Probably since recent js framework changes, when trying
to modify the matrix of a product on a new SO (not saved),
a js error was raised (wrong qweb template rendering).
This is due to a wrong check when loading the matrix data,
in the case of a new record, the data wasn't correctly updated
on all widgets, resulting in an opening of the matrix with the results
of the last matrix changes (since the information is transferred in the same field).
This commit:
* Ensures that the correct data is taken to open the matrix (solving the main
problem of matrix update on new records)
* Improves test coverage to cover untested buggy situation
* Fixes another error found while improving test coverage:
The edition of existing quantities was wrongly creating new lines, instead of updating
existing ones. Simplify lines comparison to ensure the matrix won't generate two lines
for the same variant combination.
closesodoo/odoo#54917
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>
Victor Feyens