Question

I am having trouble with datamapper not updating a model. I can create and save models without issue. I have enabled raise_on_save_failure and checked the return value of update but see no errors.

Here is the model:

class UserProfile   
  include DataMapper::Resource  
  attr_accessor :id, :wants_hints, :is_beta_user  
  property :id, Serial #auto-increment integer key  
  property :is_beta_user, Boolean  
  property :wants_hints, Boolean  
  has 1, :user, :through => Resource 
end 

And here is where it is updated in the controller:

if user = User.get(request.session[:user])      
  if request.params[:user_profile]        
    beta = request.params[:user_profile].has_key?('is_beta_user')        
    hints = request.params[:user_profile].has_key?('wants_hints')        
    user.user_profile.update({:is_beta_user => beta, :wants_hints => hints}) # returns true
    Log.puts user.user_profile.errors.each {|e| Log.puts e.to_s} # returns empty list []
  end    
end

When the controller is called update always returns true, and there are never errors in the error list. The datamapper log, which is set to :debug, only shows the SELECT queries for retrieving the user and user_profile and that is all. Why would I be able to save a newly created model, but not be allowed to update that same model?

Answer 1

Removing attr_accessor fixed the problem. From my research attr_accessor is used for attributes not in the database.