Try using a custom value source parser and pass the "formula" of computing the price to solr; something like this http://java.dzone.com/articles/connecting-redis-solr-boosting
On Mon, Sep 22, 2014 at 1:38 AM, Scott Smith <ssm...@mainstreamdata.com> wrote: > There are likely several hundred groups. Also, new groups will be added > and some groups will be deleted. So, I don't think putting a field in the > docs works. Having to add a new group price into 100 million+ documents > doesn't seem reasonable. > > Right now I'm looking at > http://sujitpal.blogspot.com/2011/05/custom-sorting-in-solr-using-external.html. > This reference a much older version of solr (the blog is from 2011) and so > I will need to update the classes referenced. > > -----Original Message----- > From: Erick Erickson [mailto:erickerick...@gmail.com] > Sent: Saturday, September 20, 2014 11:58 AM > To: solr-user@lucene.apache.org > Subject: Re: Help on custom sort > > How many different groups are there? And can user A ever be part of more > than one group? > If > 1> there are a reasonably small number of groups (< 100 or so as a > place to start) > and > 2> a user is always part of a single group > > then you could store separate prices in each document by group, thus you'd > have some fields like > price_group_a: $100 > price_group_b: $101 > > then sorting becomes trivial, you just specify a sort_group_a for users > in group A etc. If the number of groups is unknown-but-not-huge dynamic > fields could be used. > > If that's not the case, then you might be able to get clever with sorting > by function, here's a place to start: > https://cwiki.apache.org/confluence/display/solr/Function+Queries > > These can be arbitrarily complex, but I'm thinking something where the > price returned by the function respects the group the user is in, perhaps > even the min/max of all the groups the user is in. I admit I haven't really > thought that through well though... > > Best, > Erick > > On Sat, Sep 20, 2014 at 9:26 AM, Scott Smith <ssm...@mainstreamdata.com> > wrote: > > I need to provide a custom sort option for sorting by price and I would > like some suggestions. It's not the straightforward "just sort by a price > field in the document" scenario or I wouldn't be asking for help. Here's > the scenario I'm dealing with. > > > > I have 100 million+ documents (so multi-sharded). Users search for > documents they are interested in using a standard keyword search. They > then purchase documents they are interested in. So far, nothing hard. > > > > Here's where things get "interesting". The documents come from multiple > suppliers. Each supplier sets a price for his documents and different > suppliers will provide different pricing. > > > > That wouldn't be difficult except that *users* are divided up into > different groups and depending on which group they are in, the supplier > will charge the user a different price. So, user A may pay one price for a > document and user B may pay a different price for the same document just > because user A and user B are in different groups. I don't even know if > the relative order or pricing is the same between different groups (e.g., > if document X is more expensive than document Y for a user in group M, it > may not be more expensive for a user in group N). The one thing that may > make this doable is that supplier A will likely have the same price for all > of his documents for each of the user groups. So, a user in group A will > pay the same price regardless of which document he buys from supplier 1. A > user in group B will also pay the same price for any document from supplier > 1; it's just that a user in group B will likely pay a different price than > a user in group A. So, within a supplier, the price varies based on user > group, not the document. > > > > To summarize, one of the requirements for the system is that we provide > the ability to sort search results based on price. This would be easy > except that the price a user pays not only depends on what he wants to buy, > but on what group the he is in. > > > > I suspect there is some kind of custom solr module I'm going to have to > write. I'm thinking that the user group gets passed in as a custom solr > parameter (I'm assuming that's possible??). Then I'm thinking that there > has to be some kind of in memory database that tracks pricing based on user > group and document supplier). > > > > I'm happy to go read code, documents, links, etc if someone can point me > in the right direction. What kind of solr module am I likely going to > write (extend) and are there some examples somewhere? Maybe there's a way > to do this without having to extend a solr module?? > > > > Hope this makes sense. Any help is appreciated. > > > > Scott > > > > > -- Thanks & Regards, Apoorva
