Class: ViewModel::References

Inherits:
Object
  • Object
show all
Defined in:
lib/view_model/references.rb

Overview

A bucket for configuration, used for serializing and deserializing.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ References

Returns a new instance of References.



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# File 'lib/view_model/references.rb', line 8

def initialize
  @last_ref = 0
  @ref_by_value = {}
  @value_by_ref = {}
end

Instance Method Details

#add_reference(value) ⇒ Object

Takes a reference to a thing that is to be shared, and returns the id under which the data is stored. If the data is not present, will compute it by calling the given block.



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# File 'lib/view_model/references.rb', line 21

def add_reference(value)
  ref = @ref_by_value[value]

  unless ref.present?
    ref = new_ref!(value)
    @ref_by_value[value] = ref
    @value_by_ref[ref] = value
  end

  ref
end

#clear! ⇒ Object 



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# File 'lib/view_model/references.rb', line 33

def clear!
  @ref_by_value.clear
  @value_by_ref.clear
end

#has_references? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/view_model/references.rb', line 14

def has_references?
  @ref_by_value.present?
end