add refineSearch

src/sodb.coffee

@@ -86,14 +86,38 @@ module.exports =
     # Only called if the cache needs a new value.
     #
     findResults: (search) ->
-      results = @objects
+      results = @runSearch(@objects, search)
 
+      return results.map @unref
+
+    #
+    # runSearch(results, search)
+    #
+    # results - the array of objects to search
+    # search - array of search objects
+    #
+    runSearch: (results, search) ->
       for condition in search
         field = Object.keys(condition)[0]
         compare = Object.keys(condition[field])[0]
         results = @runCondition(field, compare, condition[field][compare], results)
 
-      return results.map @unref
+      return results
+
+    #
+    # refineSearch(results, search...)
+    #
+    # results - results from a previous sodb query
+    # search... - search objects
+    #
+    refineSearch: ->
+      args = Array.prototype.slice.call(arguments)
+      results = args.shift()
+      search = args.map(@expandQuery)
+
+      refined = @runSearch(results, @expandQuery(search))
+
+      return refined.map @unref
 
     #
     # findOne(search...)

tests/sodb-tests.coffee

@@ -156,6 +156,15 @@ for caching in [true, false]
         it 'should have a dbrevision of not 0', ->
           expect(db.dbRevision).not.to.equal 0
 
+    describe 'Results', ->
+      it 'should let you refine your results', ->
+        results = db.where({eyes: 2})
+
+        res = db.refineSearch(results, {age: 20})
+
+        expect(res.length).to.equal 1
+
+
 describe 'JSON', ->
   [db, json] = []