include? bug fix for multiple rels to the same object

lib/neo4j/active_node/labels.rb

@@ -80,7 +80,7 @@ def count
         end
 
         def include?(other)
-          self.query_as(:n).limit(1).where("ID(n) = #{other.neo_id}").return("count(n) AS count").first.count == 1
+          self.query_as(:n).where("ID(n) = #{other.neo_id}").return("count(n) AS count").first.count > 0
         end
 
         def exists?(node_id=nil)

spec/e2e/active_model_spec.rb

@@ -560,6 +560,12 @@ class IncludeTeacher
         expect(IncludeTeacher.include?(mr_jones)).to be_truthy
         expect(IncludeTeacher.include?(math)).to be_falsey
       end
+
+      it 'works with multiple relationships to the same object' do
+        jimmy.lessons << science
+        jimmy.lessons << science
+        expect(jimmy.lessons.include?(science)).to be_truthy
+      end
     end
 
     describe 'exists?' do