A little more work towards this

src/documents/migrations/1040_customfield_customfieldboolean_customfielddate_and_more.py

@@ -1,13 +1,15 @@
-# Generated by Django 4.2.5 on 2023-10-22 23:47
+# Generated by Django 4.2.5 on 2023-10-25 13:49
 
 import django.db.models.deletion
 import django.utils.timezone
+from django.conf import settings
 from django.db import migrations
 from django.db import models
 
 
 class Migration(migrations.Migration):
     dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
         ("documents", "1039_consumptiontemplate"),
     ]
 
@@ -138,6 +140,16 @@ class Migration(migrations.Migration):
                         to="documents.customfield",
                     ),
                 ),
+                (
+                    "owner",
+                    models.ForeignKey(
+                        blank=True,
+                        null=True,
+                        on_delete=django.db.models.deletion.SET_NULL,
+                        to=settings.AUTH_USER_MODEL,
+                        verbose_name="owner",
+                    ),
+                ),
             ],
             options={
                 "verbose_name": "custom field instance",

src/documents/models.py

@@ -920,7 +920,7 @@ class CustomField(models.Model):
         return f"{self.name} : {self.data_type}"
 
 
-class CustomFieldInstance(models.Model):
+class CustomFieldInstance(ModelWithOwner):
     """
     A single instance of a field, attached to a CustomField for the name and type
     and attached to a single Document to be metadata for it

src/documents/serialisers.py

@@ -21,6 +21,8 @@ from documents import bulk_edit
 from documents.data_models import DocumentSource
 from documents.models import ConsumptionTemplate
 from documents.models import Correspondent
+from documents.models import CustomField
+from documents.models import CustomFieldInstance
 from documents.models import Document
 from documents.models import DocumentType
 from documents.models import MatchingModel
@@ -1090,3 +1092,13 @@ class ConsumptionTemplateSerializer(serializers.ModelSerializer):
             )
 
         return attrs
+
+
+class CustomFieldSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = CustomField
+
+
+class CustomFieldInstanceSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = CustomFieldInstance

src/documents/views.py

@@ -1,8 +1,10 @@
 import itertools
+import json
 import logging
 import os
 import re
 import tempfile
+import urllib
 import zipfile
 from datetime import datetime
 from pathlib import Path
@@ -35,6 +37,7 @@ from django.views.decorators.cache import cache_control
 from django.views.generic import TemplateView
 from django_filters.rest_framework import DjangoFilterBackend
 from langdetect import detect
+from packaging import version as packaging_version
 from rest_framework import parsers
 from rest_framework.decorators import action
 from rest_framework.exceptions import NotFound
@@ -75,8 +78,7 @@ from documents.matching import match_storage_paths
 from documents.matching import match_tags
 from documents.models import ConsumptionTemplate
 from documents.models import Correspondent
-
-# from documents.models import CustomMetadata
+from documents.models import CustomField
 from documents.models import Document
 from documents.models import DocumentType
 from documents.models import Note
@@ -98,6 +100,7 @@ from documents.serialisers import BulkEditObjectPermissionsSerializer
 from documents.serialisers import BulkEditSerializer
 from documents.serialisers import ConsumptionTemplateSerializer
 from documents.serialisers import CorrespondentSerializer
+from documents.serialisers import CustomFieldSerializer
 from documents.serialisers import DocumentListSerializer
 from documents.serialisers import DocumentSerializer
 from documents.serialisers import DocumentTypeSerializer
@@ -110,6 +113,7 @@ from documents.serialisers import TagSerializerVersion1
 from documents.serialisers import TasksViewSerializer
 from documents.serialisers import UiSettingsViewSerializer
 from documents.tasks import consume_file
+from paperless import version
 from paperless.db import GnuPG
 from paperless.views import StandardPagination
 
@@ -1241,6 +1245,47 @@ class UiSettingsView(GenericAPIView):
         )
 
 
+class RemoteVersionView(GenericAPIView):
+    def get(self, request, format=None):
+        remote_version = "0.0.0"
+        is_greater_than_current = False
+        current_version = packaging_version.parse(version.__full_version_str__)
+        try:
+            req = urllib.request.Request(
+                "https://api.github.com/repos/paperlessngx/"
+                "paperlessngx/releases/latest",
+            )
+            # Ensure a JSON response
+            req.add_header("Accept", "application/json")
+
+            with urllib.request.urlopen(req) as response:
+                remote = response.read().decode("utf8")
+            try:
+                remote_json = json.loads(remote)
+                remote_version = remote_json["tag_name"]
+                # Basically PEP 616 but that only went in 3.9
+                if remote_version.startswith("ngx"):
+                    remote_version = remote_version[len("ngx") :]
+            except ValueError:
+                logger.debug("An error occurred parsing remote version json")
+        except urllib.error.URLError:
+            logger.debug("An error occurred checking for available updates")
+
+        is_greater_than_current = (
+            packaging_version.parse(
+                remote_version,
+            )
+            > current_version
+        )
+
+        return Response(
+            {
+                "version": remote_version,
+                "update_available": is_greater_than_current,
+            },
+        )
+
+
 class TasksViewSet(ReadOnlyModelViewSet):
     permission_classes = (IsAuthenticated,)
     serializer_class = TasksViewSerializer
@@ -1397,3 +1442,14 @@ class ConsumptionTemplateViewSet(ModelViewSet):
     model = ConsumptionTemplate
 
     queryset = ConsumptionTemplate.objects.all().order_by("order")
+
+
+class CustomFieldViewSet(ModelViewSet):
+    permission_classes = (IsAuthenticated, PaperlessObjectPermissions)
+
+    serializer_class = CustomFieldSerializer
+    pagination_class = StandardPagination
+
+    model = CustomField
+
+    queryset = CustomField.objects.all().order_by("-created")

src/paperless/urls.py

@@ -16,6 +16,7 @@ from documents.views import BulkEditObjectPermissionsView
 from documents.views import BulkEditView
 from documents.views import ConsumptionTemplateViewSet
 from documents.views import CorrespondentViewSet
+from documents.views import CustomFieldViewSet
 from documents.views import DocumentTypeViewSet
 from documents.views import IndexView
 from documents.views import LogViewSet
@@ -55,6 +56,7 @@ api_router.register(r"mail_accounts", MailAccountViewSet)
 api_router.register(r"mail_rules", MailRuleViewSet)
 api_router.register(r"share_links", ShareLinkViewSet)
 api_router.register(r"consumption_templates", ConsumptionTemplateViewSet)
+api_router.register(r"custom_fields", CustomFieldViewSet)
 
 
 urlpatterns = [