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reflection

All metadata and reflection is accessed via the doodle method.

attribute definitions

class Named < Doodle
  has :name
end

class Person < Named
  has :age, :kind => Integer do
    must "be >= 0" do |v|
      v >= 0
    end
  end
end

pp Person.doodle.attributes
# >> {:name=>
# >>   #<Doodle::DoodleAttribute:0x551d9c
# >>    @doodle_owner=#<Class:0x5a193c>,
# >>    @name=:name>,
# >>  :age=>
# >>   #<Doodle::DoodleAttribute:0x9a1f0
# >>    @doodle_owner=#<Class:0x550438>,
# >>    @kind=[Integer],
# >>    @name=:age>}

If you want to see just those attributes defined in a specific class (i.e. exclude inherited attributes), pass false to the attributes method:

pp Person.doodle.attributes(false)
# >> {:age=>
# >>   #<Doodle::DoodleAttribute:0x9a0ec
# >>    @doodle_owner=#<Class:0x5503d4>,
# >>    @kind=[Integer],
# >>    @name=:age>}

keys

person = Person :name => "Corum", :age => 999
Person.doodle.keys       # => [:name, :age]
person.doodle.keys       # => [:name, :age]

values

person.doodle.values     # => ["Corum", 999]

keys and values

person.doodle.key_values # => [[:name, "Corum"], [:age, 999]]

validations

Validations belong to either the class as a whole or individual attributes. As attributes are themselves doodles, you need to access their metadata via their own doodle method:

class Person < Doodle
  has :name, :kind => String
  has :age, :kind => Integer do
    must "be >= 0" do |v|
      v >= 0
    end
  end
  must "not be called Arthur" do
    name !~ /^Arthur$/
  end
end

pp Person.doodle.validations
puts
pp Person.doodle.attributes[:age].doodle.validations
# >> [#<Doodle::Validation:0x8b434
# >>   @block=#<Proc:0x0058d07c@-:11>,
# >>   @message="not be called Arthur">]
# >> 
# >> [#<Doodle::Validation:0x98224
# >>   @block=
# >>    #<Proc:0x0057c330@/Users/ohalps01/work/doodle/lib/doodle/validation.rb:32>,
# >>   @message="be a kind of Integer">,
# >>  #<Doodle::Validation:0x8b4fc
# >>   @block=#<Proc:0x0058d234@-:7>,
# >>   @message="be >= 0">]

conversions

Like validations, conversions belong to the class or individual attributes:

class Person < Doodle
  has :name, :kind => String
  has :age, :kind => Integer do
    from String do |s|
      s.to_i
    end
  end
end

pp Person.doodle.attributes[:age].doodle.conversions
# >> {String=>#<Proc:0x0058d270@-:7>}
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