[FIX] attribute_set: assure _instanciate_attrs doesn't break

attribute_set/__init__.py

@@ -1,3 +1,4 @@
 from . import models
 from . import wizard
 from . import utils
+from .hooks import post_load_hook

attribute_set/__manifest__.py

@@ -18,4 +18,5 @@
     ],
     "external_dependencies": {"python": ["unidecode"]},
     "installable": True,
+    "post_load": "post_load_hook",
 }

attribute_set/hooks.py

@@ -0,0 +1,20 @@
+# Copyright 2023 ForgeFlow S.L.  <https://www.forgeflow.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from odoo.addons.base_sparse_field.models.models import IrModelFields
+
+
+def post_load_hook():
+    def _instanciate_attrs(self, field_data):
+        attrs = super(IrModelFields, self)._instanciate_attrs(field_data)
+        if attrs and field_data.get("serialization_field_id"):
+            serialization_record_id = field_data["serialization_field_id"]
+            try:
+                serialization_record = self.browse(serialization_record_id)
+                attrs["sparse"] = serialization_record.name
+            except AttributeError:
+                # due to https://github.com/OCA/odoo-pim/issues/134
+                # because depends_context isn't filled yet
+                attrs["sparse"] = None
+        return attrs
+
+    IrModelFields._instanciate_attrs = _instanciate_attrs