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

Returns a new instance of Property.



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# File 'lib/simply_stored/couch/belongs_to.rb', line 51

def initialize(owner_clazz, name, options = {})
  @name, @options = name, options
  item_class_name = self.item_class_name
  owner_clazz.class_eval do
    attr_reader "#{name}_id"
    attr_accessor "#{name}_id_was"
    property "#{name}_id"
    
    define_method name do |*args|
      options = args.last.is_a?(Hash) ? args.last : {}
      options.assert_valid_keys(:force_reload, :with_deleted)
      forced_reload = options[:force_reload] || false
      with_deleted = 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(item_class_name).find(send("#{name}_id"), :with_deleted => with_deleted) : nil)
    end
  
    define_method "#{name}=" do |value|
      klass = self.class.get_class_from_name(name)
      raise ArgumentError, "expected #{klass} got #{value.class}" unless value.nil? || value.is_a?(klass)

      instance_variable_set("@#{name}", value)
      if value.nil?
        instance_variable_set("@#{name}_id", nil)
      else
        instance_variable_set("@#{name}_id", value.id)
      end
    end

    define_method "#{name}_id=" do |id|
      remove_instance_variable("@#{name}") if instance_variable_defined?("@#{name}")
      instance_variable_set("@#{name}_id", id)
    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 49

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 49

def options
  @options
end

Instance Method Details

#association? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/simply_stored/couch/belongs_to.rb', line 120

def association?
  true
end

#build(object, json) ⇒ Object 



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

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

#destroy(object) ⇒ Object 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 103

def destroy(object)

end

#dirty?(object) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/simply_stored/couch/belongs_to.rb', line 95

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

#item_class_name ⇒ Object 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 116

def item_class_name
  @name.to_s.camelize
end

#reset_dirty_attribute(object) ⇒ Object 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 99

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

#save(object) ⇒ Object 



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# File 'lib/simply_stored/couch/belongs_to.rb', line 92

def save(object)
end

#serialize(json, object) ⇒ Object 



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

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