# OAI-PMH problem with more than one parameter **URL:** \ **Category:** Rails\ **Created:** [January 9, 2010, 1:48pm UTC](https://www.ruby-forum.com/t/oai-pmh-problem-with-more-than-one-parameter/181314 "2010-01-09T13:48:19Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![szymonides](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/43a26b/32.png) [@szymonides](https://www.ruby-forum.com/u/szymonides)\ **Post date:** [January 9, 2010, 1:48pm UTC](https://www.ruby-forum.com/t/oai-pmh-problem-with-more-than-one-parameter/181314/1 "2010-01-09T13:48:19Z")
Hello. I’m trying to make my site work with OAI-PMH (http:// [oai.rubyforge.org/](http://oai.rubyforge.org/)). Whilst running the tests on [http://re.cs.uct.ac.za/](http://re.cs.uct.ac.za/) it seems that it can’t process more than two parameters. For example: [http://mysite.com/oai?verb=Identify](http://mysite.com/oai?verb=Identify) works fine, but [http://mysite.com/oai?verb=Identify&test=tes](http://mysite.com/oai?verb=Identify&test=tes) end ups with an error with any second parameter Processing OaiController#index (for 0.0.0.0:3030 at 2010-01-09 00:47:21) [GET] Parameters: {“verb”=\>“Identify”, “test”=\>“tes”} TypeError (can’t convert nil into Array): oai (0.0.12) lib/oai/provider/response.rb:67:in `-' oai (0.0.12) lib/oai/provider/response.rb:67:in `valid?’ oai (0.0.12) lib/oai/provider/response.rb:31:in `initialize’ … Line 67 is: return false unless (@options.keys - self.class.valid\_options).empty? where, ofcourse, self.class.valid\_options is nil. But why? Any thoughts? – szymszy ---
**Author:** ![szymonides](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/43a26b/32.png) [@szymonides](https://www.ruby-forum.com/u/szymonides)\ **Post date:** [January 10, 2010, 9:37am UTC](https://www.ruby-forum.com/t/oai-pmh-problem-with-more-than-one-parameter/181314/2 "2010-01-10T09:37:05Z")
Hi, As you know the OAI-PMH standard is pretty specific about what are acceptable parameters to requests and “test” is definitely not one. I have a pretty customized version of the OAI lib running on the Kete project and though it answers properly formed requests correctly it gives a 500 error when passed “&test=test”, too. You seem to indicate that you have tried other second parameters, but are they definitely valid. Here’s a valid URL query string, for example: [http://yoursite.com/oai?verb=ListRecords&from=2010-01-01](http://yoursite.com/oai?verb=ListRecords&from=2010-01-01) and here is one with a valid third parameter: [http://yoursite.com/oai?verb=ListRecords&from=2009-12-01&until=2010-01-01](http://yoursite.com/oai?verb=ListRecords&from=2009-12-01&until=2010-01-01) You may get “no records match” type message, but it should be a well formed XML response. Hopefully it is just a matter of testing with valid parameters and things will come right. At the least it is good to narrow down your issue. ## Cheers, Walter Walter McGinnis Kete Project Lead ([http://kete.net.nz](http://kete.net.nz)) Katipo Communications, Ltd. ([http://katipo.co.nz](http://katipo.co.nz)) [http://twitter.com/wtem](http://twitter.com/wtem) ---
**Author:** ![szymonides](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/43a26b/32.png) [@szymonides](https://www.ruby-forum.com/u/szymonides)\ **Post date:** [January 10, 2010, 9:38am UTC](https://www.ruby-forum.com/t/oai-pmh-problem-with-more-than-one-parameter/181314/3 "2010-01-10T09:38:51Z")
On Sun, Jan 10, 2010 at 9:35 PM, Walter McGinnis [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > You seem to indicate that you have tried other second parameters, but > are they definitely valid. Sheesh, wish I had used “valid” grammar. Oops. ---
**Author:** ![szymonides](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/43a26b/32.png) [@szymonides](https://www.ruby-forum.com/u/szymonides)\ **Post date:** [January 20, 2010, 12:07am UTC](https://www.ruby-forum.com/t/oai-pmh-problem-with-more-than-one-parameter/181314/4 "2010-01-20T00:07:37Z")
Yeah, wish I could be of more help, but I don’t use the ActiveRecord wrapper with the OAI gem. I use another one that ties directly into my search engine. I recommend trying to contact Terry Reese (one of the gem’s contributors). Here’s his blog, he’s helped me in the past: [http://people.oregonstate.edu/~reeset/blog/](http://people.oregonstate.edu/~reeset/blog/) Cheers, Walter ---
