Add migration to fix calculator preferences

db/migrate/20200721135726_move_calculators_preferences_outside_spree_namespace.rb

@@ -0,0 +1,23 @@
+# As we moved the calculators outside the Spree namespace in migration MoveAllCalculatorsOutsideTheSpreeNamespace
+#   We need to move their preferences too (currency, value, etc), otherwise they are not used
+class MoveCalculatorsPreferencesOutsideSpreeNamespace < ActiveRecord::Migration
+  def up
+    replace_preferences_key("/spree/calculator", "/calculator")
+  end
+
+  def down
+    replace_preferences_key("/calculator", "/spree/calculator")
+  end
+
+  private
+
+  def replace_preferences_key(from_pattern, to_pattern)
+    updated_pref_key = "replace( pref.key, '" + from_pattern + "', '" + to_pattern + "')"
+    Spree::Preference.connection.execute(
+      "UPDATE spree_preferences pref SET key = " + updated_pref_key + "
+        WHERE pref.key like '" + from_pattern + "%'
+          AND NOT EXISTS (SELECT 1 FROM spree_preferences existing_pref
+                           WHERE existing_pref.key = " + updated_pref_key + ")"
+    )
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20200702112157) do
+ActiveRecord::Schema.define(version: 20200721135726) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"