diff options
| -rw-r--r-- | openerp/fields.py | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/openerp/fields.py b/openerp/fields.py index a2dd7a094f4..d0055ebcb3e 100644 --- a/openerp/fields.py +++ b/openerp/fields.py @@ -1386,13 +1386,32 @@ class Many2one(_Relational): record[self.name] = record.env[self.comodel_name].new() +class UnionUpdate(SpecialValue): + """ Placeholder for a value update; when this value is taken from the cache, + it returns ``record[field.name] | value`` and stores it in the cache. + """ + def __init__(self, field, record, value): + self.args = (field, record, value) + + def get(self): + field, record, value = self.args + # in order to read the current field's value, remove self from cache + del record._cache[field] + # read the current field's value, and update it in cache only + record._cache[field] = new_value = record[field.name] | value + return new_value + + class _RelationalMulti(_Relational): """ Abstract class for relational fields *2many. """ def _update(self, records, value): """ Update the cached value of `self` for `records` with `value`. """ for record in records: - record._cache[self] = record[self.name] | value + if self in record._cache: + record._cache[self] = record[self.name] | value + else: + record._cache[self] = UnionUpdate(self, record, value) def convert_to_cache(self, value, record, validate=True): if isinstance(value, BaseModel): |