jbuilder

code:show.json.jbuilder

json.extract! @book, :id, :name, :price

json.publisher do

json.name @book.publisher.name

json.address @book.publisher.address

end

unless @book.high_price?

json.low_price true

end

code:output

{

"id":1,

"name":"Book 1",

"price":1000,

"name_with_id":"1 - Book 1",

"publisher":

{

"name":"GIhyo inc.",

"address":"Ichigaya"

},

"low_price":true

}