REName base_sparse_field to base_sparse_field_list_support with only monkey patch

base_sparse_field_list_support/__init__.py

@@ -0,0 +1,2 @@
+# coding: utf-8
+from . import models

base_sparse_field_list_support/__manifest__.py

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+# -*- coding: utf-8 -*-
+{
+    "name": "Base Sparse Field List Support",
+    "summary": "add list support to convert_to_cache()",
+    "version": "8.0.1.0.0",
+    'category': 'Technical Settings',
+    "website": "www.akretion.com",
+    "author": " Akretion",
+    "license": "AGPL-3",
+    "application": False,
+    "installable": True,
+    "depends": [
+        "base",
+    ],
+}

base_sparse_field_list_support/models/__init__.py

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+# coding: utf-8
+from . import fields

base_sparse_field_list_support/models/fields.py

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+# -*- coding: utf-8 -*-
+
+import json
+
+from odoo import fields
+
+#
+# Definition and implementation of serialized fields: override
+#
+
+
+def convert_to_cache(self, value, record, validate=True):
+    # cache format: dict / list
+    value = value or {}
+    return value if isinstance(value, (dict, list)) else json.loads(value)
+
+
+fields.Serialized.convert_to_cache = convert_to_cache