[IMP] models: ORM speedup

This branch is the combination of several optimizations in the ORM:

* store field values once in the cache: the cache reflects more
faithfully the database, only fields that explicitly depend on the
context have an extra indirection in the cache;

* delay recomputations by default: use method `recompute` to explicitly
flush out pending recomputations;

* delay updates in method `write`: updates are stored in a data
structure that can be flushed efficiently to the database with method
`flush` (which also flush out recomputations);

* make method `modified` take advantage of inverse fields to inverse
dependencies;

* filter records by evaluating a domain on records in Python;

* a computed field with `readonly=False` behaves like a normal field
with an onchange method;

* computed fields are computed in superuser mode by default.

Work done by Toufik Ben Jaa, Raphael Collet, Denis Ledoux and Fabien
Pinckaers.

closes odoo/odoo#35659

Signed-off-by: Denis Ledoux <beledouxdenis@users.noreply.github.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/addons/base_sparse_field/models/fields.py b/addons/base_sparse_field/models/fields.py
index 131598f934c..199bc9c3494 100644
--- a/addons/base_sparse_field/models/fields.py
+++ b/addons/base_sparse_field/models/fields.py
@@ -82,11 +82,14 @@ class Serialized(fields.Field):
     column_type = ('text', 'text')
 
     def convert_to_column(self, value, record, values=None, validate=True):
-        return json.dumps(value)
+        return self.convert_to_cache(value, record, validate=validate)
 
     def convert_to_cache(self, value, record, validate=True):
-        # cache format: dict
-        value = value or {}
-        return value if isinstance(value, dict) else json.loads(value)
+        # cache format: json.dumps(value) or None
+        return json.dumps(value) if isinstance(value, dict) else (value or None)
+
+    def convert_to_record(self, value, record):
+        return json.loads(value or "{}")
+
 
 fields.Serialized = Serialized