Problems with file_column and rmagick

Rails
1

i have installed file_column plugin and rmagick.

i have a model:

class Core < ActiveRecord::Base
has_one :forum_topic
has_many :votes
has_many :forum_messages ,:through => :forum_topic
attr_accessible :site,:descriptionm,:image
file_column :image
…

and in form i have:

USERNAME*: <%= text_field "user", "name", "size" => 25, "maxlength" => 25 %> ICONA: (.jpg,.gif,.png) <%= file_column_field "core", "image" %>

and in action of form i have:

@user=User.create(params[:user])
if params[:regions]
  @regions=Region.find(params[:regions])
  @user.regions=@regions
end
if @user.save
  @user.image=params[:core][:image]
  @user.save

So it works. the file is uploaded correctly and the record is saved in
db.

If i edit model so:

class Core < ActiveRecord::Base
has_one :forum_topic
has_many :votes
has_many :forum_messages ,:through => :forum_topic
attr_accessible :site,:descriptionm,:image
file_column :image, :magick => {
:geometry => “400x400”,
:versions =>
{
:small => {:crop => “1:1”, :size =>
“62×62!” },
:thumb => {:crop => “1:1”, :size =>
“30×30!” },
:medium => { :size => “600×600” }
}

I receive this error:
Trying to access file_column, but primary key got lost.

The error is at the istruction:
@user=User.create(params[:user])

Why? How i can do?

Thanks

2

The problem is that validation is make after the resize with magick
is possible make it before resize?
Thanks