len-odoo
e5486c12bc
Combining a list of elements containing only the monoid's unit should return the unit. Since the unit is skipped, it would return an empty domain instead of the unit, meaning that (0, '=', 1) could not be used in a group rule. To test this, create a record rule on a model M with domain (0, '=', 1) that applies to group G. Log in with a user in group G and access model M; you can read everything (provided no other record rule applies) whereas you should see nothing. Because of expression.AND(global_domains + [expression.OR(group_domains)]) we want the empty domain to still be left untouched, even if it violates the OR's unit rules (i.e. OR(empty, OR(R)) = OR(R) <=> OR(empty) = unit). Meaning that no group rule would reduce to having a (0, '=' 1) group rule. So in the end we don't really care about all that algebraic nonsense. closes odoo/odoo#28765
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