LISTSERV mailing list manager LISTSERV 16.5

Help for CODE4LIB Archives


CODE4LIB Archives

CODE4LIB Archives


CODE4LIB@LISTS.CLIR.ORG


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Proportional Font

LISTSERV Archives

LISTSERV Archives

CODE4LIB Home

CODE4LIB Home

CODE4LIB  September 2016

CODE4LIB September 2016

Subject:

Re: python for solr

From:

"Thomale, Jason" <[log in to unmask]>

Reply-To:

Code for Libraries <[log in to unmask]>

Date:

Thu, 1 Sep 2016 14:26:11 +0000

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (110 lines)

I built a Queryset class using pysolr that does this for one of my projects. It's not available as a standalone package, but the code is here:

https://github.com/unt-libraries/catalog-api/blob/master/django/sierra/utils/solr.py

Django-Haystack does this as well, but I'm not sure how usable Haystack is outside of Django. In fact, what I built here was an attempt to re-implement parts of Haystack's SearchQuerySet interface using something a bit more barebones. I found in this particular case Haystack was overkill for my needs and actually added quite a bit of overhead to Solr searches, but its interfaces are perfect for use in Django where you want to use Solr in place of Django models (e.g., using a Solr queryset in place of Django's QuerySets). I was able to shave a few hundred milliseconds off search requests this way. And since this is in context of a web API, that was important for me.

I guess it works about like you would think. After you instantiate a utils.solr.Queryset object (passing connection details, a page_by parameter, and the kwargs you want to send to Solr), you access individual results using the Queryset object like you would a list. Behind the scenes, it sends queries to Solr as needed to fetch the result (or results) you're accessing and caches the last result set. It only sends a query when you try to access a result outside the cached result set.

Some of the filters still need some work, and it *is* barebones--features like highlighting and faceting aren't implemented at all--but it works for what I use it for, and it shows how you might go about abstracting Solr paging logic with pysolr. (FWIW I haven't tried any of the other numerous Python modules for interacting with Solr so I'm not sure if others do something similar...)

Jason


> -----Original Message-----
> From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of
> Tod Olson
> Sent: Thursday, September 01, 2016 5:28 AM
> To: [log in to unmask]
> Subject: Re: [CODE4LIB] python for solr
> 
> Exactly! The question is whether there is a python solr library that
> provides a layer of abstraction over that paging logic.
> 
> -Tod
> 
> Sent from from the Šther.
> 
> > On Sep 1, 2016, at 04:59, Andrew Hankinson
> <[log in to unmask]> wrote:
> >
> > Solr itself has an internal limit to the number of results you can
> return on a single page (I think it is 1000) and AFAIK always returns a
> paged result. For speed and memory usage over large result sets it would
> probably be most efficient to build in paging logic.
> >
> >> On Aug 31, 2016, at 10:45 PM, Tod Olson <[log in to unmask]> wrote:
> >>
> >> On a related note, do any of the libraries allow the user to iterate
> over a large result set without having to be aware of repeated calls,
> incrementing the start parameter, and that sort of bookkeeping?
> >>
> >> It seems like someone must have built an iterator to hide that when
> you're trying to sift through a large number of hits.
> >>
> >> -Tod
> >>
> >>> On Aug 31, 2016, at 4:09 PM, Rhoads, Joseph
> <[log in to unmask]> wrote:
> >>>
> >>> I've used several of these.  I like the interface of mysolr but (as
> >>> mentioned) it hasn't been updated in a while.
> >>>
> >>> pysolr is fairly up to date (v3.5 came out in May this year), and is
> used
> >>> in django-haystack for the solr backend.
> >>> https://github.com/django-haystack/pysolr
> >>>
> >>> Haystack itself is great if you want an ORM-like interface for solr
> and use
> >>> django.
> >>> https://github.com/django-haystack/django-haystack
> >>>
> >>> -Joseph
> >>>
> >>>
> >>>
> >>>> On Wed, Aug 31, 2016 at 3:42 PM, Chris Gray <[log in to unmask]>
> wrote:
> >>>>
> >>>> I haven't done much of that but you can submit documents via the
> API and
> >>>> have them indexed (and processed by Tika).  Once you understand how
> to do
> >>>> that, you might find that you can do everything you want to do.
> >>>>
> >>>> An alternative would be reading the source of one of those
> libraries.  In
> >>>> the list you referenced, the only mention of inserting documents
> was for
> >>>> sunburnt.  I would be inclined to look there first, especially
> since it
> >>>> mentions a pythonic interface to Solr.
> >>>>
> >>>> A good, and amusing, cautionary tale about overwritten Python
> libraries is
> >>>> at https://www.youtube.com/watch?v=o9pEzgHorH0.
> >>>>
> >>>> Chris
> >>>>
> >>>>
> >>>>> On 2016-08-31 03:28 PM, Eric Lease Morgan wrote:
> >>>>>
> >>>>> On Aug 31, 2016, at 3:25 PM, Chris Gray <[log in to unmask]>
> wrote:
> >>>>>
> >>>>> Okay, there are SO many Python libraries [1] for Solr, and I'd
> like to
> >>>>>>> know which one is the most popular (not necessarily the "best").
> >>>>>> What do you want to do with it?
> >>>>>>
> >>>>>> I didn't feel the need to even look for a Python library for my
> needs.
> >>>>>> I use Python to submit searches to the Solr web API and consume
> the results
> >>>>>> as JSON.
> >>>>>
> >>>>> Good question. I want to add documents to a Solr index, and I want
> to
> >>>>> query the same index. Hmmm. -Eric M.
> >>

Top of Message | Previous Page | Permalink

Advanced Options


Options

Log In

Log In

Get Password

Get Password


Search Archives

Search Archives


Subscribe or Unsubscribe

Subscribe or Unsubscribe


Archives

February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008
November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007
July 2007
June 2007
May 2007
April 2007
March 2007
February 2007
January 2007
December 2006
November 2006
October 2006
September 2006
August 2006
July 2006
June 2006
May 2006
April 2006
March 2006
February 2006
January 2006
December 2005
November 2005
October 2005
September 2005
August 2005
July 2005
June 2005
May 2005
April 2005
March 2005
February 2005
January 2005
December 2004
November 2004
October 2004
September 2004
August 2004
July 2004
June 2004
May 2004
April 2004
March 2004
February 2004
January 2004
December 2003
November 2003

ATOM RSS1 RSS2



LISTS.CLIR.ORG

CataList Email List Search Powered by the LISTSERV Email List Manager