Added released scope to Book model

.gitignore

@@ -33,3 +33,5 @@ lib/assets/*.csv
 lib/imports/*/*.csv
 
 node_modules
+
+*.csv

app/controllers/books_controller.rb

@@ -3,10 +3,10 @@
 class BooksController < ApplicationController
   # NOTE: Remember to see .jbuilder
   def index
-    @books = Book.all
+    @books = Book.released
   end
 
   def show
-    @book = Book.find(params[:id])
+    @book = Book.released.find(params[:id])
   end
 end

app/models/book.rb

@@ -4,6 +4,15 @@
 class Book < ApplicationRecord
   has_many :chapters, :dependent => :destroy
 
+  # @brief Returns the released `Book`s
+  # @example `@books = Book.released`
+  # @return [ActiveRecord::Relation] Set of released Books.
+  if Rails.env.production?
+    scope :released, -> { all }
+  else
+    scope :released, -> { where.not(:en_short_summary => nil) }
+  end
+
   def last_chapter
     return self.chapters.last
   end