diff --git a/invenio_communities/records/records/systemfields/communities/field.py b/invenio_communities/records/records/systemfields/communities/field.py
index 0d75207de..cf7a6a64b 100644
--- a/invenio_communities/records/records/systemfields/communities/field.py
+++ b/invenio_communities/records/records/systemfields/communities/field.py
@@ -10,6 +10,7 @@
 
 from invenio_records.systemfields import SystemField
 
+from .....utils import filter_dict_keys
 from .context import CommunitiesFieldContext
 from .manager import CommunitiesRelationManager
 
@@ -57,3 +58,42 @@ def __get__(self, record, owner=None):
         if record is None:
             return self._context_cls(self, owner)
         return self.obj(record)
+
+    def post_dump(self, record, data, dumper=None):
+        """Dump the communities field."""
+        comms = getattr(record, self.attr_name)
+        res = comms.to_dict()
+        keep_fields = [
+            "uuid",
+            "created",
+            "updated",
+            "id",
+            "slug",
+            "theme",
+            "version_id",
+            "metadata.title",
+            "metadata.type",
+            "metadata.website",
+            "metadata.organizations",
+            "metadata.funding",
+            "parent.id",
+            "parent.slug",
+            "parent.theme",
+            "parent.metadata.title",
+            "parent.metadata.type",
+            "parent.metadata.website",
+            "parent.metadata.organizations",
+            "parent.metadata.funding",
+        ]
+        if res:
+            res["entries"] = [
+                filter_dict_keys(comm.dumps(), keep_fields) for comm in comms
+            ]
+            data[self.key] = res
+
+    def post_load(self, record, data, loader=None):
+        """Laod the parent community using the OS data (preventing a DB query)."""
+        comms = data.get("communities")
+        if comms:
+            obj = self._manager_cls(self._m2m_model_cls, record.id, comms)
+            self._set_cache(record, obj)
diff --git a/invenio_communities/records/records/systemfields/communities/manager.py b/invenio_communities/records/records/systemfields/communities/manager.py
index 93c45dddd..c4330edff 100644
--- a/invenio_communities/records/records/systemfields/communities/manager.py
+++ b/invenio_communities/records/records/systemfields/communities/manager.py
@@ -12,6 +12,8 @@
 associated with a record.
 """
 
+import uuid
+
 from invenio_db import db
 from invenio_records.api import Record
 
@@ -36,8 +38,8 @@ def __init__(self, m2m_model_cls, record_id, data):
     #
     def _to_id(self, val):
         """Get the community id."""
-        if isinstance(val, str):
-            return val
+        if isinstance(val, (str, uuid.UUID)):
+            return str(val)
         elif isinstance(val, Record):
             return str(val.id)
         return None
@@ -159,6 +161,11 @@ def default(self):
             return self._lookup_community(self._default_id)
         return None
 
+    @property
+    def entries(self):
+        """Get community objects list."""
+        return list(self)
+
     @default.setter
     def default(self, community_or_id):
         """Set the default community.
@@ -194,4 +201,9 @@ def from_dict(self, data):
         data = data or {}
         self._default_id = data.get("default", None)
         self._communities_ids = set(data.get("ids", []))
+        # Search results will have denormalized communities, so we can populate the
+        # cache from it.
+        entries = data.pop("entries", None)
+        if entries:
+            self._communities_cache = {c["id"]: Community.loads(c) for c in entries}
         return self