Appache solr results multi sites search sorting based on specific feild i have four sites and use appache solr module to execute search indexing in these four sites ,
all is ok with me , but the results sort not as i want 

i want to sort by fields ......for ex:- get all result that have [field 1] first , then get all results that have [ field 2] ....

in my case , i have some results from [ field 1] then [ field 2] then [field 1] , ....
for note (my field type is taxonomy term and all contents in all four sites are the same )

Thanks
A quick Solution may be to use Apache Solr Sort Module.


  Per environment setting of grouping per content type/taxonomy/field
  value/... Allow for a custom amount of items per group (global)


But the best way is to setup a Apache Solr View :

Search API, has a Solr integration module, which will allow you to setup a View with exposed filters and full text search. With the flexibility of Views, you should be able to setup the view to allow the users to sort as they wish.