Add selection_utilisateur geo_area to all champs carte with value

lib/tasks/deployment/20190731152733_migrate_geo_area_data.rake

@@ -0,0 +1,28 @@
+namespace :after_party do
+  desc 'Deployment task: migrate_geo_area_data'
+  task migrate_geo_area_data: :environment do
+    puts "Running deploy task 'migrate_geo_area_data'"
+
+    progress = ProgressReport.new(Champs::CarteChamp.count)
+
+    Champs::CarteChamp.includes(:geo_areas).find_each do |champ|
+      geo_area = champ.geo_areas.find(&:selection_utilisateur?)
+      geo_json = champ.geo_json_from_value
+
+      if geo_area.blank? && geo_json.present?
+        GeoArea.create(
+          champ: champ,
+          geometry: geo_json,
+          source: GeoArea.sources.fetch(:selection_utilisateur)
+        )
+        progress.inc
+      end
+    end
+
+    progress.finish
+
+    # Update task as completed.  If you remove the line below, the task will
+    # run with every deploy (or every time you call after_party:run).
+    AfterParty::TaskRecord.create version: '20190731152733'
+  end
+end