psql postgres -c "create database circular_fkeys_left"
psql circular_fkeys_left <<EOS
  create table foos(id integer primary key, bar_id integer);
  create table bars(id integer primary key, foo_id integer);
  insert into foos(id, bar_id) values(1, 5);
  insert into bars(id, foo_id) values(5, 1);
  alter table foos add constraint bar_fk foreign key(bar_id) references bars;
  alter table bars add constraint foo_fk foreign key(foo_id) references foos;
EOS

psql postgres -c "create database circular_fkeys_right"
psql circular_fkeys_right <<EOS
  create table foos(id integer primary key, bar_id integer);
  create table bars(id integer primary key, foo_id integer);
  alter table foos add constraint bar_fk foreign key(bar_id) references bars;
  alter table bars add constraint foo_fk foreign key(foo_id) references foos;
EOS

cat >circular_fkeys <<EOF
RR::Initializer::run do |config|
  config.left = {
    :adapter  => 'postgresql', # or 'mysql'
    :database => 'circular_fkeys_left',
    :username => 'postgres',
    :password => 'tiger',
    :host     => '127.0.0.1'
  }

  config.right = {
    :adapter  => 'postgresql',
    :database => 'circular_fkeys_right',
    :username => 'postgres',
    :password => 'tiger',
    :host     => '127.0.0.1'
  }

  config.include_tables /./
  config.add_table_options 'foos',
    :before_table_sync => "alter table foos disable trigger all; alter table bars disable trigger all"
  config.add_table_options 'bars',
    :after_table_sync => "alter table foos enable trigger all; alter table bars enable trigger all"
end
EOF
rubyrep scan -c circular_fkeys
rubyrep sync -c circular_fkeys
rubyrep scan -c circular_fkeys

psql postgres -c "drop database circular_fkeys_left"
psql postgres -c "drop database circular_fkeys_right"