Class: AMEE::Db::Term

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/amee/db/term.rb

Overview

This class represents a database record for a calculation term used with the AMEE:DataAbstraction::OngoingCalculation class. This class stores the label, value and unit attributes of specific calculation terms, and is owned by an associated AMEE::Db::Calculation record

This class is typically used by proxy, via the #update_calculation!, and #to_hash methods of the AMEE::Db::Calculation class, and ultimately called from the find, find_by_type, #save, #delete, and #get_db_calculation methods associated with the AMEE:DataAbstraction::OngoingCalculation class.

Instance Method Summary collapse

Instance Method Details

#to_hash ⇒ Object

Returns a Hash representation of self, e.g.

my_term.to_hash       #=> { :value => 1600,
                            :unit => <Quantify::Unit::SI> }

my_term.to_hash       #=> { :value => 234.1,
                            :unit => <Quantify::Unit::NonSI>,
                            :per_unit => <Quantify::Unit::SI> }

This method is called as part of AMEE::Db::Calculation#to_hash in order to provide a full hash representation of a calculation.



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# File 'lib/amee/db/term.rb', line 40

def to_hash
  sub_hash = {}
  # Float method called on term value in order to initialize
  # explicitly numeric values as numeric objects.
  #
  sub_hash[:value] = AMEE::DataAbstraction::Term.convert_value_to_type(self.value, self.value_type)
  sub_hash[:unit] = Unit.for(unit) if unit
  sub_hash[:per_unit] = Unit.for(per_unit) if per_unit
  { label.to_sym => sub_hash }
end