问题
I am facing the problem of sort Lucene results based on user click log. I would like that more accessed results comes first. Does anyone knows how to configure or implement such property in Lucene or Solr?
Thank you very much.
回答1:
You can declare a sortable integer field (let's call it clickNum) in your schema, setting it to zero by default for each indexed document. When a user opens a document your app triggers an update of clickNum field by setting clickNum = clickNum + 1.
At query-side you can set a muptiple sorting based on your primary sort parameter (if any) and clickNum:
sort=<field name>+<direction>[,clickNum+desc]
You can avoid document update by storing your click log in an external database and reordering your results with post-query elaboration, but IMHO that's not a good option.
回答2:
Using Dismax could be a good option. The bf (Boost Functions) parameter of Dismax could be set to boost the documents with a high click count.
If you don't want to use Dismax, you can also use a function query in the bf (Boost Functions) parameter.
来源：https://stackoverflow.com/questions/2944158/solr-lucene-user-click-based-ranking