Method missing update_attribute

Question

I have three models:

1. Store (has_many :products)
2. Product (has_many :product_fields and belongs_to :store
3. Product_fields (has a belongs_to :product)

I'm using Sidekiq to update a column in product_fields called content (When I create the model I insert a url in a column in the same model called second_content so the original content column is null on create, but then I am trying to update the content column in my worker to a new value. Here is my worker:

def perform(store_id)
   store = Store.find(store_id)

   store.products.each do |product|
      if product.type_of == "Video"
        video_url = URI.parse product.product_fields[0].second_content
        video = open("LINK HERE").read
        video = ActiveSupport::JSON.decode video

        product.product_fields[0].update_attribute(:content, video)
      end
   end
end

and my controller's create action looks like:

def create
   @store = Store.new(store_params)
   respond_to do |format|
      if @store.save

          #Start video job
          VideosWorker.perform_async(@store.id)

          format.html { redirect_to @store, notice: 'Store was successfully created.' }
      end
   end
end

Everything seems to be working, except in the Sidekiq terminal I get the error:

undefined method `update_attribute' for #<ActiveRecord::Associations::CollectionProxy::ActiveRecord_Associations_CollectionProxy_ProductField:0x0000010531bdd8>

Answer 1

Use:

product.product_fields.first.update_attribute(:content, video)

instead of:

product.product_fields[0].update_attribute(:content, video)

as you cannot call update_attribute on a CollectionProxy object also make sure video is a string