Hi,
Suppose that in my db table I have a text field that stores data in an XML
format. One day, I decide to change it to a text field with the same name
but convert the data to json. In other words, I'd like to specify a
migration rule (maybe a callback?) that would convert every single entry in
my db from xml to json. Is there support for such a thing in web2py?
Another example: My field stores double data that represents amounts of
money. Then I decide to change it to int, so the migration rule would be:
new_field = int(old_field*100.0)
return new_field
