Edit form: default value for Selectfield

[SergShulga]

Hi all! I have redefined one of the form fields as a SelectField with a set of values ​​(I want to limit the user to the available options).

Everything works fine, but there is a problem: when you go to edit an existing record, the value that this field had from the database disappears. It becomes either the first one in the list or empty if I use allow_blank=True.

Question: how can I fill this field by default with the value that was previously saved (in this case the field has a valid value - earlier I also selected it from the list)?

[SergShulga]

Resolved

[aminalaee]

Please post your solution as it might help other people.