fix(types/utils): pass root context when no DX content in layout (#1917)

* fix(types/utils): pass root context when no DX content in layout

* chore: amend changelog

* tests(types): patch(update) blocks in DX layout

* tests(types): move tests in existing method

* Get the site root a better way in path2uid

---------

Co-authored-by: David Glick <[email protected]>

Author: nileshgulia1

news/1917.bugfix

@@ -0,0 +1 @@
+Fix `AttributeError` when updating the default blocks layout for a content type. @nileshgulia, @davisagli

src/plone/restapi/deserializer/utils.py

@@ -2,27 +2,36 @@
 from plone.app.redirector.interfaces import IRedirectionStorage
 from plone.uuid.interfaces import IUUID
 from plone.uuid.interfaces import IUUIDAware
-from zope.component import getMultiAdapter
+from Products.CMFCore.interfaces import ISiteRoot
 from zope.component import getUtility
+from zope.component.hooks import getSite
 
 import re
 
 
 PATH_RE = re.compile(r"^(.*?)((?=/@@|#).*)?$")
 
 
+def get_portal():
+    closest_site = getSite()
+    if closest_site is not None:
+        for potential_portal in closest_site.aq_chain:
+            if ISiteRoot.providedBy(potential_portal):
+                return potential_portal
+    raise Exception("Plone site root not found")
+
+
 def path2uid(context, link):
-    # unrestrictedTraverse requires a string on py3. see:
-    # https://github.com/zopefoundation/Zope/issues/674
     if not link:
         return ""
-    portal = getMultiAdapter(
-        (context, context.REQUEST), name="plone_portal_state"
-    ).portal()
+    portal = get_portal()
     portal_url = portal.portal_url()
     portal_path = "/".join(portal.getPhysicalPath())
     path = link
-    context_url = context.absolute_url()
+    try:
+        context_url = context.absolute_url()
+    except AttributeError:
+        context_url = portal_url
     relative_up = len(context_url.split("/")) - len(portal_url.split("/"))
     if path.startswith(portal_url):
         path = path[len(portal_url) + 1 :]

src/plone/restapi/tests/test_services_types.py

@@ -298,6 +298,24 @@ def test_types_document_patch_create_missing(self):
                             },
                             "5060e030-727b-47bc-8023-b80b7cccd96f": {"@type": "image"},
                             "e3d8f8e4-8fee-47e7-9451-28724bf74a90": {"@type": "text"},
+                            "d6a0a308-0757-4713-bfe0-359817b364cd": {
+                                "@type": "slate",
+                                "value": [
+                                    {
+                                        "type": "p",
+                                        "children": [
+                                            {"text": ""},
+                                            {
+                                                "type": "link",
+                                                "data": {"url": "/doc1"},
+                                                "children": [{"text": "Plone"}],
+                                            },
+                                            {"text": ""},
+                                        ],
+                                    }
+                                ],
+                                "plaintext": " Plone ",
+                            },
                         },
                     },
                     "blocks_layout": {
@@ -311,6 +329,7 @@ def test_types_document_patch_create_missing(self):
                                 "338013ce-acca-454f-a6f4-14113c187dca",
                                 "5060e030-727b-47bc-8023-b80b7cccd96f",
                                 "e3d8f8e4-8fee-47e7-9451-28724bf74a90",
+                                "d6a0a308-0757-4713-bfe0-359817b364cd",
                             ]
                         },
                     },