class CreateUsers < ActiveRecord::Migration
  def self.up
    create_table :users do |t|
      t.string :username
      t.string :password
      t.string :security_number
    end
  end
  def self.down
    drop_table :users
  end
end

<%= form_for(@user) do |f| %>
  <% if @user.errors.any? %>
<div id="error_explanation">
  <h2><%= pluralize(@user.errors.count, "error") %> prohibited this user from being saved:</h2>

  <ul>
  <% @user.errors.full_messages.each do |message| %>
    <li><%= message %></li>
  <% end %>
  </ul>
</div>
 <% end %>

  <div class="actions">
    <%= f.submit %>
  </div>
    <% end %>

<div class="field">
  <%= f.label :name %>
  <%= f.text_field :name %>
</div>