Allow grouping by date products by location
Following https://discuss.tryton.org/t/optimization-of-stock-supply/5380/8 it will be good to be able to retrieve the quantity delta grouped by date in a single query.
Following https://discuss.tryton.org/t/optimization-of-stock-supply/5380/8 it will be good to be able to retrieve the quantity delta grouped by date in a single query.