Hi,

I have a custom computed field that I use in v17. This is calculating the latest date among a list of dates

When I upgraded to v18 on a test database, I get the following error

ValueError: Cannot convert mycustommodel.mycustomfield to SQL because it is not stored

If I change the parameter of my field  to "stored", then I no longer have the error but the field isn't computed anymore. Empty.

Here is the Python code for the computation :

for record in self:

    dates = []

    for line in record.custommodelwheremydatesare:

        if line.fieldwithdate:

            dates.append(line.fieldwithdate)

    if dates:

        record['mycustomcomputedfield'] = max(dates)

    else:

        record['mycustomcomputedfield'] = False

Any idea ?