CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3ruby-on-rails-3.1heroku
notGeek
notGeek

Reputation: 1528

Undefined method `+' on Heroku RoR application

I'm developing a small application in Ruby-On-Rails. In a controller I have this piece of code:

@user = User.find(current_user.id)
@user.number = current_user.number + 1
@user.save!

Although it locally runs without problems, it crashes on Heroku at line two, with the following error:

NoMethodError (undefined method `+' for nil:NilClass)

Any tips on how to solve the problem?

Upvotes: 0

Views: 114

Answers (2)

Kashyap
Kashyap

Reputation: 4796

You can do this too:

@user.number = current_user ? current_user.to_i : 0
@user.save!

Upvotes: 1

Suborx
Suborx

Reputation: 3669

If you are storing the number as attribute in your database you should set the default state to 0.

create new migration and regenerate the number column.

def change
  remove_colum :users, :number
  add_column users, :number, :integer, :default => 0

  #ensure that all users with number == nil have got 0 instead nil 
  User.where(:number => nil).update_all(:number => 0)
end

Upvotes: 3

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