Class: Rie::BaseChanger

Inherits:
Object
  • Object
show all
Defined in:
lib/rie/base_changer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, attrs) ⇒ BaseChanger

Returns a new instance of BaseChanger.



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# File 'lib/rie/base_changer.rb', line 4

def initialize(id, attrs)
  @id = id
  @original = attrs.dup.freeze
  @changes = {}
  @retractions = Set.new
end

Instance Attribute Details

#changes ⇒ Object (readonly)

Returns the value of attribute changes.



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# File 'lib/rie/base_changer.rb', line 3

def changes
  @changes
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/rie/base_changer.rb', line 3

def id
  @id
end

#original(key) ⇒ Object (readonly)

Returns the value of attribute original.



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# File 'lib/rie/base_changer.rb', line 3

def original
  @original
end

#retractions ⇒ Object (readonly)

Returns the value of attribute retractions.



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# File 'lib/rie/base_changer.rb', line 3

def retractions
  @retractions
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/rie/base_changer.rb', line 36

def [](key)
  return nil if @retractions.include? key
  @changes.fetch(key) { @original[key] }
end

#[]=(key, val) ⇒ Object 



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# File 'lib/rie/base_changer.rb', line 49

def []=(key, val)
  if val.nil?
    @retractions << key
  else
    @retractions.delete(key)
    @changes[key] = val
  end
end

#change(key = nil, &b) ⇒ Object 



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# File 'lib/rie/base_changer.rb', line 15

def change(key=nil, &b)
  b.call(self)
  self
end

#change!(&b) ⇒ Object 



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# File 'lib/rie/base_changer.rb', line 31

def change!(&b)
  change(&b)
  save!
end

#change_in(key) ⇒ Object 



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# File 'lib/rie/base_changer.rb', line 45

def change_in(key)
  [original(key), self[key]]
end

#change_ref(key, &b) ⇒ Object 



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# File 'lib/rie/base_changer.rb', line 20

def change_ref(key, &b)
  attribute = model.get_attribute(key)
  type = attribute.type

  unless type.respond_to? :ref_class
    raise ::TypeError, "change_ref only works on refs - #{key} is a #{type.inspect} is not a ref"
  end

  self[key] = self[key] ? self[key].change(&b) : type.ref_class.create(&b)
end

#generate_datoms {|model.base_attributes.merge(:'db/id' => @id)| ... } ⇒ Object

Yields:

  • (model.base_attributes.merge(:'db/id' => @id)) 


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# File 'lib/rie/base_changer.rb', line 64

def generate_datoms(&b)
  return enum_for(:generate_datoms).to_a unless block_given?

  yield model.base_attributes.merge(:'db/id' => @id)
  @changes.each do |key, new_val|
    attribute = model.get_attribute(key)
    attribute.datoms_for(self, new_val, &b)
  end
end

#retract!(attribute) ⇒ Object 



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# File 'lib/rie/base_changer.rb', line 11

def retract!(attribute)
  @retractions << attribute
end

#updated_attributes ⇒ Object 



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# File 'lib/rie/base_changer.rb', line 58

def updated_attributes
  out = model.attributes.merge(@changes)
  @retractions.each { |r| out.delete(r) }
  out
end