From f6e507366930ae7fe72ac605ba053fbd166279af Mon Sep 17 00:00:00 2001
From: Keenan Brock <keenan@thebrocks.net>
Date: Tue, 8 Dec 2020 20:30:18 -0500
Subject: [PATCH] Introduce User#lower_email for case insensitive email lookups

---
 app/models/user.rb | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/app/models/user.rb b/app/models/user.rb
index a0b3d82a494..1d0e21d65d8 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -109,12 +109,19 @@ def self.lookup_by_email(email)
   # often we have the most probably user object onhand. so use that if possible
   def self.lookup_by_lower_email(email, cache = [])
     email = email.downcase
-    Array.wrap(cache).detect { |u| u.email.try(:downcase) == email } || find_by(['lower(email) = ?', email])
+    Array.wrap(cache).detect { |u| u.lower_email == email } || find_by(:lower_email => email)
   end
 
   singleton_class.send(:alias_method, :find_by_lower_email, :lookup_by_lower_email)
   Vmdb::Deprecation.deprecate_methods(singleton_class, :find_by_lower_email => :lookup_by_lower_email)
 
+  def lower_email
+    email&.downcase
+  end
+
+  virtual_attribute :lower_email, :string, :arel => ->(t) { t.grouping(t[:email].lower) }
+  hidden_attribute :lower_email
+
   def lower_userid
     userid&.downcase
   end