ERP5Storage: get now set parent_relative_url if available

This ensure that document created during synchro contains the same properties on local and remote storage.

src/jio.storage/erp5storage.js

@@ -85,6 +85,11 @@
           prefix_length,
           result;
 
+        if (json._links.hasOwnProperty('parent')) {
+          converted_json.parent_relative_url =
+            new URI(json._links.parent.href).segment(2);
+        }
+
         form_data_json.form_id = {
           "key": [form.form_id.key],
           "default": form.form_id["default"]

test/jio.storage/erp5storage.tests.js

@@ -175,6 +175,9 @@
         "_links": {
           type: {
             name: "Person"
+          },
+          parent: {
+            href: "urn:jio:get:foo_module"
           }
         },
         "_embedded": {
@@ -244,6 +247,7 @@
       .then(function (result) {
         deepEqual(result, {
           portal_type: "Person",
+          parent_relative_url: "foo_module",
           reference: "bar",
           reference_non_editable: "bar",
           title: "foo"
@@ -1995,6 +1999,9 @@
         "_links": {
           type: {
             name: "Person"
+          },
+          parent: {
+            href: "urn:jio:get:bar_module"
           }
         },
         "_embedded": {
@@ -2135,6 +2142,7 @@
         equal(result_list.length, 2);
         deepEqual(result, {
           portal_type: "Person",
+          parent_relative_url: "bar_module",
           reference: "bar",
           reference_non_editable: "bar",
           title: "foo"