Hi there,

I have a question on customize the db field. For this field, I want to
save integers in db, but want them to be my custom class when they are
used in Python code. In Django docs, it's said that I should set the
__metaclass__ to be models.SubfieldBase to make to_python() work. I
tried it and succeeded when all data of one db row are fetched.

But I then found that if I use query method like values(), values_list
() or only(), the data of my custom field will not be converted into
my desired type but the raw db integer. Then I tried Django's own
DateField, it works OK also in such scenario. So I think there must be
something I missed.

Could you help on this question? I cannot find more materials to move
on, so I'm very eager to get your help. Many thanks!

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