Fix recurring blackout date creation

Resolves #1698

CHANGELOG.md

@@ -12,6 +12,7 @@
 * Fixed the equipment model seed script generator ([#1662](https://github.com/YaleSTC/reservations/issues/1662)).
 * Fixed broken database migrations ([#1676](https://github.com/YaleSTC/reservations/issues/1676), [#1684](https://github.com/YaleSTC/reservations/issues/1684)).
 * Fixed Heroku deployments by updating post-deploy script and switching to MySQL ([#1680](https://github.com/YaleSTC/reservations/issues/1680), [#1690](https://github.com/YaleSTC/reservations/issues/1690)).
+* Fixed the creation of recurring blackouts ([#1698](https://github.com/YaleSTC/reservations/issues/1698)).
 
 ### Added
 * Added ordering of equipment models within the catalog ([#1418](https://github.com/YaleSTC/reservations/issues/1418)).

app/controllers/blackouts_controller.rb

@@ -1,8 +1,9 @@
 # frozen_string_literal: true
+
 class BlackoutsController < ApplicationController
   load_and_authorize_resource
   before_action :set_current_blackout,
-                only: [:edit, :show, :update, :destroy, :destroy_recurring]
+                only: %i[edit show update destroy destroy_recurring]
 
   # ---------- before filter methods ------------ #
 
@@ -31,8 +32,7 @@ def new_recurring
                              end_date: Time.zone.today + 1.day)
   end
 
-  def edit
-  end
+  def edit; end
 
   def create_recurring
     # called when a recurring blackout is needed
@@ -41,7 +41,7 @@ def create_recurring
 
     @blackout = Blackout.new(blackout_params) # for the form if there are errors
 
-    if params[:blackout][:days].first.blank?
+    if params[:blackout][:days].reject(&:blank?).empty?
       flash[:error] = 'You must select at least one day of the week for any '\
       'recurring blackouts to be created.'
       render('new_recurring') && return