Rails - May 2010 - Transaction Failures

Hey,

I''ve got a multiple model (4) form on my site.

I have the controller handling the creation with a transaction. I do
this because if one object can''t save I don''t want any of them
saved
and need to be able to quit the entire transaction without making any
permanent db calls.

The problem I find is. If a validation fails on an object without the
transaction present. The page refreshes with rails generated
validation errors. With the transaction present I don''t know how to
send it back to the page with errors present. But again without the
transaction if there is a problem all good objects get saved to the db
and the bad one does not.

So the problem is: If the transaction fails. I need the form page to
load with validation errors.

I use the code below:

  def create
    begin
      ActiveRecord::Base.transaction do
        @dealer = Dealer.new(params[:dealer])
        @dealer.save!
        @user = @dealer.users.build(params[:user])
        @user.role_id = 3
        @dealer.addresses.build(params[:mailing_address])
       #@dealer.addresses.create(params[:billing_address])
      end
    rescue ActiveRecord::RecordInvalid => invalid
      flash[:notice] = "Vehicle was not created"
      @dealer = Dealer.new
      @user = User.new
      render :action => "new"
    end

    if ! @dealer.new_record?
      flash[:notice] = "Dealer, User and addresses saved!"
      redirect_back_or_default login_path
    end
  end

cheers.

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Found my problem immediately after posting.

In:

rescue ActiveRecord::RecordInvalid => invalid
      flash[:notice] = "Vehicle was not created"
      @dealer = Dealer.new
      @user = User.new
      render :action => "new"
end

Should be:

rescue ActiveRecord::RecordInvalid => invalid
      flash[:notice] = "Vehicle was not created"
      render :action => "new"
end

Creating new objects seems to get blank all the fields. As well I was
missing separate   <%= f.error_messages %> for each model type.

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