Module: Persistent

Defined in:
lib/persistent.rb,
lib/persistent/store.rb

Defined Under Namespace

Modules: ClassMethods Classes: Store

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object

This module gives you objects:

class Person
  include Persistent

   attr_accessor :name, :last_name
end

Person.store = Persistent::Store.new('/path/to/store_file.store') # or anything that looks like a Hash.

o = Person.new

o.name = 'Ismael'
o.last_name = 'Celis'

# == Save and namespace unique ID by class name

o.persist! 'some_unique_id'

o2 = Person.find( 'some_unique_id' )

o2.name # => 'Ismael'

o2 == o # => true

o.destroy!



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# File 'lib/persistent.rb', line 32

def self.included(base)
  base.extend ClassMethods
  class << base
    attr_accessor :store
  end
  
  # The only reason an instance wants to know about their persistence id is so we can call destroy! on it.
  # Why not use auto-generated ID's? Because I might want to use them as URL permalinks, for example
  #
  base.class_eval do
    attr_accessor :_persisted_id
  end
end

Instance Method Details

#destroy! ⇒ Object 



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# File 'lib/persistent.rb', line 51

def destroy!
  return false unless self._persisted_id
  store.delete(persistent_key(_persisted_id))
end

#persist!(id) ⇒ Object 



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# File 'lib/persistent.rb', line 46

def persist!(id)
  self._persisted_id = id
  store[persistent_key(id)] = self
end