How to put google map on the page
class UsersController < ApplicationController
def show
        if !current_user then

        redirect_to({:controller => "users", :action => "new"}, :notice => 'You need register before reading the profile')
        return

    end
    @user = User.find(params[:id])
    @json = @user.to_gmaps4rails
    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @user }
    end
>  end

class User < ActiveRecord::Base
    acts_as_authentic
    acts_as_gmappable
 validates_presence_of :country, :city, :street, :message => 'must be filled'
   has_many :propose

    def gmaps4rails_address
    address
    #describe how to retrieve the address from your model, if you use directly a db column, you can dry your code, see wiki
      #"#{self.street}, #{self.city}, #{self.country}"
    end
end

<%= @user.name %>
<%= @user.email %>

<%= gmaps4rails(@json) %>
<%= yield :scripts %>
<%= render 'layouts/comment' %>