stop caching the class on the statement cache object

activerecord/lib/active_record/core.rb

@@ -139,7 +139,7 @@ module ActiveRecord
             where(key => params[key]).limit(1)
           }
         }
-        record = s.execute(key => id).first
+        record = s.execute({key => id}, self, connection).first
         unless record
           raise RecordNotFound, "Couldn't find #{name} with '#{primary_key}'=#{id}"
         end
@@ -167,7 +167,7 @@ module ActiveRecord
           }
         }
         begin
-          s.execute(hash).first
+          s.execute(hash, self, connection).first
         rescue TypeError => e
           raise ActiveRecord::StatementInvalid.new(e.message, e)
         end

activerecord/lib/active_record/statement_cache.rb

@@ -74,19 +74,19 @@ module ActiveRecord
       end
     end
 
-    attr_reader :bind_map, :query_builder, :klass
+    attr_reader :bind_map, :query_builder
 
     def initialize(block = Proc.new)
       relation       = block.call Params.new
       @bind_map      = BindMap.new relation.bind_values
-      @klass         = relation.klass
-      @query_builder = make_query_builder @klass.connection, relation.arel
+      klass         = relation.klass
+      @query_builder = make_query_builder klass.connection, relation.arel
     end
 
-    def execute(params)
+    def execute(params, klass, connection)
       bind_values = bind_map.bind params
 
-      sql = query_builder.sql_for bind_values, klass.connection
+      sql = query_builder.sql_for bind_values, connection
 
       klass.find_by_sql sql, bind_values
     end

activerecord/test/cases/statement_cache_test.rb

@@ -19,9 +19,9 @@ module ActiveRecord
         Book.where(:name => params[:name])
       end
 
-      b = cache.execute name: "my book"
+      b = cache.execute({ name: "my book" }, Book, Book.connection)
       assert_equal "my book", b[0].name
-      b = cache.execute name: "my other book"
+      b = cache.execute({ name: "my other book" }, Book, Book.connection)
       assert_equal "my other book", b[0].name
     end
 
@@ -34,9 +34,9 @@ module ActiveRecord
         Book.where(id: params[:id])
       end
 
-      b = cache.execute id: b1.id
+      b = cache.execute({ id: b1.id }, Book, Book.connection)
       assert_equal b1.name, b[0].name
-      b = cache.execute id: b2.id
+      b = cache.execute({ id: b2.id }, Book, Book.connection)
       assert_equal b2.name, b[0].name
     end
 
@@ -59,7 +59,7 @@ module ActiveRecord
 
       Book.create(name: "my book", author_id: 4)
 
-      books = cache.execute({})
+      books = cache.execute({}, Book, Book.connection)
       assert_equal "my book", books[0].name
     end
 
@@ -72,7 +72,7 @@ module ActiveRecord
       molecule = salty.molecules.create(name: 'dioxane')
       molecule.electrons.create(name: 'lepton')
 
-      liquids = cache.execute({})
+      liquids = cache.execute({}, Book, Book.connection)
       assert_equal "salty", liquids[0].name
     end
 
@@ -85,13 +85,13 @@ module ActiveRecord
         Book.create(name: "my book")
       end
 
-      first_books = cache.execute({})
+      first_books = cache.execute({}, Book, Book.connection)
 
       3.times do
         Book.create(name: "my book")
       end
 
-      additional_books = cache.execute({})
+      additional_books = cache.execute({}, Book, Book.connection)
       assert first_books != additional_books
     end
   end