How to transfer attributes in Ruby hash "up" one level

Question

x = {:name => "John", :data => {:physical => {:age => 25, :weight => 150}}}

I want to move the data sub-attributes one level (but it’s not necessary to just smooth out all the attributes). In this case, I essentially want to move: the physical attribute "up" one level.

I'm trying to do it

y = x[:data']
y.each{ |key| x[key] = y[key] }

but i get ...

x = x.except(:data)
 => {:name=>"John", [:physical, {:age=>25, :weight=>150}]=>nil} 

I'm looking for...

 => {:name=>"John", :physical => {:age=>25, :weight=>150}} 

Answer 1

Try the following:

x = x.merge(x.delete(:data))

Answer 2

I would go like this:

x = {:name => "John", :data => {:physical => {:age => 25, :weight => 150}}}

x[:physical] = x.delete(:data)[:physical]

pp x #=> {:name=>"John", :physical=>{:age=>25, :weight=>150}}