question about geocoder gem

I am using the gem 'geocoder'. I am trying to make an object that will fetch the latitude and longitude from ip address.

This is how my object's model looks like:

class 开发者_开发技巧Hey < ActiveRecord::Base

  geocoded_by :ip
  after_validation :geocode

  def ip
    return request.ip
  end

end

When I create an object I get this error:

NoMethodError (undefined method `request'for #<Hey:0x7f268f47dd00>):

if I change the method ip to:

  def ip
    return "24.193.83.1"
  end

it works. Why does request.ip doesn't work in the model ? request.ip works for me in the controller.

How can I fix this?

Thanks,

Oded

This is how I solved it.

the model:

class Hey < ActiveRecord::Base

      attr_accessor :ip_address

      geocoded_by :ip_address
      after_validation :geocode

    end

controller:

class HeysController < ApplicationController

 def create
        hey = Hey.new
        hey.ip_address = request.ip
        hey.save

        redirect_to :action => "index"
      end

 end

You also need to store ip of this object. Fill ip_address with request.ip when create new object. Than code in the model will looks like:

geocoded_by :ip_address,
  :latitude => :lat, :longitude => :lon #this is also fields in the db
after_validation :geocode

or something like that.