admin_users_controller.rb

  def update
    find_user
    if @user.update_attributes(user_params)
      respond_to do |format|
        format.html {
          redirect_to admin_user_path(@user)
          flash[:notice] = 'User updated'
        }

        format.js {
        }
      end
    else
      render :edit
      flash[:notice] = 'User not updated'
    end
  end

show,html.haml

  #contract-start.row{style: @user.approved ? '' : 'display:none'}
    .col-md-12
      %table.table.table-condensed
        %thead
          %tr.text-uppercase
            %th{:colspan => "4"}
              contract information
        %tbody
          %tr
            %td.text-left
              Pro bono
            %td.text-right
              %ul.list-inline.nomb
                %li
                  = form_for([:admin, @user], remote: true) do |f|
                    = hidden_field(:user, :pro_bono, value: true)
                    = f.button(class: "nob noba nolp norp", id: "approve-pro-bono") do
                      %i.glyphicon.glyphicon-ok.ml10.flat-green
                %li
                  = form_for([:admin, @user], remote: true) do |f|
                    = hidden_field(:user, :pro_bono, value: false)
                    = f.button(class: "nob noba nolp norp", id: "approve-pro-bono") do
                      %i.glyphicon.glyphicon-remove.ml10.flat-red

update.js.haml

- if params["user"]["approved"]
  $("#contract-start").fadeIn();
  console.log("hello")

- if params["user"]["pro_bono"]["t"]
  $(".is-pro-bono").fadeIn();

- if params["user"]["pro_bono"]["f"]
  $(".is-pro-bono").fadeOut();

- if params["user"]["office_location"]
  $("#office_location").fadeIn();