Merge branch 'associations_2'

activerecord/lib/active_record/associations.rb

@@ -1458,9 +1458,9 @@ module ActiveRecord
           after_destroy(method_name)
         end
 
-        def find_with_associations(options = {})
+        def find_with_associations(options = {}, join_dependency = nil)
           catch :invalid_query do
-            join_dependency = JoinDependency.new(self, merge_includes(scope(:find, :include), options[:include]), options[:joins])
+            join_dependency ||= JoinDependency.new(self, merge_includes(scope(:find, :include), options[:include]), options[:joins])
             rows = select_all_rows(options, join_dependency)
             return join_dependency.instantiate(rows)
           end

activerecord/lib/active_record/base.rb

@@ -664,11 +664,23 @@ module ActiveRecord #:nodoc:
       # This is an alias for find(:all).  You can pass in all the same arguments to this method as you can
       # to find(:all)
       def all(*args)
-        if args.empty? && !scoped?(:find)
-          arel_table
+        options = args.extract_options!
+
+        if options.empty? && !scoped?(:find)
+          relation = arel_table
         else
-          construct_finder_arel(*args)
+          relation = construct_finder_arel(options)
+          include_associations = merge_includes(scope(:find, :include), options[:include])
+
+          if include_associations.any?
+            if references_eager_loaded_tables?(options)
+              relation.eager_load(include_associations)
+            else
+              relation.preload(include_associations)
+            end
+          end
         end
+        relation
       end
 
       # Executes a custom SQL query against your database and returns all the results.  The results will
@@ -1719,7 +1731,6 @@ module ActiveRecord #:nodoc:
           relation = relation.readonly if options[:readonly]
 
           relation
-
         end
 
         def construct_finder_sql(options, scope = scope(:find))

activerecord/lib/active_record/relation.rb

@@ -6,6 +6,18 @@ module ActiveRecord
     def initialize(klass, relation)
       @klass, @relation = klass, relation
       @readonly = false
+      @associations_to_preload = []
+      @eager_load_associations = []
+    end
+
+    def preload(association)
+      @associations_to_preload += association
+      self
+    end
+
+    def eager_load(association)
+      @eager_load_associations += association
+      self
     end
 
     def readonly
@@ -14,9 +26,23 @@ module ActiveRecord
     end
 
     def to_a
-      records = @klass.find_by_sql(@relation.to_sql)
-
-      records.each { |record| record.readonly! } if @readonly
+      if @eager_load_associations.any?
+        records = catch :invalid_query do
+          @klass.send(:find_with_associations, {
+            :select => @relation.send(:select_clauses).join(', '),
+            :joins => @relation.joins(relation),
+            :group => @relation.send(:group_clauses).join(', '),
+            :order => @relation.send(:order_clauses).join(', '),
+            :conditions => @relation.send(:where_clauses).join("\n\tAND "),
+            :limit => @relation.taken
+            },
+            ActiveRecord::Associations::ClassMethods::JoinDependency.new(@klass, @eager_load_associations, nil))
+        end
+      else
+        records = @klass.find_by_sql(@relation.to_sql)
+        @klass.send(:preload_associations, records, @associations_to_preload) unless @associations_to_preload.empty?
+        records.each { |record| record.readonly! } if @readonly
+      end
 
       records
     end

activerecord/test/cases/associations/cascaded_eager_loading_test.rb

@@ -104,7 +104,7 @@ class CascadedEagerLoadingTest < ActiveRecord::TestCase
       authors.first.posts.first.special_comments.first.post.very_special_comment
     end
   end
-  
+
   def test_eager_association_loading_where_first_level_returns_nil
     authors = Author.find(:all, :include => {:post_about_thinking => :comments}, :order => 'authors.id DESC')
     assert_equal [authors(:mary), authors(:david)], authors

activerecord/test/cases/method_scoping_test.rb

@@ -593,12 +593,12 @@ class DefaultScopingTest < ActiveRecord::TestCase
   end
 
   def test_default_scope_with_conditions_string
-    assert_equal Developer.find_all_by_name('David').map(&:id).sort, DeveloperCalledDavid.all.to_a.map(&:id).sort
+    assert_equal Developer.find_all_by_name('David').map(&:id).sort, DeveloperCalledDavid.find(:all).map(&:id).sort
     assert_equal nil, DeveloperCalledDavid.create!.name
   end
 
   def test_default_scope_with_conditions_hash
-    assert_equal Developer.find_all_by_name('Jamis').map(&:id).sort, DeveloperCalledJamis.all.to_a.map(&:id).sort
+    assert_equal Developer.find_all_by_name('Jamis').map(&:id).sort, DeveloperCalledJamis.find(:all).map(&:id).sort
     assert_equal 'Jamis', DeveloperCalledJamis.create!.name
   end
 

activerecord/test/cases/relations_test.rb

@@ -1,6 +1,7 @@
 require "cases/helper"
 require 'models/post'
 require 'models/topic'
+require 'models/comment'
 require 'models/reply'
 require 'models/author'
 require 'models/entrant'
@@ -8,7 +9,7 @@ require 'models/developer'
 require 'models/company'
 
 class RelationTest < ActiveRecord::TestCase
-  fixtures :authors, :topics, :entrants, :developers, :companies, :developers_projects, :accounts, :categories, :categorizations, :posts
+  fixtures :authors, :topics, :entrants, :developers, :companies, :developers_projects, :accounts, :categories, :categorizations, :posts, :comments
 
   def test_finding_with_conditions
     assert_equal Author.find(:all, :conditions => "name = 'David'"), Author.all.conditions("name = 'David'").to_a
@@ -85,5 +86,44 @@ class RelationTest < ActiveRecord::TestCase
     Developer.all.readonly.each { |d| assert d.readonly? }
     Developer.all(:readonly => true).each { |d| assert d.readonly? }
   end
+
+  def test_eager_association_loading_of_stis_with_multiple_references
+    authors = Author.all(:include => { :posts => { :special_comments => { :post => [ :special_comments, :very_special_comment ] } } }, :order => 'comments.body, very_special_comments_posts.body', :conditions => 'posts.id = 4').to_a
+    assert_equal [authors(:david)], authors
+    assert_no_queries do
+      authors.first.posts.first.special_comments.first.post.special_comments
+      authors.first.posts.first.special_comments.first.post.very_special_comment
+    end
+  end
+
+  def test_find_with_included_associations
+    assert_queries(2) do
+      posts = Post.find(:all, :include => :comments)
+      posts.first.comments.first
+    end
+    assert_queries(2) do
+      posts = Post.all(:include => :comments).to_a
+      posts.first.comments.first
+    end
+    assert_queries(2) do
+      posts = Post.find(:all, :include => :author)
+      posts.first.author
+    end
+    assert_queries(2) do
+      posts = Post.all(:include => :author).to_a
+      posts.first.author
+    end
+  end
+
+    def test_default_scope_with_conditions_string
+    assert_equal Developer.find_all_by_name('David').map(&:id).sort, DeveloperCalledDavid.all.to_a.map(&:id).sort
+    assert_equal nil, DeveloperCalledDavid.create!.name
+  end
+
+  def test_default_scope_with_conditions_hash
+    assert_equal Developer.find_all_by_name('Jamis').map(&:id).sort, DeveloperCalledJamis.all.to_a.map(&:id).sort
+    assert_equal 'Jamis', DeveloperCalledJamis.create!.name
+  end
+
 end