inserts are starting to take shape

lib/arel/insert_manager.rb

@@ -9,5 +9,8 @@ def into table
       @head.relation = table
       self
     end
+
+    def columns; @head.columns end
+    def values; @head.values end
   end
 end

lib/arel/visitors/to_sql.rb

@@ -13,7 +13,11 @@ def accept object
 
       private
       def visit_Arel_Nodes_InsertStatement o
-        "INSERT INTO #{visit o.relation}"
+        [
+          "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?),
+        ].compact.join ' '
       end
 
       def visit_Arel_Nodes_SelectStatement o
@@ -42,6 +46,7 @@ def visit_Arel_Nodes_Equality o
       def visit_Arel_Attributes_Integer o
         "#{quote_table_name o.relation.name}.#{quote_column_name o.name}"
       end
+      alias :visit_Arel_Attributes_String :visit_Arel_Attributes_Integer
 
       def visit_Fixnum o; o end
       alias :visit_String :visit_Fixnum
@@ -61,6 +66,10 @@ def visit object
         DISPATCH[const] = method
       end
 
+      def quote value, column = nil
+        @connection.quote value, column
+      end
+
       def quote_table_name name
         @connection.quote_table_name name
       end

spec/arel/insert_manager.rb

@@ -13,9 +13,7 @@ module Arel
         manager = Arel::InsertManager.new Table.engine
         manager.into(Table.new(:users)).should == manager
       end
-    end
 
-    describe 'to_sql' do
       it 'converts to sql' do
         table   = Table.new :users
         manager = Arel::InsertManager.new Table.engine
@@ -25,5 +23,46 @@ module Arel
         }
       end
     end
+
+    describe 'columns' do
+      it "converts to sql" do
+        table   = Table.new :users
+        manager = Arel::InsertManager.new Table.engine
+        manager.into table
+        manager.columns << table[:id]
+        manager.to_sql.should be_like %{
+          INSERT INTO "users" ("users"."id")
+        }
+      end
+    end
+
+    describe "values" do
+      it "converts to sql" do
+        table   = Table.new :users
+        manager = Arel::InsertManager.new Table.engine
+        manager.into table
+
+        manager.values  << 1
+        manager.to_sql.should be_like %{
+          INSERT INTO "users" VALUES (1)
+        }
+      end
+    end
+
+    describe "combo" do
+      it "puts shit together" do
+        table   = Table.new :users
+        manager = Arel::InsertManager.new Table.engine
+        manager.into table
+
+        manager.values  << 1
+        manager.values  << "aaron"
+        manager.columns << table[:id]
+        manager.columns << table[:name]
+        manager.to_sql.should be_like %{
+          INSERT INTO "users" ("users"."id", "users"."name") VALUES (1, 'aaron')
+        }
+      end
+    end
   end
 end