Migrate supplier to variant

db/migrate/20240422064305_migrate_product_supplier.rb

@@ -0,0 +1,11 @@
+class MigrateProductSupplier < ActiveRecord::Migration[7.0]
+  def up
+    ActiveRecord::Base.connection.execute(<<-SQL
+      UPDATE spree_variants
+      SET supplier_id = spree_products.supplier_id
+      FROM spree_products
+      WHERE spree_variants.product_id = spree_products.id
+    SQL
+    )
+  end
+end