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[EP-tech] Re: problem with DB query for view
- To: eprints-tech@ecs.soton.ac.uk
- Subject: [EP-tech] Re: problem with DB query for view
- From: Gilles Fournié <gilles.fournie@cirad.fr>
- Date: Mon, 22 Dec 2014 09:23:55 +0100
Sorry..
I have not been clear.
The wiki shows allow_null under "menus ".
Yours is outside.
I don't know if it could make a difference or not...
Regards
HI,
Did you try adding "allow_null => 0" to your view ?
I'm not sure which is the default value :
http://wiki.eprints.org/w/Views.pl#Menu_options
Regards,
GFHi folks,
We have two multiple compound fields: “creators” and “editors”, with subfields:
· name (type=name)
· id (type=text)
· … etc.
The ids are sparsely assigned (used to identify contributors associated with our institution.)
We also have a view “person”, with a single menu:
allow_null => 0,
menus => [{fields => [ "creators_id", "editors_id" ],
new_column_at => [1, 1],
mode => "sections",
open_first_section => 1,
group_range_function => "EPrints::Update::Views::cluster_ranges_30",
grouping_function => "EPrints::Update::Views::group_by_a_to_z",
}],
The problem is that, since upgrading from 3.2 to 3.3, the view includes a subset of those creators/editors who don’t have an id.
I tracked through the code and found that it’s generating the correct UNION statement (effectively: select from eprint_creators_id where creators_id!='' UNION select from eprint_editors_id where editors_id!=''), however for each field it’s then wrapping the union in a distinctby (select creators_id from (UNION); select editors_id from (UNION)). Of course, the union returns everything with either a creators_id or an editors_id, so both of those distinctby queries includes some null ids. Thus, the first section in the view menu is “?” with a link to the user “NULL.html” who has several thousand EPrints.
This is a bug, but I’m not quite sure how to turn it into a bug report on github. In the meantime, has anybody else come across this sort of issue? Are there any known fixes or workarounds? I have a potential hack ready to get us by, but I’d prefer something a bit less klugey.
Cheers
--
Matthew Kerwin | Senior Web Developer | Applications & Development Team | Library eServices | Queensland University of Technology | Level 3, R Block, Kelvin Grove | matthew.kerwin@qut.edu.au | CRICOS No 00213J
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- [EP-tech] Re: problem with DB query for view
- From: Gilles FOURNIE <gilles.fournie@cirad.fr>
- [EP-tech] Re: problem with DB query for view
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