Explain why a index forbids more than a location

2026-02-27 01:43:22 +00:00 · 2019-01-09 18:56:40 +01:00
parent 10a678bdfe
commit 817bf4caa1
1 changed files with 3 additions and 0 deletions
--- a/db/migrate/20180906094641_add_uniqueness_of_variant_id_to_spree_stock_items.rb
+++ b/db/migrate/20180906094641_add_uniqueness_of_variant_id_to_spree_stock_items.rb
@@ -1,3 +1,6 @@
+# Since OFN has only a single default StockLocation, variants in OFN can only
+# have a stock item. By adding this unique index we constraint that at DB level
+# ensuring data integrity.
 class AddUniquenessOfVariantIdToSpreeStockItems < ActiveRecord::Migration
  def change
    add_index :spree_stock_items, :variant_id, unique: true