Image url in JSON (RABL, Dragonfly, Ruby on Rails) -

Image url in JSON (RABL, Dragonfly, Ruby on Rails) -

i'm using rabl gem, user model has many posts

users/show.rabl

object @user attributes :id, :name kid :posts extends "posts/post" end

posts/_post.rabl

attributes :id, image: post.image.url

i want show post's image, have error: undefined local variable or method "post".

but in posts/_post.html.erb can utilize <%= post.image.url =%>

images loaded dragonfly gem.

how can image url in json format?

if child-attribute can append root node using glue.

like this:

@post attributes :id, :image_url glue @image attributes :url => :image_url end

or perhaps this:

@post attributes :id node :image_url |post| post.image.url end

ruby-on-rails-3.2 rabl dragonfly-gem