Rails 3: Handle ActiveRecord::RecordNotUnique Exception

Question

How can I handle ActiveRecord::RecordNotUnique exception in the controller? Thanks

Edit: I\'m getting that exception when generating an

Answer 1

Using this validation method validate_uniqueness_of does not guarantee the absence of duplicate record insertions.

You should look here

Answer 2

You can add a uniqueness validation and still have a chance to change the code without having to use rescue.

couponcode.rb

validates_uniqueness_of :code

controller:

@couponcode = Couponcode.new(:user_id => current_user.id)
begin
  couponcode.code = generate_code
  # might want to break out after a limit here
end until @couponcode.valid?
@couponcode.save

But you could also use a uuid and it would be unique without a check.

Answer 3

begin
  # do stuff
rescue ActiveRecord::RecordNotUnique
  # handle the exception however you want to
end

http://ruby-doc.org/docs/ProgrammingRuby/html/tut_exceptions.html

You could also use rescue_from if it's something you need to deal with often.