measurement.rb in unit_measurements-5.0.0

- old
+ new

@@ -99,20 +99,29 @@
     #
     # @example
     #   UnitMeasurements::Length.new(1, "m").convert_to("cm")
     #   => 100.0 cm
     #
-    # @param [String|Symbol] target_unit The target unit for conversion.
+    #   UnitMeasurements::Length.new(1, "cm").convert_to("primitive")
+    #   => 0.01 m
     #
+    # @param [String|Symbol] target_unit
+    #   The target unit for conversion. Specifing +primitive+ will convert the
+    #   measurement to a primitive unit of the unit group.
+    #
     # @return [Measurement]
     #   A new +Measurement+ instance with the converted +quantity+ and
     #   +target unit+.
     #
     # @author {Harshal V. Ladhe}[https://shivam091.github.io/]
     # @since 1.0.0
     def convert_to(target_unit)
-      target_unit = unit_from_unit_or_name!(target_unit)
+      target_unit = if target_unit.to_s.eql?("primitive")
+        self.class.unit_group.primitive
+      else
+        unit_from_unit_or_name!(target_unit)
+      end
 
       return self if target_unit == unit
 
       conversion_factor = (unit.conversion_factor / target_unit.conversion_factor)
 
@@ -186,10 +195,10 @@
       extend Forwardable
 
       # Methods delegated from the unit group.
       def_delegators :unit_group, :primitive, :units, :unit_names, :unit_with_name_and_aliases,
                      :unit_names_with_aliases, :unit_for, :unit_for!, :defined?,
-                     :unit_or_alias?, :[]
+                     :unit_or_alias?, :[], :units_for, :units_for!
 
       # Parses an input string and returns a +Measurement+ instance depending on
       # the input string. This method first normalizes the +input+ internally,
       # using the +Normalizer+ before parsing it using the +Parser+.
       #