DataMapper create-/query-by-hash equivalence

dm.rb

customer = {
  :name   => 'Dan Kubb',
  :orders => [
    {
      :reference   => 'TEST1234',
      :order_lines => [
        {
          :item => {
            :sku        => 'BLUEWIDGET1',
            :unit_price => 1.00,
          },
        },
      ],
    },
  ]
}

# Create the Customer with the nested options hash
Customer.create(customer)
# => [#<Customer @id=1 @name="Dan Kubb">]

# The same options to create can also be used to query for the same object
p Customer.all(customer)
# => [#<Customer @id=1 @name="Dan Kubb">]

dm2.rb

1 Customer.all(Customer.orders.order_lines.item.sku.like => "%BLUE%")
2 # => [#<Customer @id=1 @name="Dan Kubb">]