Allow GSI in TableConfig without capacity settings

CHANGELOG.md

@@ -1,6 +1,9 @@
 Unreleased Changes
 ------------------
 
+* Issue - Allow `global_secondary_index` to be defined in `TableConfig` without 
+  supplying capacity settings. (#140)
+
 2.13.1 (2024-07-18)
 ------------------
 

lib/aws-record/record/table_config.rb

@@ -176,7 +176,7 @@ def write_capacity_units(units)
       # @api private
       def global_secondary_index(name, &block)
         gsi = GlobalSecondaryIndex.new
-        gsi.instance_eval(&block)
+        gsi.instance_eval(&block) if block_given?
         @global_secondary_indexes[name] = gsi
       end
 

spec/aws-record/record/table_config_spec.rb

@@ -25,16 +25,26 @@ def configure_test_client(client)
         end
       end
 
-      it 'accepts global secondary indexes in the definition' do
-        TableConfig.define do |t|
-          t.model_class(TestModelWithGsi)
-          t.read_capacity_units(2)
-          t.write_capacity_units(2)
-          t.global_secondary_index(:gsi) do |i|
-            i.read_capacity_units(1)
-            i.write_capacity_units(1)
+      context 'global secondary indexes' do
+        it 'accepts with capacity settings defined' do
+          TableConfig.define do |t|
+            t.model_class(TestModelWithGsi)
+            t.read_capacity_units(2)
+            t.write_capacity_units(2)
+            t.global_secondary_index(:gsi) do |i|
+              i.read_capacity_units(1)
+              i.write_capacity_units(1)
+            end
+            t.client_options(stub_responses: true)
+          end
+        end
+
+        it 'accepts without capacity settings defined' do
+          TableConfig.define do |t|
+            t.model_class(TestModelWithGsi)
+            t.global_secondary_index(:gsi)
+            t.client_options(stub_responses: true)
           end
-          t.client_options(stub_responses: true)
         end
       end