Class: CouchPotato::Persistence::SimpleProperty

Inherits:
Object
  • Object
show all
Defined in:
lib/couch_potato/persistence/simple_property.rb

Overview

:nodoc:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

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

Returns a new instance of SimpleProperty.



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# File 'lib/couch_potato/persistence/simple_property.rb', line 6

def initialize(owner_clazz, name, options = {})
  self.name = name
  self.type = options[:type]
  owner_clazz.class_eval do
    attr_reader name, "#{name}_was"
    
    def initialize(attributes = {})
      super attributes
      assign_attribute_copies_for_dirty_tracking
    end
    
    def assign_attribute_copies_for_dirty_tracking
      attributes.each do |name, value|
        self.instance_variable_set("@#{name}_was", clone_attribute(value))
      end if attributes
    end
    private :assign_attribute_copies_for_dirty_tracking
    
    def clone_attribute(value)
      if [Fixnum, Symbol, TrueClass, FalseClass, NilClass, Float].include?(value.class)
        value
      else
        value.clone
      end
    end
    
    define_method "#{name}=" do |value|
      self.instance_variable_set("@#{name}", value)
    end
    
    define_method "#{name}?" do
      !self.send(name).nil? && !self.send(name).try(:blank?)
    end
    
    define_method "#{name}_changed?" do
      !self.instance_variable_get("@#{name}_not_changed") && self.send(name) != self.send("#{name}_was")
    end
    
    define_method "#{name}_not_changed" do
      self.instance_variable_set("@#{name}_not_changed", true)
    end
  end
end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/couch_potato/persistence/simple_property.rb', line 4

def name
  @name
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/couch_potato/persistence/simple_property.rb', line 4

def type
  @type
end

Instance Method Details

#build(object, json) ⇒ Object 



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# File 'lib/couch_potato/persistence/simple_property.rb', line 50

def build(object, json)
  value = json[name.to_s] || json[name.to_sym]
  typecasted_value =  if type
                        type.json_create value
                      else
                        value
                      end
  object.send "#{name}=", typecasted_value
end

#destroy(object) ⇒ Object 



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# File 'lib/couch_potato/persistence/simple_property.rb', line 68

def destroy(object)
  
end

#dirty?(object) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/couch_potato/persistence/simple_property.rb', line 60

def dirty?(object)
  object.send("#{name}_changed?")
end

#save(object) ⇒ Object 



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# File 'lib/couch_potato/persistence/simple_property.rb', line 64

def save(object)
  
end

#serialize(json, object) ⇒ Object 



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# File 'lib/couch_potato/persistence/simple_property.rb', line 72

def serialize(json, object)
  json[name] = object.send name
end