rabl 的一些坑

tldr：jbuilder 劣化版？

partial 只能传 object

node(:data) do
  partial "v3.1/news_feeds/_news_feed", object: @news_feeds
end

嵌套节点要写成 hash

node(:display_style) do |m|
  {
    :type => m.display_type,
    :number => NewsFeed.display_nums[m.display_num]
  }
end

条件判断要用 lambda

node(:contents, :if => lambda { |m| m.standard_products.any? } ) do |m|
  partial("v3.1/news_feeds/standard_products", object: m.standard_products)
end
node(:contents, :if => lambda { |m| m.pictures.any? } ) do |m|
  partial("v3.1/news_feeds/pictures", object: m.pictures)
end