Rails - Oct 2008 - [Question] How to show models attributes' value in validation message?

Say I have a model with a validation in User model like this:


Class User < ActiveRecord::Base
  validates_uniqueness_of :name,
                          :message=>"user has already exist!"
end


As you can see, I want to write my own error message for this
validation.
And I get this error message in Controller like this:


Class Login < ActiveController::Base
  def create_user
    begin
      @user = User.new(:name=>params[:name])
      @user.save!
    rescue
      if @user.errors.blank?
        flash.now[:notice_err] = "Database error!"
      else
        temp = []
        @user.errors.each{|err| temmp << err[1]}
        flash.now[:notice_err] =
"<ul><li>"+temp.join("</li><li>")+"</
li></ul>"
      end
    else
      flash.now[:notice] = "<ul><li>User #{params[:name]}
created!</
li></ul>"
    end
  end
end


Everything goes on well for now.
However, if I want to show the ''error user name'' in the
validation
message like this


Class User < ActiveRecord::Base
  validates_uniqueness_of :name,
                          :message=>"user #{self.name} has already
exist!"
end


It cannot pass, and the following error shows out:

undefined method ''name'' in model


So my question is "How can I get the value of attributes in a model
validation helper?"
Are there anyone having any idea on this?
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Thank you for your reply.
I have tried two of what your suggested.

":message=>"user #{name} has already " shows "user has
already"
the #{name} will just be skipped though I had set a value in the model
object.

":message=>"user #{@name} has already" shows error message
"@name not
defined"

I will try this
:message=>"user #{attributes[:name]} has already
and I will tell you the result here.

Anyway, thank you.

On Oct 2, 3:42 pm, Pokkai Dokkai
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> boblu wrote:
> > Class User < ActiveRecord::Base
> >   validates_uniqueness_of :name,
> >                           :message=>"user #{self.name} has
already
> > exist!"
> > end
>
> > It cannot pass, and the following error shows out:
> > undefined method ''name'' in model
>
> :message=>"user #{name} has already
> or
> :message=>"user #{attributes[:name] || @name} has already
> or
> write your own validation method
> --
> Posted viahttp://www.ruby-forum.com/.
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