refactor(type de champ): extract routable? method

app/models/procedure_revision.rb

@@ -224,7 +224,7 @@ class ProcedureRevision < ApplicationRecord
   end
 
   def routable_types_de_champ
-    types_de_champ_public.filter { |tdc| [:drop_down_list, :departements, :regions, :communes].include?(tdc.type_champ.to_sym) }
+    types_de_champ_public.filter(&:routable?)
   end
 
   private

app/models/type_de_champ.rb

@@ -98,6 +98,13 @@ class TypeDeChamp < ApplicationRecord
     cojo: 'cojo'
   }
 
+  ROUTABLE_TYPES = [
+    type_champs.fetch(:drop_down_list),
+    type_champs.fetch(:communes),
+    type_champs.fetch(:departements),
+    type_champs.fetch(:regions)
+  ]
+
   store_accessor :options,
                  :cadastres,
                  :old_pj,
@@ -566,6 +573,10 @@ class TypeDeChamp < ApplicationRecord
     end
   end
 
+  def routable?
+    type_champ.in?(ROUTABLE_TYPES)
+  end
+
   private
 
   DEFAULT_EMPTY = ['']