diff --git a/.gitignore b/.gitignore
index 0bf387c..d1567ab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,16 +1,10 @@
-__pycache__
-.DS_Store
-pyvenv.cfg
 .coverage
-coverage.json
-.python-version
 *.egg-info
 *.log
 *.mo
 *.py?
 *.swp
 # dirs
-__pycache__
 bin/
 buildout-cache/
 develop-eggs/
@@ -21,7 +15,6 @@ lib/
 local/
 node_modules/
 parts/
-src/*
 dist/*
 test.plone_addon/
 var/
@@ -36,12 +29,5 @@ report.html
 .vscode/
 .tox/
 reports/
+venv/
 # excludes
-!.coveragerc
-!.editorconfig
-!.gitattributes
-!.gitignore
-!.gitkeep
-!.travis.yml
-!src/redturtle
-.idea/
diff --git a/CHANGES.rst b/CHANGES.rst
index a51e44e..47ea2c1 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,7 +4,8 @@ Changelog
 1.1.2 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Register IObjectPrimaryFieldTarget for #28820.
+  [cekk]
 
 
 1.1.1 (2024-07-18)
diff --git a/src/rer/externalnews/configure.zcml b/src/rer/externalnews/configure.zcml
index 4377262..02b7baa 100644
--- a/src/rer/externalnews/configure.zcml
+++ b/src/rer/externalnews/configure.zcml
@@ -8,6 +8,7 @@
   <i18n:registerTranslations directory="locales" />
 
   <include package=".browser" />
+  <include package=".restapi" />
   <include package=".upgrades" />
 
   <genericsetup:registerProfile
diff --git a/src/rer/externalnews/restapi/__init__.py b/src/rer/externalnews/restapi/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/rer/externalnews/restapi/configure.zcml b/src/rer/externalnews/restapi/configure.zcml
new file mode 100644
index 0000000..0a95834
--- /dev/null
+++ b/src/rer/externalnews/restapi/configure.zcml
@@ -0,0 +1,12 @@
+<configure
+    xmlns="http://namespaces.zope.org/zope"
+    xmlns:plone="http://namespaces.plone.org/plone"
+    >
+
+  <include
+      package="plone.restapi"
+      file="configure.zcml"
+      />
+  <include package=".serializer" />
+
+</configure>
diff --git a/src/rer/externalnews/restapi/serializer/__init__.py b/src/rer/externalnews/restapi/serializer/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/rer/externalnews/restapi/serializer/configure.zcml b/src/rer/externalnews/restapi/serializer/configure.zcml
new file mode 100644
index 0000000..2a3a44c
--- /dev/null
+++ b/src/rer/externalnews/restapi/serializer/configure.zcml
@@ -0,0 +1,10 @@
+<configure
+    xmlns="http://namespaces.zope.org/zope"
+    xmlns:zcml="http://namespaces.zope.org/zcml"
+    i18n_domain="plone.restapi"
+    >
+
+  <adapter factory=".dxcontent.ExternalNewsObjectPrimaryFieldTarget" />
+
+
+</configure>
diff --git a/src/rer/externalnews/restapi/serializer/dxcontent.py b/src/rer/externalnews/restapi/serializer/dxcontent.py
new file mode 100644
index 0000000..923decc
--- /dev/null
+++ b/src/rer/externalnews/restapi/serializer/dxcontent.py
@@ -0,0 +1,26 @@
+from rer.externalnews.interfaces import IExternalNews
+from plone.restapi.interfaces import IObjectPrimaryFieldTarget
+from Products.CMFCore.utils import getToolByName
+from zope.component import adapter
+from zope.interface import implementer
+from zope.interface import Interface
+
+
+@adapter(IExternalNews, Interface)
+@implementer(IObjectPrimaryFieldTarget)
+class ExternalNewsObjectPrimaryFieldTarget:
+    """ """
+
+    def __init__(self, context, request):
+        self.context = context
+        self.request = request
+
+        self.permission_cache = {}
+
+    def __call__(self):
+        """
+        If user can edit Link object, do not return remoteUrl
+        """
+        pm = getToolByName(self.context, "portal_membership")
+        if bool(pm.isAnonymousUser()):
+            return getattr(self.context, "externalUrl", "")