Adrian Torres
9f11a84d71
Before this commit, calling read_group on a model and grouping by a
selection field would return the groups in alphabetical order, meaning
that if your selection field's options were declared as:
('z', 'Z'), ('a', 'A')
read_group would return first group 'a' and then group 'z', instead of
groups 'z' and then 'a' which some might expect.
With this commit, it is now possible to set a fields.Selection
group_expand attribute to `True` when declaring it, which will use a
default group_expand implementation specific to Selection fields, this
means that when grouping by a Selection field with `group_expand=True`
it will always return the groups in the definition order of the
selection options.
We achieve this by leveraging the group_expand field attribute which was
designed for changing the groups returned by read_group.
Since this attribute was thought only to be implemented on a
Model-by-Model basis and here we need to use it as a generic function
for all Selection fields (explicit group_expand declarations have higher
precedence), the generic method has been implemented inside
fields.Selection and takes an extra records parameter which holds a
reference to the recordset/model on which read_group was called. This
extra parameter only applies to field implementations of group_expand
and in this case is what allows this specific feature to work with
dynamic Selection fields (function as options).
A side-effect of this implementation is that a read_group call that
groups by a Selection field with `group_expand=True` that uses the
default group_expand will always return all possible groups, even
empty ones.
Task-ID 2635052
closes odoo/odoo#75856
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>
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