I have a simple piece of code:

form = SQLFORM.factory(Field("readonly_field", writable=False, default="can't 
change")
                       ,Field("some_field", requires=IS_LENGTH(10,5))
                       ,Field("some_flag", "boolean", writable=False, 
default=True))

if form.process().accepted:
    print("accepted")

return dict(form=form)


Note that the "some_flag" field is defaulted to "true". If the form is 
submitted successfully, everything happens as expected: the "some_field" is 
blank but the other two fields have their original defaulted values. 

Now, if the form fails validation, the "some_flag" checkbox is unchecked. 
The other read-only field still has its value.

It should also be noted that using the "keepvalues" flag in the "process" 
function will persist the value in "some_field", but has no effect on 
whether the "some_flag" checkbox is checked.

This looks like a bug, but if I'm doing something wrong I'm open to 
alternatives.

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