How to set store = true for existing fields?

Question

Since a lot of fields do not show any subtotals (SUM) if they are "grouped by" i would like to know how i can/should set the store=true parameter for existing fields of OpenERP?!?

eg. for the field:

Modell: hr_timesheet_sheet.sheet

Field:    total_timesheet

(If i group the treeview of timesheets to validate by Employees i can not see the subtotals of total_timesheet in the treeview by employee.)

Ali Ravani · Answer

copy both function fields and its function to your module and then add store=True
e.g

'total_timesheet': fields.function(_total, method=True, string='Total Timesheet', multi="_total"),
'total_timesheet': fields.function(_total, method=True, string='Total Timesheet', multi="_total", store=True),

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