Draper-decorated object loses decoration in json_builder

[nzifnab]

Not sure where the culprit is but I'm going to post this here and hope we can figure out what the issue is :)

I'm using json_builder in a rails project. Simple enough.

My controller:

class ProductsController < ApplicationController
  def index
    @products = current_user.products.decorate

    respond_to do |format|
      format.json
    end
  end
end

And my index view:

array(@products) do |product|
  product_id product.id
  quantity 1
  tax product.tax
  unit_cost product.unit_cost
  name product.name
  description product.description
end

Yes, this example is very basic. I'm just trying to display the issue. I'm using the draper gem to decorate my products collection: https://github.com/drapergem/draper

@products is correctly a ProductDecorator. So is @products[0]. However, in that view inside the block product is just a Product and is no longer decorated. Any idea why that might be?

[dewski]

Not really sure what may be the issue here as I am not familiar with draper. Could you check to see what type @products is? Does draper wrap the collection with a single ProductDecorator object or is each element a ProductDecorator object?

When array is called, internally json_builder just calls .each on it and passes in each element to the block, see here.

Could you possibly setup an example app (or single .rb file) that reproduces this?

[dewski]

Closing due to no response, please re-open when you can get me a few pieces of info as above.