Class: Rmodel::BaseMapper

Inherits:
Object
  • Object
show all
Defined in:
lib/rmodel/base_mapper.rb

Direct Known Subclasses

Mongo::Mapper, Sequel::Mapper

Instance Method Summary collapse

Constructor Details

#initialize(model) ⇒ BaseMapper

Returns a new instance of BaseMapper.



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# File 'lib/rmodel/base_mapper.rb', line 3

def initialize(model)
  @model = model
  self.primary_key = :id
  self.key_op = :to_sym
  @attributes = {}
end

Instance Method Details

#define_attribute(attr, mapper = DummyMapper.instance) ⇒ Object 



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# File 'lib/rmodel/base_mapper.rb', line 10

def define_attribute(attr, mapper = DummyMapper.instance)
  @attributes[attr] = mapper
  self
end

#define_attributes(*attributes) ⇒ Object 



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# File 'lib/rmodel/base_mapper.rb', line 15

def define_attributes(*attributes)
  attributes.each { |attr| define_attribute(attr) }
  self
end

#define_timestamps ⇒ Object 



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# File 'lib/rmodel/base_mapper.rb', line 20

def define_timestamps
  define_attributes :created_at, :updated_at
end

#deserialize(hash) ⇒ Object 



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# File 'lib/rmodel/base_mapper.rb', line 24

def deserialize(hash)
  return nil if hash.nil?

  uni_hash = UniHash.new(hash, key_op)

  object = @model.new
  object.id = uni_hash[primary_key] if object.respond_to?(:id)
  @attributes.each do |attr, mapper|
    deserialized = mapper.deserialize(uni_hash[attr])
    object.public_send "#{attr}=", deserialized
  end
  object
end

#serialize(object, id_included) ⇒ Object 



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# File 'lib/rmodel/base_mapper.rb', line 38

def serialize(object, id_included)
  return nil if object.nil?

  uni_hash = UniHash.new({}, key_op)
  @attributes.each do |attr, mapper|
    serialized = mapper.serialize(object.public_send(attr), id_included)
    uni_hash[attr] = serialized
  end
  if id_included && object.respond_to?(:id)
    uni_hash[primary_key] = object.id
  end
  uni_hash.to_hash
end