Display the sum of a field of a model that has a many2many relationship with its parent, in the parent table view

Question

Hi,
I am working on an agricultural project and have one model that represents all the zones where I have planted a crop and a second model that represents daily harvests data, connected by a many2many relationship.
The idea being that every day, an employee on each zone harvests the crop and inputs the amount harvested for that day in that zone.
When displaying the Zones in a table, I would like to see the sum of all the harvested amounts for that zone (i.e. the sum of the Kg_Harvested field in

Paresh Wagh · Answer

You will need to define a computed field in the Zones model that calculates the sum of the Kg_Harvested field in the x_harvests model corresponding to that record.

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