This PR allows a line chart in cumulative mode to start at some
non zero value if some conditions are met.
For this, the attribute "cumulated_start" should be set to true on
the arch root node of the graph view. If set to true, if the first
groupby (if any) is a date/datetime field "d", and if the domain
contains a condition based on "d" - thus possibly excluding some
groups with "d" values inferior to the least "d" value found in
the fetched groups - the initial value for the cumulative chart
will be set to be the aggregated value for those excluded groups.
closesodoo/odoo#122321
Signed-off-by: Mathieu Duckerts-Antoine <dam@odoo.com>
Florian Damhaut
92a0907484