[FIX] models: log field names in api.onchange warning

Without this, the warning isn't very actionable.

closes odoo/odoo#75858

X-original-commit: afe7c9895914125fb31dbfde15903fa41e000948
Signed-off-by: Olivier Dony (odo) <odo@openerp.com>
Signed-off-by: Wolfgang Taferner <wtaferner@users.noreply.github.com>

odoo/models.py

@@ -802,10 +802,16 @@ class BaseModel(metaclass=MetaModel):
         cls = type(self)
         methods = defaultdict(list)
         for attr, func in getmembers(cls, is_onchange):
+            missing = []
             for name in func._onchange:
                 if name not in cls._fields:
-                    _logger.warning("@onchange%r parameters must be field names", func._onchange)
+                    missing.append(name)
                 methods[name].append(func)
+            if missing:
+                _logger.warning(
+                    "@api.onchange%r parameters must be field names -> not valid: %s",
+                    func._onchange, missing
+                )
 
         # add onchange methods to implement "change_default" on fields
         def onchange_default(field, self):