Add delete_relationship to batch operations.

lib/neography/rest.rb

@@ -509,6 +509,8 @@ def get_batch(args)
             {:method => "POST", :to => (args[2].is_a?(String) && args[2].start_with?("{") ? "" : "/node/") + "#{get_id(args[2])}/relationships", :body => {:to => (args[3].is_a?(String) && args[3].start_with?("{") ? "" : "/node/") + "#{get_id(args[3])}", :type => args[1], :data => args[4] } }
           when :create_unique_relationship
             {:method => "POST", :to => "/index/relationship/#{args[1]}?unique", :body => {:key => args[2], :value => args[3], :type => args[4], :start => (args[5].is_a?(String) && args[5].start_with?("{") ? "" : "/node/") + "#{get_id(args[5])}", :end=> (args[6].is_a?(String) && args[6].start_with?("{") ? "" : "/node/") + "#{get_id(args[6])}"} }
+          when :delete_relationship
+            {:method => "DELETE", :to => "/relationship/#{get_id(args[1])}"}
           when :set_relationship_property
             {:method => "PUT", :to => "/relationship/#{get_id(args[1])}/properties/#{args[2].keys.first}", :body => args[2].values.first}
           when :reset_relationship_properties

spec/integration/rest_batch_spec.rb

@@ -144,6 +144,18 @@
       batch_result.first["body"]["end"].split('/').last.should == node2["self"].split('/').last
     end
 
+    it "can delete a single relationship" do
+      node1 = @neo.create_node
+      node2 = @neo.create_node
+      batch_result = @neo.batch [:create_relationship, "friends", node1, node2, {:since => "time immemorial"}]
+      batch_result.should_not be_nil
+	  batch_result[0]["status"].should == 201
+	  id = batch_result.first["body"]["self"].split("/").last
+      batch_result = @neo.batch [:delete_relationship, id]
+	  batch_result[0]["status"].should == 204
+      batch_result[0]["from"].should == "/relationship/#{id}"
+    end
+
     it "can create a unique relationship" do
       index_name = generate_text(6)
       key = generate_text(6)