rudimentary support for querying current data_version

server/app/graphql/types/meta_type.rb

@@ -0,0 +1,9 @@
+module Types
+  class MetaType < Types::BaseObject
+    field :data_version, String, null: false
+
+    def data_version
+      DATA_VERSION
+    end
+  end
+end

server/app/graphql/types/query_type.rb

@@ -13,6 +13,8 @@ class QueryType < Types::BaseObject
     field :categories, resolver: Resolvers::Categories
     field :interaction_claim_types, resolver: Resolvers::InteractionClaimTypes
 
+    field :dgidb_meta, Types::MetaType, null: false
+
     field :drug_suggestions, [Types::DrugSuggestionType], null: true do
       description "A searchable drug name or alias that can be completed from the supplied term"
       argument :term, String, required: true
@@ -331,5 +333,9 @@ def interaction(id:)
     def publication(id:)
       Publication.find_by(id: id)
     end
+
+    def dgidb_meta
+      {}
+    end
   end
 end

server/config/initializers/dataset_version.rb

@@ -0,0 +1,8 @@
+file = File.join(Rails.root, 'data_version.yml')
+data = YAML.load_file(file)
+
+DATA_VERSION = data.dig('version')
+
+if DATA_VERSION.nil?
+  raise StandardError.new("Missing or malformed data_version.yml. Expect file at Rails.root with a version: key")
+end

server/data_version.yml

@@ -0,0 +1 @@
+version: Dec-2023