NodeMixin#update now has strict mode which removes properties not men…

…tioned in hash

lib/neo4j/mixins/node.rb

@@ -182,6 +182,8 @@ def value_object
 
     #
     # Updates this node's properties by using the provided struct/hash.
+    # If strict is true, any properties present on the node but not present in
+    # the hash will be removed from the node.
     #
     # ==== Parameters
     # struct_or_hash<#each_pair>:: the key and value to be set
@@ -190,12 +192,19 @@ def value_object
     # self
     #
     # :api: public
-    def update(struct_or_hash)
+    def update(struct_or_hash, strict=false)
+      keys_to_delete = props.keys - %w(id classname) if strict
       struct_or_hash.each_pair do |key, value|
         next if %w(id classname).include? key.to_s # do not allow special properties to be mass assigned
+        keys_to_delete.delete(key) if strict
         method = "#{key}=".to_sym
-        self.send(method, value) if self.respond_to?(method)
+        if self.respond_to?(method)
+          self.send(method, value)
+        else
+          set_property(key.to_s, value)
+        end
       end
+      keys_to_delete.each{|key| remove_property(key) } if strict
       self
     end
 

test/neo4j/node_mixin_spec.rb

@@ -157,6 +157,7 @@ class TestNode
     t.update({:name=>'123', :oj=>'hoj'})
     t.name.should == '123'
     t.age.should == nil
+    t['oj'].should == 'hoj'
   end
 
   it "should be able to update a node by using a hash" do