Merge pull request #3114 from nebulab/drop-table-from-20180710170104

Add migration to drop table/column from `20180710170104`

core/db/migrate/20190220093635_drop_spree_store_credit_update_reasons.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class DropSpreeStoreCreditUpdateReasons < ActiveRecord::Migration[5.1]
+  # This migration should run in a subsequent deploy after 20180710170104
+  # has been already deployed. See also migration 20180710170104.
+
+  # We can't add back the table in a `down` method here: a previous version
+  # of migration 20180710170104 would fail with `table already exists` , as
+  # it handles itself the add/remove of this table and column.
+  def up
+    if table_exists? :spree_store_credit_update_reasons
+      drop_table :spree_store_credit_update_reasons
+    end
+
+    if column_exists? :spree_store_credit_events, :update_reason_id
+      remove_column :spree_store_credit_events, :update_reason_id
+    end
+  end
+end