get some properties

README.rdoc

@@ -37,7 +37,8 @@ A thin ruby wrapper Neography::Rest which tries to mirror the Neo4j Rest API and
   Neography::Rest.get_node(id)                                 # Get a node and its properties
   Neography::Rest.reset_node_properties(id, {"age" => 31})     # Reset a node's properties
   Neography::Rest.set_node_properties(id, {"weight" => 200})   # Set a node's properties
-  Neography::Rest.get_node_properties(id)                      # Get just the properties
+  Neography::Rest.get_node_properties(id)                      # Get just the node properties
+  Neography::Rest.get_node_properties(id, ["weight","age"])    # Get some of the node properties
   Neography::Rest.remove_node_properties(id)                   # Remove all properties of a node
   Neography::Rest.remove_node_properties(id, "weight")         # Remove one property of a node
   Neography::Rest.remove_node_properties(id, ["weight","age"]) # Remove multiple properties of a node

lib/neography/rest.rb

@@ -28,8 +28,18 @@ def reset_node_properties(id, properties)
         rescue_ij { put("/node/#{id}/properties", options) }
       end
 
-      def get_node_properties(id)
-        rescue_ij { get("/node/#{id}/properties") }
+      def get_node_properties(id, properties = nil)
+        if properties.nil?
+          rescue_ij { get("/node/#{id}/properties") }
+        else
+          node_properties = Hash.new 
+          properties.to_a.each do |property| 
+            value = rescue_ij { get("/node/#{id}/properties/#{property}") } 
+            node_properties[property] = value unless value.nil?
+          end
+          return nil if node_properties.empty?
+          node_properties
+        end
       end
 
       def remove_node_properties(id, properties = nil)

spec/integration/rest_spec.rb

@@ -82,18 +82,33 @@
   end
 
   describe "get_node_properties" do
-    it "can get a node's properties" do
+    it "can get all a node's properties" do
       new_node = Neography::Rest.create_node("weight" => 200, "eyes" => "brown")
       new_node[:id] = new_node["self"].split('/').last
       node_properties = Neography::Rest.get_node_properties(new_node[:id])
       node_properties["weight"].should == 200
       node_properties["eyes"].should == "brown"
     end
 
+    it "can get some of a node's properties" do
+      new_node = Neography::Rest.create_node("weight" => 200, "eyes" => "brown", "height" => "2m")
+      new_node[:id] = new_node["self"].split('/').last
+      node_properties = Neography::Rest.get_node_properties(new_node[:id], ["weight", "height"])
+      node_properties["weight"].should == 200
+      node_properties["height"].should == "2m"
+      node_properties["eyes"].should be_nil
+    end
+
     it "returns nil if it gets the properties on a node that does not have any" do
       new_node = Neography::Rest.create_node
       new_node[:id] = new_node["self"].split('/').last
-      Neography::Rest.get_node_properties(new_node[:id].to_i + 10000).should be_nil
+      Neography::Rest.get_node_properties(new_node[:id]).should be_nil
+    end
+
+    it "returns nil if it tries to get some of the properties on a node that does not have any" do
+      new_node = Neography::Rest.create_node
+      new_node[:id] = new_node["self"].split('/').last
+      Neography::Rest.get_node_properties(new_node[:id], ["weight", "height"]).should be_nil
     end
 
     it "returns nil if it fails to get properties on a node that does not exist" do