Update uploader sidebar box to v12

* records can only have a single owner in v12

invenio_theme_tuw/theme/templates/semantic-ui/invenio_theme_tuw/details/uploaders.html

@@ -6,7 +6,7 @@
 #}
 
 {%- set rec = record.id|resolve_record -%}
-{%- set uploader = rec|resolve_first_user_owner -%}
+{%- set uploader = rec|resolve_user_owner -%}
 {%- set current_user_owns_record = current_user and current_user.id == uploader.id -%}
 <section id="record-owners" aria-label="{{ _('Export') }}" class="ui segment rdm-sidebar owners">
   <h1 class="ui small header">{{ _('Depositor')}}</h1>

invenio_theme_tuw/views.py

@@ -106,19 +106,17 @@ def resolve_record(recid):
         return rec_service.draft_cls.pid.resolve(recid, registered_only=False)
 
 
-def resolve_first_user_owner(record):
+def resolve_user_owner(record):
     """Resolve the first user-type owner of the record.
 
     The record is expected to be an API-class object, and the result will be a User
     model object.
     """
-    owners = record.parent.access.owners or []
-    user_owners = [owner for owner in owners if owner.owner_type == "user"]
-
-    if not user_owners:
+    owner = record.parent.access.owner
+    if not owner or owner.owner_type != "user":
         return None
 
-    return user_owners[0].resolve()
+    return owner.resolve()
 
 
 def get_name_of_user_owner(owner):
@@ -349,7 +347,7 @@ def create_blueprint(app):
 
     # register filters for showing uploaders
     blueprint.add_app_template_filter(resolve_record)
-    blueprint.add_app_template_filter(resolve_first_user_owner)
+    blueprint.add_app_template_filter(resolve_user_owner)
 
     return blueprint