Class: Zermelo::Associations::UniqueIndex

Inherits:
Object
  • Object
show all
Defined in:
lib/zermelo/associations/unique_index.rb

Instance Method Summary collapse

Constructor Details

#initialize(parent_klass, name) ⇒ UniqueIndex

Returns a new instance of UniqueIndex.



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# File 'lib/zermelo/associations/unique_index.rb', line 9

def initialize(parent_klass, name)
  @parent_klass   = parent_klass
  @attribute_name = name

  @backend   = parent_klass.send(:backend)

  parent_klass.send(:with_index_data, name.to_sym) do |data|
    @attribute_type = data.type
  end
end

Instance Method Details

#add_id(id, value) ⇒ Object 



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# File 'lib/zermelo/associations/unique_index.rb', line 24

def add_id(id, value)
  @backend.add(key, @backend.index_keys(@attribute_type, value).join(':') => id)
end

#delete_id(id, value) ⇒ Object 



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# File 'lib/zermelo/associations/unique_index.rb', line 20

def delete_id(id, value)
  @backend.delete(key, @backend.index_keys(@attribute_type, value).join(':'))
end

#key ⇒ Object 



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# File 'lib/zermelo/associations/unique_index.rb', line 33

def key
  @indexer ||= Zermelo::Records::Key.new(
    :klass  => @parent_klass,
    :name   => "by_#{@attribute_name}",
    :type   => :hash,
    :object => :index
  )
end

#key_dump ⇒ Object 



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# File 'lib/zermelo/associations/unique_index.rb', line 42

def key_dump
  [@backend.key_to_backend_key(key), key]
end

#move_id(id, value_from, indexer_to, value_to) ⇒ Object 



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# File 'lib/zermelo/associations/unique_index.rb', line 28

def move_id(id, value_from, indexer_to, value_to)
  @backend.move(key, {@backend.index_keys(@attribute_type, value_from).join(':') => id},
    indexer_to.key, {@backend.index_keys(@attribute_type, value_to).join(':') => id})
end