Active Record

activerecord_reading.rb

# Reading with active record

# inspecting an object
# this will output the value 
puts Object.first.inspect 

# counts the number of objects in the database
puts Object.count
puts Object.size

# Getting the first row in the database
puts Object.first.inspect

# Getting the last row in the database
puts Object.last.inspect

# getting all the customers and storing it into a variable

activrecord_create.rb

#create the object
#It will create a new object from the model Object 
#That links to a Objects table in the database
new_entry = Object.new

#Add attributes to the object
new_entry.name = "Object Name"

#save the objects value to the database
new_entry.save

####Another way of creating entries
#create the object and pass the values as a hash.
second_entry = Object.new(:name => "Second Object", :description => "I'm an object in object space")
#save the object 
second_object.save

####Another way of creating + saving the entries
#create the object
third_entry = Object.create(:name => "Third Object", :description => "I am also an object in database space"

object.rb

# This is the object model, there exist in the database a table called Objects
class Object < ActiveRecord::Base
  validates_presence_of :name, :description
  belongs_to :type
end

type.rb

# The type model, in the database there's a table that has the name of Types
class Type < ActiveRecord::Base
  validates_presence_of :type, :description
  has_many :objects
end