added 2 more functions - create_unique_node and create_unique_realtio…

…nship

lib/neography/rest.rb

@@ -172,6 +172,14 @@ def create_relationship(type, from, to, props = nil)
          post("/node/#{get_id(from)}/relationships", options)
       end
 
+      def create_unique_relationship(index, key, value, type, from, to)
+        body = {:key=>key,:value=>value, :type => type }
+        body[:start] = self.configuration + "/node/#{get_id(from)}"
+        body[:end] = self.configuration + "/node/#{get_id(to)}"
+        options = { :body => body.to_json, :headers => {'Content-Type' => 'application/json'} } 
+        post("/index/relationship/#{index}?unique", options) 
+      end
+
       def get_relationship(id)
         get("/relationship/#{get_id(id)}")
       end
@@ -256,6 +264,11 @@ def add_node_to_index(index, key, value, id)
         post("/index/node/#{index}", options)
       end
 
+      def create_unique_node(index, key, value, props={})
+        options = { :body => ({:properties=>props, :key => key, :value => value }).to_json, :headers => {'Content-Type' => 'application/json'} } 
+        post("/index/node/#{index}?unique", options) 
+      end
+
       def remove_node_from_index(*args)
         case args.size
           when 4 then delete("/index/node/#{args[0]}/#{args[1]}/#{args[2]}/#{get_id(args[3])}")