Posting it again because my last post(7 days old) was not approved.

I am facing issue while updating record using SQLFORM when readable and 
writable is False for id field and record_versioning is on. I am explaining 
this issue with example app 'mywiki' given in web2py book 
<http://www.web2py.com/books/default/chapter/29/03/overview#A-simple-wiki>.

I only added following line in db.py to enable record versioning and to 
hide id field in forms. Did no changes in controller or other code.

db._common_fields.append(auth.signature)

db.define_table('page',
                Field('title'),
                Field('body', 'text'),
                Field('created_on', 'datetime', default=request.now),
                Field('created_by', 'reference auth_user', 
default=auth.user_id),
                format='%(title)s')

db.page.id.readable = db.page.id.writable = False
# other table definations.....


auth.enable_record_versioning(db) # at the end of file

here is edit controller function:

def edit():
    """edit an existing wiki page"""
    this_page = db.page(request.args(0, cast=int)) or redirect(URL('index'))
    form = SQLFORM(db.page, this_page).process(
        next = URL('show', args=request.args))
    return dict(form=form)

Now when I submit the update form without updating anything in form,

I got error- KeyError: 'id' Here is complete traceback 
https://paste.ubuntu.com/23442757/

I debugged through web2py framework code and found that error comes while 
creating entry in archive table, and only when writable False and that to 
for id field because _filter_fields filters out id field.

I think, I am missing something simple here I am using web2py-2.14.6.

Also posted this on stackoverflow 
<http://stackoverflow.com/questions/40478479/update-sqlform-gives-keyerror>


Please help me to fix the error!

Thank You

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