# More\_like\_this not working? **URL:** \ **Category:** Ferret\ **Created:** [December 1, 2006, 10:46am UTC](https://www.ruby-forum.com/t/more-like-this-not-working/77890 "2006-12-01T10:46:23Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![corne](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/f04885/32.png) [@corne](https://www.ruby-forum.com/u/corne)\ **Post date:** [December 1, 2006, 10:46am UTC](https://www.ruby-forum.com/t/more-like-this-not-working/77890/1 "2006-12-01T10:46:23Z")
Hi all, using ferret 0.10.13 and aaf trunk, i cannot get more\_like\_this to work. I read other posts on this forum related to that, but that did not solve it. I have a model Question with a field question\_text. I do: * * * > > q = Question.find(:first) > > q.more\_like\_this > > NoMethodError: You have a nil object when you didn’t expect it! > > You might have expected an instance of Array. > > The error occured while evaluating nil.each > > from > > ./script/…/config/…/config/…/vendor/plugins/acts\_as\_ferret/lib/more\_like\_this.rb:110:in > > `retrieve_terms' from ./script/../config/../config/../vendor/plugins/acts_as_ferret/lib/more_like_this.rb:65:in`more\_like\_this’ > > from /usr/lib/ruby/1.8/monitor.rb:229:in `synchronize' from ./script/../config/../config/../vendor/plugins/acts_as_ferret/lib/more_like_this.rb:61:in`more\_like\_this’ > > from (irb):8 > > > q.more\_like\_this > > NoMethodError: You have a nil object when you didn’t expect it! > > You might have expected an instance of Array. > > The error occured while evaluating nil.each > > from > > ./script/…/config/…/config/…/vendor/plugins/acts\_as\_ferret/lib/more\_like\_this.rb:110:in > > `retrieve_terms' from ./script/../config/../config/../vendor/plugins/acts_as_ferret/lib/more_like_this.rb:65:in`more\_like\_this’ > > from /usr/lib/ruby/1.8/monitor.rb:229:in `synchronize' from ./script/../config/../config/../vendor/plugins/acts_as_ferret/lib/more_like_this.rb:61:in`more\_like\_this’ > > from (irb):9 > > q.more\_like\_this(:fields =\> [:question\_text]) > > NoMethodError: You have a nil object when you didn’t expect it! > > You might have expected an instance of Array. > > The error occured while evaluating nil.each > > from > > ./script/…/config/…/config/…/vendor/plugins/acts\_as\_ferret/lib/more\_like\_this.rb:110:in > > `retrieve_terms' from ./script/../config/../config/../vendor/plugins/acts_as_ferret/lib/more_like_this.rb:65:in`more\_like\_this’ > > from /usr/lib/ruby/1.8/monitor.rb:229:in `synchronize' from ./script/../config/../config/../vendor/plugins/acts_as_ferret/lib/more_like_this.rb:61:in`more\_like\_this’ > > from (irb):8 * * * Am I doing something wrong or is this a bug? ---
**Author:** ![corne](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/f04885/32.png) [@corne](https://www.ruby-forum.com/u/corne)\ **Post date:** [December 1, 2006, 11:33am UTC](https://www.ruby-forum.com/t/more-like-this-not-working/77890/2 "2006-12-01T11:33:21Z")
On Fri, Dec 01, 2006 at 10:46:23AM +0100, Corné Verbruggen wrote: > > > q.more\_like\_this you’ll have to give an array of field names to use for the similarity search: q.more\_like\_this :field\_names =\> [:question\_text] Jens – webit! Gesellschaft für neue Medien mbH [www.webit.de](http://www.webit.de) Dipl.-Wirtschaftsingenieur Jens Krämer removed\_email\_address@domain.invalid Schnorrstraße 76 Tel +49 351 46766 0 D-01069 Dresden Fax +49 351 46766 66 ---
**Author:** ![corne](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/f04885/32.png) [@corne](https://www.ruby-forum.com/u/corne)\ **Post date:** [December 1, 2006, 11:52am UTC](https://www.ruby-forum.com/t/more-like-this-not-working/77890/3 "2006-12-01T11:52:16Z")
Jens K. wrote: > On Fri, Dec 01, 2006 at 10:46:23AM +0100, Corn� Verbruggen wrote: > > > > > q.more\_like\_this > > you’ll have to give an array of field names to use for the similarity > search: > > q.more\_like\_this :field\_names =\> [:question\_text] > > Jens Thanks!