Merge branch 'master' of git://github.com/rails/rails

1 files changed, 5 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/schema_dumper.rb b/activerecord/lib/active_record/schema_dumper.rb
index 2d90ef35aa..5d88012e4f 100644
--- a/activerecord/lib/active_record/schema_dumper.rb
+++ b/activerecord/lib/active_record/schema_dumper.rb
@@ -78,11 +78,14 @@ HEADER
         begin
           tbl = StringIO.new
 
+          # first dump primary key column
           if @connection.respond_to?(:pk_and_sequence_for)
             pk, pk_seq = @connection.pk_and_sequence_for(table)
+          elsif @connection.respond_to?(:primary_key)
+            pk = @connection.primary_key(table)
           end
           pk ||= 'id'
-
+          
           tbl.print "  create_table #{table.inspect}"
           if columns.detect { |c| c.name == pk }
             if pk != 'id'
@@ -94,6 +97,7 @@ HEADER
           tbl.print ", :force => true"
           tbl.puts " do |t|"
 
+          # then dump all non-primary key columns
           column_specs = columns.map do |column|
             raise StandardError, "Unknown type '#{column.sql_type}' for column '#{column.name}'" if @types[column.type].nil?
             next if column.name == pk