app/views/users/_form.html.erb
<%= bootstrap_form_for(@user, html: { multipart: true }) do |f| %>
<%= f.text_field :phone_number %>
<%= f.collection_select(:cities, City.all, :id, :name, {:prompt => "Please Select a Sector"}, {:multiple => true}) %>
<%= f.file_field :vehicle_photo, label: "Vehicle Photo (optional)" %>
<%= f.date_field :uber_start_date, label: "When did you start driving for Uber?" %>
<%= f.number_field :avg_weekly_rides, label: "Average Weekly Rides" %>
<h5>We will automatically update the rest of your info when you change it with Uber</h5>
<%= f.submit "Submit" %>
<% end %>