added create_relationship

README.rdoc

@@ -43,6 +43,7 @@ A thin ruby wrapper Neography::Rest which tries to mirror the Neo4j Rest API and
   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
+  Neography::Rest.create_relationship("friends", node1, node2) # Create a relationship between node1 and node2
 
 ... and a work in progress more rubyish layer that's not quite ready for use yet.
 

lib/neography/rest.rb

@@ -63,7 +63,10 @@ def delete_node(id)
         rescue_ij { delete("/node/#{id}") }
       end
 
-
+      def create_relationship(type, from, to, props = nil)
+         options = { :body => {:to => Neography::Config.to_s + "/node/#{to}", :data => props, :type => type }.to_json, :headers => {'Content-Type' => 'application/json'} } 
+         rescue_ij { post("/node/#{from}/relationships", options) }
+      end
 
      private
 

spec/integration/rest_spec.rb

@@ -164,6 +164,17 @@
       existing_node.should be_nil
     end
 
+    it "cannot delete a node that has relationships" do
+      new_node1 = Neography::Rest.create_node
+      new_node1[:id] = new_node1["self"].split('/').last
+      new_node2 = Neography::Rest.create_node
+      new_node2[:id] = new_node2["self"].split('/').last
+      Neography::Rest.create_relationship("friends", new_node1[:id], new_node2[:id])
+      Neography::Rest.delete_node(new_node1[:id]).should be_nil
+      existing_node = Neography::Rest.get_node(new_node1[:id])
+      existing_node.should_not be_nil
+    end
+
     it "returns nil if it tries to delete a node that does not exist" do
       new_node = Neography::Rest.create_node
       new_node[:id] = new_node["self"].split('/').last
@@ -184,4 +195,75 @@
     end
   end
 
+  describe "delete_node!" do
+    it "can delete an unrelated node" do
+      new_node = Neography::Rest.create_node
+      new_node[:id] = new_node["self"].split('/').last
+      Neography::Rest.delete_node!(new_node[:id]).should be_nil
+      existing_node = Neography::Rest.get_node(new_node[:id])
+      existing_node.should be_nil
+    end
+
+    it "can delete a node that has relationships" do
+      new_node1 = Neography::Rest.create_node
+      new_node1[:id] = new_node1["self"].split('/').last
+      new_node2 = Neography::Rest.create_node
+      new_node2[:id] = new_node2["self"].split('/').last
+      Neography::Rest.create_relationship("friends", new_node1[:id], new_node2[:id])
+      Neography::Rest.delete_node!(new_node1[:id]).should be_nil
+      existing_node = Neography::Rest.get_node(new_node1[:id])
+      existing_node.should be_nil
+    end
+
+    it "returns nil if it tries to delete a node that does not exist" do
+      new_node = Neography::Rest.create_node
+      new_node[:id] = new_node["self"].split('/').last
+      Neography::Rest.delete_node!(new_node[:id].to_i + 1000).should be_nil
+      existing_node = Neography::Rest.get_node(new_node[:id].to_i + 1000)
+      existing_node.should be_nil
+    end
+
+    it "returns nil if it tries to delete a node that has already been deleted" do
+      new_node = Neography::Rest.create_node
+      new_node[:id] = new_node["self"].split('/').last
+      Neography::Rest.delete_node!(new_node[:id]).should be_nil
+      existing_node = Neography::Rest.get_node(new_node[:id])
+      existing_node.should be_nil
+      Neography::Rest.delete_node!(new_node[:id]).should be_nil
+      existing_node = Neography::Rest.get_node(new_node[:id])
+      existing_node.should be_nil
+    end
+  end
+
+  describe "create_relationship" do
+    it "can create an empty relationship" do
+      new_node1 = Neography::Rest.create_node
+      new_node1[:id] = new_node1["self"].split('/').last
+      new_node2 = Neography::Rest.create_node
+      new_node2[:id] = new_node2["self"].split('/').last
+      new_relationship = Neography::Rest.create_relationship("friends", new_node1[:id], new_node2[:id])
+      new_relationship["start"].should_not be_nil
+      new_relationship["end"].should_not be_nil
+    end
+
+    it "can create a relationship with one property" do
+      new_node1 = Neography::Rest.create_node
+      new_node1[:id] = new_node1["self"].split('/').last
+      new_node2 = Neography::Rest.create_node
+      new_node2[:id] = new_node2["self"].split('/').last
+      new_relationship = Neography::Rest.create_relationship("friends", new_node1[:id], new_node2[:id], {"since" => '10-1-2010'})
+      new_relationship["data"]["since"].should == '10-1-2010'
+    end
+
+    it "can create a relationship with more than one property" do
+      new_node1 = Neography::Rest.create_node
+      new_node1[:id] = new_node1["self"].split('/').last
+      new_node2 = Neography::Rest.create_node
+      new_node2[:id] = new_node2["self"].split('/').last
+      new_relationship = Neography::Rest.create_relationship("friends", new_node1[:id], new_node2[:id], {"since" => '10-1-2010', "met" => "college"})
+      new_relationship["data"]["since"].should == '10-1-2010'
+      new_relationship["data"]["met"].should == "college"
+    end
+  end
+
 end