Hello.
I’m trying to make my site work with OAI-PMH (http://
oai.rubyforge.org/). Whilst running the tests on 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 works fine, but
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
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
and here is one with a valid third parameter:
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)
Katipo Communications, Ltd. (http://katipo.co.nz)
http://twitter.com/wtem
On Sun, Jan 10, 2010 at 9:35 PM, Walter McGinnis
[email protected] 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.
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/
Cheers,
Walter
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/
Here’s a valid URL query string, for example:
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
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. 
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/
Ok, thanks! Will do so straight away
best of all,
Szymon
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/
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)