inserts have the correct syntax

lib/arel/select_manager.rb

@@ -30,7 +30,7 @@ module Arel
     def insert values
       im = InsertManager.new @engine
       im.insert values
-      raise
+      @engine.connection.execute im.to_sql
     end
   end
 end

lib/arel/visitors/to_sql.rb

@@ -15,8 +15,15 @@ module Arel
       def visit_Arel_Nodes_InsertStatement o
         [
           "INSERT INTO #{visit o.relation}",
-          ("(#{o.columns.map { |x| visit x }.join ', '})" unless o.columns.empty?),
-          ("VALUES (#{o.values.map { |x| quote visit x }.join ', '})" unless o.values.empty?),
+
+          ("(#{o.columns.map { |x|
+                quote_column_name x.name
+            }.join ', '})" unless o.columns.empty?),
+
+          ("VALUES (#{o.values.map { |value|
+            value ? quote(visit(value)) : 'NULL'
+          }.join ', '})" unless o.values.empty?),
+
         ].compact.join ' '
       end
 
@@ -43,12 +50,15 @@ module Arel
         "#{visit o.left} = #{visit o.right}"
       end
 
-      def visit_Arel_Attributes_Integer o
+      def visit_Arel_Attributes_Attribute o
         "#{quote_table_name o.relation.name}.#{quote_column_name o.name}"
       end
-      alias :visit_Arel_Attributes_String :visit_Arel_Attributes_Integer
+      alias :visit_Arel_Attributes_Integer :visit_Arel_Attributes_Attribute
+      alias :visit_Arel_Attributes_String :visit_Arel_Attributes_Attribute
+      alias :visit_Arel_Attributes_Time :visit_Arel_Attributes_Attribute
 
       def visit_Fixnum o; o end
+      alias :visit_Time :visit_Fixnum
       alias :visit_String :visit_Fixnum
       alias :visit_Arel_Nodes_SqlLiteral :visit_Fixnum
       alias :visit_Arel_SqlLiteral :visit_Fixnum # This is deprecated

spec/arel/insert_manager_spec.rb

@@ -9,13 +9,33 @@ module Arel
     end
 
     describe 'insert' do
+      it "inserts null" do
+        table = Table.new(:users)
+        manager = Arel::InsertManager.new Table.engine
+        manager.insert [[table[:id], nil]]
+        manager.to_sql.should be_like %{
+          INSERT INTO "users" ("id") VALUES (NULL)
+        }
+      end
+
+      it "inserts time" do
+        table = Table.new(:users)
+        manager = Arel::InsertManager.new Table.engine
+
+        time = Time.now
+        manager.insert [[table[:id], time]]
+        manager.to_sql.should be_like %{
+          INSERT INTO "users" ("id") VALUES (#{Table.engine.connection.quote time})
+        }
+      end
+
       it 'takes a list of lists' do
         table = Table.new(:users)
         manager = Arel::InsertManager.new Table.engine
         manager.into table
         manager.insert [[table[:id], 1], [table[:name], 'aaron']]
         manager.to_sql.should be_like %{
-          INSERT INTO "users" ("users"."id", "users"."name") VALUES (1, 'aaron')
+          INSERT INTO "users" ("id", "name") VALUES (1, 'aaron')
         }
       end
 
@@ -24,7 +44,7 @@ module Arel
         manager = Arel::InsertManager.new Table.engine
         manager.insert [[table[:id], 1], [table[:name], 'aaron']]
         manager.to_sql.should be_like %{
-          INSERT INTO "users" ("users"."id", "users"."name") VALUES (1, 'aaron')
+          INSERT INTO "users" ("id", "name") VALUES (1, 'aaron')
         }
       end
 
@@ -57,7 +77,7 @@ module Arel
         manager.into table
         manager.columns << table[:id]
         manager.to_sql.should be_like %{
-          INSERT INTO "users" ("users"."id")
+          INSERT INTO "users" ("id")
         }
       end
     end
@@ -86,7 +106,7 @@ module Arel
         manager.columns << table[:id]
         manager.columns << table[:name]
         manager.to_sql.should be_like %{
-          INSERT INTO "users" ("users"."id", "users"."name") VALUES (1, 'aaron')
+          INSERT INTO "users" ("id", "name") VALUES (1, 'aaron')
         }
       end
     end

spec/arel/visitors/to_sql_spec.rb

@@ -0,0 +1,17 @@
+require 'spec_helper'
+
+module Arel
+  module Visitors
+    describe 'the to_sql visitor' do
+      before do
+        @visitor = ToSql.new Table.engine
+        @attr = Table.new(:users)[:id]
+      end
+
+      it "should visit visit_Arel_Attributes_Time" do
+        attr = Attributes::Time.new(@attr.relation, @attr.name, @attr.column)
+        @visitor.accept attr
+      end
+    end
+  end
+end