Sha256: 54d6600d93f31ea2dd10a372eccfbcdd652e47a67937717df392d9e7c2e79390
Contents?: true
Size: 930 Bytes
Versions: 138
Compression:
Stored size: 930 Bytes
Contents
require 'csv'
# A book is simple, it has just:
# * a title
# * an author
# * an isbn
# * a publishing year
# * a publisher
# * a number of subjects
#
class Book
@@books_mapping = {}
# Load the books on startup.
#
file_name = File.expand_path 'library.csv', File.dirname(__FILE__)
CSV.open(file_name, 'r').each do |row|
@@books_mapping[row.shift.to_i] = row
end
# Find uses a lookup table.
#
def self.find ids, _ = {}
ids.map { |id| new(id, *@@books_mapping[id]) }
end
attr_reader :id
def initialize id, title, author, year, publisher, subjects
@id, @title, @author, @year, @publisher, @subjects = id, title, author, year, publisher, subjects
end
# "Rendering" ;)
#
# Note: This is just an example. Please do not render in the model.
#
def render
"<li class='book'><p>\"#{@title}\", by #{@author}</p><p>#{@year}, #{@publisher}</p><p>#{@subjects}</p></li>"
end
end
Version data entries
138 entries across 89 versions & 1 rubygems