bypass jsonpatch (#809)

Author: rmorshea

docs/source/about/changelog.rst

@@ -23,7 +23,9 @@ more info, see the :ref:`Contributor Guide <Creating a Changelog Entry>`.
 Unreleased
 ----------
 
-No changes.
+**Changed**
+
+- :pull:`809` - Avoid the use of JSON patch for diffing models.
 
 
 v0.40.1
@@ -32,7 +34,7 @@ v0.40.1
 
 **Fixed**
 
-- :issue:`806` - child models after a component fail to render
+- :issue:`806` - Child models after a component fail to render
 
 
 v0.40.0 (yanked)

src/idom/core/_fixed_jsonpatch.py

@@ -6,8 +6,8 @@
 from typing import Any, Awaitable, Callable, Dict, List, NamedTuple, cast
 
 from anyio import create_task_group
+from jsonpatch import apply_patch
 
-from ._fixed_jsonpatch import apply_patch, make_patch  # type: ignore
 from .layout import LayoutEvent, LayoutUpdate
 from .types import LayoutType, VdomJson
 
@@ -74,7 +74,7 @@ def apply_to(self, model: VdomJson) -> VdomJson:
     @classmethod
     def create_from(cls, update: LayoutUpdate) -> VdomJsonPatch:
         """Return a patch given an layout update"""
-        return cls(update.path, make_patch(update.old or {}, update.new).patch)
+        return cls(update.path, [{"op": "replace", "path": "", "value": update.new}])
 
 
 async def _single_outgoing_loop(