**Author:** ![szymonides](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/43a26b/32.png) [@szymonides](https://www.ruby-forum.com/u/szymonides)\ **Post date:** [January 19, 2010, 3:22pm UTC](https://www.ruby-forum.com/t/oai-pmh-problem-with-more-than-one-parameter/181314/5 "2010-01-19T15:22:29Z")
Hi, > You seem to indicate that you have tried other second parameters, but > are they definitely valid. Pretty sure. I used the tests from [http://re.cs.uct.ac.za/](http://re.cs.uct.ac.za/) > Here’s a valid URL query string, for example: > > [http://yoursite.com/oai?verb=ListRecords&from=2010-01-01](http://yoursite.com/oai?verb=ListRecords&from=2010-01-01) > > and here is one with a valid third parameter: > > [http://yoursite.com/oai?verb=ListRecords&from=2009-12-01&until=2010-01-01](http://yoursite.com/oai?verb=ListRecords&from=2009-12-01&until=2010-01-01) Unfortunatly your examples don’t work either. I get this error: Processing OaiController#index (for 0.0.0.0 at 2010-01-19 14:15:44) [GET] Parameters: {“verb”=\>“ListRecords”, “from”=\>“2010-01-01”} NoMethodError (private method `gsub!' called for Fri Jan 01 00:00:00 UTC 2010:Time): /usr/lib/ruby/1.8/date/format.rb:1061:in `\_parse’ /usr/lib/ruby/1.8/time.rb:240:in `parse' oai (0.0.12) lib/oai/provider/model/activerecord_wrapper.rb:123:in `sql\_conditions’ oai (0.0.12) lib/oai/provider/model/activerecord\_wrapper.rb:46:in `find' oai (0.0.12) lib/oai/provider/response/list_records.rb:6:in `to\_xml’ oai (0.0.12) lib/oai/provider.rb:260:in `list_records' oai (0.0.12) lib/oai/provider.rb:286:in `send’ oai (0.0.12) lib/oai/provider.rb:286:in `process_request' app/controllers/oai_controller.rb:6:in `index’ /usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service’ … Rendering /srv/mysite/rails/public/500.html (500 Internal Server Error) Even funnier is that the same link in the dev mode gives: Processing OaiController#index (for 127.0.0.1 at 2010-01-19 15:20:18) [GET] Parameters: {“verb”=\>“ListRecords”, “from”=\>“2010-01-01”} TypeError (can’t dup NilClass): oai (0.0.12) lib/oai/provider/model/activerecord\_wrapper.rb:34:in `latest' oai (0.0.12) lib/oai/provider/response/record_response.rb:7:in `inherited’ oai (0.0.12) lib/oai/provider/response.rb:73:in `call' oai (0.0.12) lib/oai/provider/response.rb:73:in `populate\_defaults’ oai (0.0.12) lib/oai/provider/response.rb:72:in `each' oai (0.0.12) lib/oai/provider/response.rb:72:in `populate\_defaults’ oai (0.0.12) lib/oai/provider/response.rb:68:in `valid?' oai (0.0.12) lib/oai/provider/response.rb:31:in `initialize’ oai (0.0.12) lib/oai/provider.rb:260:in `new' oai (0.0.12) lib/oai/provider.rb:260:in `list\_records’ oai (0.0.12) lib/oai/provider.rb:286:in `send' oai (0.0.12) lib/oai/provider.rb:286:in `process\_request’ app/controllers/oai\_controller.rb:6:in `index' /usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service’ … Really have no idea what’s going on here. ☹ ---
**Author:** ![szymonides](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/43a26b/32.png) [@szymonides](https://www.ruby-forum.com/u/szymonides)\ **Post date:** [January 20, 2010, 12:49am UTC](https://www.ruby-forum.com/t/oai-pmh-problem-with-more-than-one-parameter/181314/6 "2010-01-20T00:49:13Z")
Walter McGinnis wrote: > Yeah, wish I could be of more help, but I don’t use the ActiveRecord > wrapper with the OAI gem. I use another one that ties directly into > my search engine. It is very strange to me. Seem that the problem is with parsing the date. NoMethodError (private method `gsub!' called for Fri Jan 01 00:00:00 UTC 2010:Time): /usr/lib/ruby/1.8/date/format.rb:1061:in `\_parse’ > I recommend trying to contact Terry Reese (one of the gem’s > contributors). Here’s his blog, he’s helped me in the past: > > [http://people.oregonstate.edu/~reeset/blog/](http://people.oregonstate.edu/~reeset/blog/) Ok, thanks! Will do so straight away best of all, Szymon ---
**Author:** ![szymonides](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/43a26b/32.png) [@szymonides](https://www.ruby-forum.com/u/szymonides)\ **Post date:** [June 30, 2010, 5:29am UTC](https://www.ruby-forum.com/t/oai-pmh-problem-with-more-than-one-parameter/181314/7 "2010-06-30T05:29:15Z")
Szymon Maka wrote: > Walter McGinnis wrote: > > > Yeah, wish I could be of more help, but I don’t use the ActiveRecord > > wrapper with the OAI gem. I use another one that ties directly into > > my search engine. > > It is very strange to me. Seem that the problem is with parsing the > date. > > NoMethodError (private method `gsub!' called for Fri Jan 01 00:00:00 UTC 2010:Time): /usr/lib/ruby/1.8/date/format.rb:1061:in `\_parse’ > > > I recommend trying to contact Terry Reese (one of the gem’s > > contributors). Here’s his blog, he’s helped me in the past: > > > > [http://people.oregonstate.edu/~reeset/blog/](http://people.oregonstate.edu/~reeset/blog/) > > Ok, thanks! Will do so straight away > > best of all, > Szymon The problem here is that the parameter is not a string Time.parse(“2010-06-27 13:44:11”) works Time.parse(myDateTimeObject) throws this error TypeError ($\_ value need to be String (nil given)): /usr/lib/ruby/1.8/date/format.rb:1061:in `_parse' /usr/lib/ruby/1.8/time.rb:240:in `parse’ Make sure you do Time.parse(myDateTimeObject.to\_s)