From d75cc4b07ff7ccafa176418aeff58b000156df05 Mon Sep 17 00:00:00 2001
From: Andrew Brown <drusepth@gmail.com>
Date: Tue, 15 Jan 2019 18:11:26 -0600
Subject: [PATCH] require usernames to be alphanumeric

---
 app/models/user.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/app/models/user.rb b/app/models/user.rb
index dfc47b5b..caf95de0 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -13,6 +13,7 @@ class User < ApplicationRecord
 
   validates_uniqueness_of :username, allow_nil: true, allow_blank: true
   validates :username, length: { in: 1..20 }
+  validates :username, with: /^[A-Za-z0-9]+$/
 
   has_many :subscriptions,                dependent: :destroy
   has_many :billing_plans, through: :subscriptions