Don't interpret decimals as table names in ActiveRecord::Associations::ClassMethods#references_eager_loaded_tables? [#532 state:resolved]

Signed-off-by: Pratik Naik <pratiknaik@gmail.com>

activerecord/lib/active_record/associations.rb

@@ -1679,19 +1679,19 @@ module ActiveRecord
               else            all << cond
             end
           end
-          conditions.join(' ').scan(/([\.\w]+).?\./).flatten
+          conditions.join(' ').scan(/([\.a-zA-Z_]+).?\./).flatten
         end
 
         def order_tables(options)
           order = [options[:order], scope(:find, :order) ].join(", ")
           return [] unless order && order.is_a?(String)
-          order.scan(/([\.\w]+).?\./).flatten
+          order.scan(/([\.a-zA-Z_]+).?\./).flatten
         end
 
         def selects_tables(options)
           select = options[:select]
           return [] unless select && select.is_a?(String)
-          select.scan(/"?([\.\w]+)"?.?\./).flatten
+          select.scan(/"?([\.a-zA-Z_]+)"?.?\./).flatten
         end
 
         # Checks if the conditions reference a table other than the current model table

activerecord/test/cases/associations/eager_test.rb

@@ -559,6 +559,13 @@ class EagerAssociationTest < ActiveRecord::TestCase
     assert_nothing_raised { Post.find(:all, :include => 'comments') }
   end
 
+  def test_eager_with_floating_point_numbers
+    assert_queries(2) do
+      # Before changes, the floating point numbers will be interpreted as table names and will cause this to run in one query
+      Comment.find :all, :conditions => "123.456 = 123.456", :include => :post
+    end
+  end
+
   def test_preconfigured_includes_with_belongs_to
     author = posts(:welcome).author_with_posts
     assert_no_queries {assert_equal 5, author.posts.size}