data(backfill): Champs::RnfChamp.value_json [±400 occurences]

app/tasks/maintenance/populate_rnf_json_value_task.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module Maintenance
+  class PopulateRNFJSONValueTask < MaintenanceTasks::Task
+    include Dry::Monads[:result]
+
+    def collection
+      Champs::RNFChamp.where(value_json: nil)
+      # Collection to be iterated over
+      # Must be Active Record Relation or Array
+    end
+
+    def process(champ)
+      result = champ.fetch_external_data
+      case result
+      in Success(data)
+        begin
+          champ.update_with_external_data!(data:)
+        rescue ActiveRecord::RecordInvalid
+          # some champ might have dossier nil
+        end
+      else
+        # not found
+      end
+    end
+
+    def count
+      # not really interested in counting because it raises PG Statement timeout
+    end
+  end
+end