Bad Example

gistfile1.rb

# User Model
class User < ActiveRecord::Base
  attr_accessible :first_name, :last_name, :admin, :email
end

# Users Controller
class Users < ApplicationController
  def new
    @user = User.new
  end
  
  def create
    @user = User.new(params[:user])
    
    if @user.save
      redirect_to users_path, notice: "User Created!"
    else
      render :new
    end
  end
end

# User Form
<%= form_for @user do |f| %>
  <%= f.hidden_field :admin, value: true %>
  <p><%= f.email_field :email, placeholder: "Email Address" %></p>
  <p><%= f.text_field :first_name, placeholder: "First Name" %></p>
  <p><%= f.text_field :last_name, placeholder: "Last Name" %></p>
  <p><%= f.submit "Submit" %></p>
<% end %>