Class: SimplyStored::Couch::BelongsTo::Property

Inherits:
Object
  • Object
show all
Defined in:
lib/simply_stored/couch/belongs_to.rb

Overview

:nodoc:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(owner_clazz, name, options = {}) ⇒ Property 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 50

def initialize(owner_clazz, name, options = {})
  @name = name
  @options = {
    :class_name => name.to_s.singularize.camelize
  }.update(options)

  @options.assert_valid_keys(:class_name)

  owner_clazz.class_eval do
    attr_accessor "#{name}_id_was"
    property "#{name}_id"
    
    define_method name do |*args|
      local_options = args.last.is_a?(Hash) ? args.last : {}
      local_options.assert_valid_keys(:force_reload, :with_deleted)
      forced_reload = local_options[:force_reload] || false
      with_deleted = local_options[:with_deleted] || false
      
      return instance_variable_get("@#{name}") unless instance_variable_get("@#{name}").nil? or forced_reload
      instance_variable_set("@#{name}", send("#{name}_id").present? ? Object.const_get(self.class._find_property(name).options[:class_name]).find(send("#{name}_id"), :with_deleted => with_deleted) : nil)
    end
  
    define_method "#{name}=" do |value|
      klass = self.class.get_class_from_name(self.class._find_property(name).options[:class_name])
      raise ArgumentError, "expected #{klass} got #{value.class}" unless value.nil? || value.is_a?(klass)

      new_foreign_id = value.nil? ? nil : value.id

      send("#{name}_id=", new_foreign_id)
      instance_variable_set("@#{name}", value)
    end

    define_method "#{name}_id=" do |new_foreign_id|
      super(new_foreign_id)
      value = instance_variable_get("@#{name}")
      remove_instance_variable("@#{name}") if instance_variable_defined?("@#{name}")
    end
    
    define_method "#{name}_changed?" do
      self.send("#{name}_id") != self.send("#{name}_id_was")
    end
  end
end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/simply_stored/couch/belongs_to.rb', line 48

def name
  @name
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/simply_stored/couch/belongs_to.rb', line 48

def options
  @options
end

Instance Method Details

#association? ⇒ Boolean 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 112

def association?
  true
end

#build(object, json) ⇒ Object 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 102

def build(object, json)
  object.send "#{name}_id=", json["#{name}_id"]
  object.send "#{name}_id_was=", json["#{name}_id"]
end

#dirty?(object) ⇒ Boolean 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 94

def dirty?(object)
  object.send("#{name}_id_was") != object.send("#{name}_id")
end

#reset_dirty_attribute(object) ⇒ Object 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 98

def reset_dirty_attribute(object)
  object.send("#{name}_id_was=", object.send("#{name}_id"))
end

#serialize(json, object) ⇒ Object Also known as: value 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 107

def serialize(json, object)
  json["#{name}_id"] = object.send("#{name}_id") if object.send("#{name}_id")
end