personal-book/app/models/book.rb

class Book
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Attributes::Dynamic

  include OrbitModel::Status
  include MemberHelper
  include Slug

  field :book_title, as: :slug_title, type: String, localize: true
  field :extracted_chapters, type: String, localize: true
  field :publisher, type: String, localize: true
  field :editor, type: String, localize: true
  field :year, type: String
  field :language, type: String
  field :publish_date, type: DateTime
  field :pages, type: String
  field :isbn, type: String
  field :keywords, type: String
  field :publication_date, type: DateTime
  field :url, type: String
  field :note, type: String
  
  paginates_per 10

  belongs_to :member_profile

  has_many :book_files, autosave: true, dependent: :destroy
  accepts_nested_attributes_for :book_files

  has_and_belongs_to_many :book_authors
  accepts_nested_attributes_for :book_authors

  belongs_to :book_type
  before_validation :add_http

  after_save :save_book_files, :save_book_authors


  def create_link
    title = []
    title << "#{self.book_authors.collect{|j| j.name}.join(', ')}" if self.book_authors.present?
    title << self.book_title if self.book_title.present?
    title << self.publisher if self.publisher.present?
    title << self.isbn if self.isbn.present?

    if !self.publish_date.nil?
      pd = self.publish_date.strftime("%Y-%m-%d").split('-')
      title << pd[0]+"/"+pd[1]
    end

    title.join(', ') 
  end

  def self.member_data
    members = MemberProfile.all
    member_data = [] 
    members.each do |m| 
      member_data << {"memberId" => m.id.to_s, "memberName" => m.name}
    end
    member_data.to_json
  end

  def save_book_files
    self.book_files.each do |t|
      if t.should_destroy
        t.destroy
      end
    end
  end

  def save_book_authors
    self.book_authors.each do |t|
      if t.should_destroy
        t.destroy
      end
    end
  end

  def authors
    authors = []
    authors << self.member_profile.name if self.member_profile_id.present?
    authors << (!self.book_authors.blank? ? "#{self.book_authors.collect{|j| j.name}.join(', ')}" : nil)
    authors.join(', ')
  end

  protected

  def add_http
    unless self.url.blank? || self.url[/^http:\/\//] || self.url[/^https:\/\//]
      self.url = 'http://' + self.url
    end
  end
end