Handle datatype deletion

app/services/runtimes/data_types/update_service.rb

@@ -14,6 +14,9 @@ def initialize(current_runtime, data_types)
 
       def execute
         transactional do |t|
+          # rubocop:disable Rails/SkipsModelValidations -- when marking definitions as removed, we don't care about validations
+          DataType.where(runtime: current_runtime).update_all(removed_at: Time.zone.now)
+          # rubocop:enable Rails/SkipsModelValidations
           sort_data_types(data_types).each do |data_type|
             unless update_datatype(data_type, t)
               t.rollback_and_return! ServiceResponse.error(message: 'Failed to update data type',
@@ -48,6 +51,7 @@ def sort_data_types(data_types)
 
       def update_datatype(data_type, t)
         db_object = DataType.find_or_initialize_by(runtime: current_runtime, identifier: data_type.identifier)
+        db_object.removed_at = nil
         db_object.variant = data_type.variant.to_s.downcase
         if data_type.parent_type_identifier.present?
           db_object.parent_type = find_datatype(data_type.parent_type_identifier, t)

db/migrate/20250402181847_add_removed_at_to_data_types.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddRemovedAtToDataTypes < Code0::ZeroTrack::Database::Migration[1.0]
+  def change
+    add_column :data_types, :removed_at, :datetime_with_timezone
+  end
+end

db/schema_migrations/20250402181847

@@ -0,0 +1 @@
+44c7c0e62c4ab733012ec9043cbb198555e48790b2c9fbb8a9f0a45590dc4289

db/structure.sql

@@ -147,6 +147,7 @@ CREATE TABLE data_types (
     updated_at timestamp with time zone NOT NULL,
     parent_type_id bigint,
     runtime_id bigint NOT NULL,
+    removed_at timestamp with time zone,
     CONSTRAINT check_3a7198812e CHECK ((char_length(identifier) <= 50))
 );
 

spec/requests/grpc/sagittarius/data_type_service_spec.rb

@@ -105,5 +105,16 @@
         expect(small_positive_number.parent_type).to eq(positive_number)
       end
     end
+
+    context 'when removing datatypes' do
+      let!(:existing_data_type) { create(:data_type, runtime: runtime) }
+      let(:data_types) { [] }
+
+      it 'marks the datatype as removed' do
+        stub.update(message, authorization(runtime))
+
+        expect(existing_data_type.reload.removed_at).to be_present
+      end
+    end
   end
 end