rubocop noise: introduced and resolved rails specific cop

http://rubocop.readthedocs.io/en/latest/cops/#rails

app/models/candidate.rb

@@ -9,9 +9,9 @@ class Candidate < ApplicationRecord
 
   before_validation(:generate_test_hash, on: :create)
 
-  validates_presence_of :recruiter_id
-  validates_presence_of :name
-  validates_presence_of :experience
+  validates :recruiter_id, presence: true
+  validates :name, presence: true
+  validates :experience, presence: true
   validates :email, uniqueness: true, presence: true, email_format: true
   validates :test_hash, uniqueness: true, presence: true
 

app/models/user.rb

@@ -18,7 +18,7 @@ class User < ApplicationRecord
     def gen_reset_token
       loop do
         self[:reset_token] = SecureRandom.urlsafe_base64(10)
-        self[:reset_timestamp] = DateTime.now
+        self[:reset_timestamp] = DateTime.current
         break unless User.exists?(reset_token: self[:reset_token])
       end
     end