It might help to have the models for auction and user... also, I like to 
add the annotate gem which gives some header comments in all my models to 
show what fields etc are there.  Very helpful info and references.

you already know that the validate needs to be validates...

is this an active system or SUD?  do you have a solid development database 
that is well populated to test/develop against?

this link may help 
some:  
http://guides.rubyonrails.org/active_record_validations.html#custom-methods

other than that I'd have to see it in action to debug further. 

Good luck

Max

On Monday, March 26, 2018 at 6:17:56 PM UTC-6, fugee ohu wrote:
>
> This model has some errors that I wasn't able to get sorted out the two 
> lines that begin with validate should be validates but after that I don't 
> understand what the author's trying to do If I change them to validates I 
> get the error Unknown validator: 'MessageValidator' for   validate 
> :auction_active?, message: :auction_active
>
>
> class Bid < ActiveRecord::Base
>   belongs_to :auction
>   belongs_to :user
>
>   validates :auction, :user, presence: true
>   validate :auction_active?, message: :auction_active
>   validate :last_user_different?
>
>   scope :sorted, -> { order(:created_at) }
>
>   after_create :update_auction
>
>   private
>
>   def auction_active?
>     if auction && !auction.active?
>       if auction.finished?
>         errors.add(:auction, :finished)
>       else
>         errors.add(:auction, :not_started)
>       end
>     end
>   end
>
>   def last_user_different?
>     if auction && user
>       errors.add(:user, :same_user_twice) if auction.last_user == user
>     end
>   end
>
>   def update_auction
>     auction.increase_price_and_time
>     auction.publish_updates
>   end
> end
>
>

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