Rails - Feb 2014 - is nested json structure supported for activerecord - postgresql?

Hi all,

I'm using rails 4.1.0.beta 1 and postgresql 9.3.1 and its native support 
for json column. so no special serializer or no special storage thing with 
active record, just plain :json type in active record migration.

in my active record model, I've got two json fields.

input: {"first_name"=>"firstName",
"last_name"=>"lastName",
"postcode"=>"postcode"}
output:
{"customer_detail"=>{"first_name"=>"firstName",
"last_name"=>"lastName",
"postcode"=>"postcode"}}

model.input
=> {"first_name"=>"firstName",
"last_name"=>"lastName",
"postcode"=>"postcode"}

model[:input]
=> {"first_name"=>"firstName",
"last_name"=>"lastName",
"postcode"=>"postcode"}

model.input_before_type_cast
=> "{\"first_name\":\"firstName\",
\"last_name\":\"lastName\",
\"postcode\":\"postcode\"}"

model.output 
=> nil

model[:output]
=>
{"customer_detail"=>{"first_name"=>"firstName",
"last_name"=>"lastName",
"postcode"=>"postcode"}}

model.output_before_type_cast
=>
"{\"customer_detail\":{\"first_name\":\"firstName\",\"last_name\":\"lastName\",\"postcode\":\"postcode\"}}"

could someone explain why this is happening? I'm confused why this is 
happening...

thanks!
J

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