title: Why can't I check ActiveRecord validations in the console?
body: <p>I'm learning RoR at the moment, and I think I must be misunderstanding something. </p>
  
  <p>I have an ActiveRecord class call User, with simple validations on :name and :email such as presence: true, length: { maximum: 15 }, etc. I thought I'd check the validations in the console. I go into rails console (development env), and create a new instance with a name that is too long, such as
  user_instance = User.new (name:"aaaaabbbbbcccccddddd", email:""). </p>
  
  <p>The validation doesn't throw up any errors. When I try user_instance.save, the record won't write to the DB, so it's obviously working fine at that stage. What am I doing wrong?</p>