload_options={})
             source = reflection.source_reflection.name
             through_records.first.class.preload_associations(through_records, source)
             through_records.each do |through_record|
-              add_preloaded_records_to_collection(id_to_record_map[through_record[through_primary_key].to_i],
+              add_preloaded_records_to_collection(id_to_record_map[through_record[through_primary_key].to_s],
                                                  reflection.name, through_record.send(source))
             end
           end
@@ -195,18 +195,22 @@ def preload_belongs_to_association(records, reflection, preload_options={})
           records.each do |record|
             if klass = record.send(polymorph_type)
               klass_id = record.send(primary_key_name)
-
-              id_map = klasses_and_ids[klass] ||= {}
-              id_list_for_klass_id = (id_map[klass_id] ||= [])
-              id_list_for_klass_id << record
+              if klass_id
+                id_map = klasses_and_ids[klass] ||= {}
+                id_list_for_klass_id = (id_map[klass_id.to_s] ||= [])
+                id_list_for_klass_id << record
+              end
             end
           end
           klasses_and_ids = klasses_and_ids.to_a
         else
           id_map = {}
           records.each do |record|
-            mapped_records = (id_map[record.send(primary_key_name)] ||= [])
-            mapped_records << record
+            key = record.send(primary_key_name)
+            if key
+              mapped_records = (id_map[key.to_s] ||= [])
+              mapped_records << record
+            end
           end
           klasses_and_ids = [[reflection.klass.name, id_map]]
         end

activerecord/test/cases/associations/eager_test.rb

@@ -11,11 +11,14 @@
 require 'models/pet'
 require 'models/reference'
 require 'models/job'
+require 'models/subscriber'
+require 'models/subscription'
+require 'models/book'
 
 class EagerAssociationTest < ActiveRecord::TestCase
   fixtures :posts, :comments, :authors, :categories, :categories_posts,
             :companies, :accounts, :tags, :taggings, :people, :readers,
-            :owners, :pets, :author_favorites, :jobs, :references
+            :owners, :pets, :author_favorites, :jobs, :references, :subscribers, :subscriptions, :books
 
   def test_loading_with_one_association
     posts = Post.find(:all, :include => :comments)
@@ -220,6 +223,24 @@ def test_eager_load_has_many_through_quotes_table_and_column_names
     assert_no_queries{ assert_equal jobs(:unicyclist, :magician), michael.jobs.sort_by(&:id) }
   end
 
+  def test_eager_load_has_many_with_string_keys
+    subscriptions = subscriptions(:webster_awdr, :webster_rfr)
+    subscriber =Subscriber.find(subscribers(:second).id, :include => :subscriptions)
+    assert_equal subscriptions, subscriber.subscriptions.sort_by(&:id)
+  end
+
+  def test_eager_load_has_many_through_with_string_keys
+    books = books(:awdr, :rfr)
+    subscriber = Subscriber.find(subscribers(:second).id, :include => :books)
+    assert_equal books, subscriber.books.sort_by(&:id)
+  end
+
+  def test_eager_load_belongs_to_with_string_keys
+    subscriber = subscribers(:second)
+    subscription = Subscription.find(subscriptions(:webster_awdr).id, :include => :subscriber)
+    assert_equal subscriber, subscription.subscriber
+  end
+
   def test_eager_association_loading_with_explicit_join
     posts = Post.find(:all, :include => :comments, :joins => "INNER JOIN authors ON posts.author_id = authors.id AND authors.name = 'Mary'", :limit => 1, :order => 'author_id')
     assert_equal 1, posts.length

activerecord/test/models/subscriber.rb

@@ -1,5 +1,7 @@
 class Subscriber < ActiveRecord::Base
   set_primary_key 'nick'
+  has_many :subscriptions
+  has_many :books, :through => :subscriptions
 end
 
 class SpecialSubscriber < Subscriber

activerecord/test/schema/schema.rb

@@ -349,6 +349,11 @@ def create_table(*args, &block)
   end
   add_index :subscribers, :nick, :unique => true
 
+  create_table :subscriptions, :force => true do |t|
+    t.string :subscriber_id
+    t.integer :book_id
+  end
+
   create_table :tasks, :force => true do |t|
     t.datetime :starting
     t.datetime :ending