Jbuilder not wrapping single object in collection - ruby-on-rails

Question

I have a index view in my rails application that allows filtering via search params. When a group op articles are returned its is wropped in an articles colllection like {"articles":[{"article":{"id":341,"updated":"2015-08-18T13:05:08.427Z","title":". But if only a single object is found the articles level is missing, {"article":{"id":398,"updated":"2015-08-07T11:37:26.200Z","title":. How can I fix it so that a single object behaves like multiple?
_articles.list.json.jbuilder
require 'uri'
require 'publish_on'
json.cache! ['v1', articles] do
json.articles articles do |article|
json.cache! ['v1', article] do
json.article do
json.id article.id
json.updated as_ns_date(article.updated_at)
json.title article.label
json.numberOfViews article.view_mappings.count
json.numberOfFavorites article.favorite_mappings.count
json.imageURLs article.images if article.images.any?
json.youtubeURL article.youtube unless article.youtube.blank?
json.tags article.categories.map(&:label)
json.isFeatured article.featured
json.isPublished article.is_published
json.published as_ns_date(article.publish_on)
end
end
end
end
index.json.jbuilder
json.partial! 'articles/articles_list', articles: #articles
articles_controller.rb
def index
#articles = SearchArticlesCommand.new(params).execute
render :index
end
search_articles_command.rb
class SearchArticlesCommand
def initialize(params = {})
#since = params[:since_date]
#keys = params[:search_query]
#category = params[:category]
end
def execute
Article.unscoped do
query = if #since.present?
Article.article.since_date(#since)
else
Article.published_article
end
query = query.search_by_keywords(#keys) if #keys.present?
query = query.search_by_category(#category) if #category.present?
query.select(:id, :updated_at, :label, :is_published, :featured, :slug, :created_at).order(created_at: :desc)
end
end
end
article.rb
class Article < Comfy::Cms::Page
include PgSearch
include ActionView::Helpers::SanitizeHelper
HOSTNAME = ENV['HOSTNAME'] || Socket.gethostname
has_many :view_mappings, dependent: :destroy
has_many :favorite_mappings, dependent: :destroy
pg_search_scope :search_by_keywords, against: [:content_cache, :label], using: { tsearch: { any_word: true, prefix: true } }
pg_search_scope :search_by_category, associated_against: {
categories: [:label]
}
scope :since_date, -> (date) { where('created_at > ? OR updated_at > ? ', date, date) if date.present? }
scope :folder, -> { where.not(layout_id: ENV['ARTICLE_LAYOUT_ID']) }
scope :published_article, -> { published.article }
scope :article, -> { where(layout_id: ENV['ARTICLE_LAYOUT_ID']) }

Answer 1

It is what i suspected. If you want the same behavior your query should return the same type of object when it finds one or many articles. The problem is that either you are returning an ActiveRecordRelation or a Article object depending on your params.
#articles = Article.all # => ActiveRecordRelation, an array per se
#articles = Article.find(1) # => Article object
When it comes to jbuilder to construct the JSON it checks if it is an array of objects and then wrap the json with a { keyword => array }. WHen it is a single object, it defaults to a single object {article: {}}.
The solution is simple, you can tweak your SearchArticlesCommand to always return an ActiveRecordRelation, even if it finds only one object.