Replace hard-deleted prices with empty (0.00) price records

db/migrate/20190913023137_replace_hard_deleted_prices.rb

@@ -0,0 +1,11 @@
+class ReplaceHardDeletedPrices < ActiveRecord::Migration
+  def up
+    ActiveRecord::Base.connection.execute(
+      "INSERT into spree_prices (variant_id, amount, currency, deleted_at)
+      SELECT spree_variants.id, '0.00', (SELECT value FROM spree_preferences WHERE key = 'spree/app_configuration/currency'), now()
+      FROM spree_variants
+      LEFT OUTER JOIN spree_prices ON (spree_variants.id = spree_prices.variant_id)
+      WHERE spree_prices.id IS NULL;"
+    )
+  end
+end