Wes -
I think we need a complete - if minimized example which others can use to
reproduce. Can you provide?
Thanks,
Yarko
On Fri, Nov 21, 2008 at 10:15 AM, mdipierro <[EMAIL PROTECTED]> wrote:
>
> SQLFORM(...,fields=[...])
>
> should be used to determine which fields are expected and which should
> be ignored.
>
> For T2 use
>
> db.table.exposes=[....] # list of field names
>
> Massimo
>
> On Nov 21, 9:52 am, billf <[EMAIL PROTECTED]> wrote:
> > Massimo
> >
> > I think there is a typo in your point 1) and it should read "update
> > form and it was *checked* in the original record". The behaviour of
> > the setting the checkbox value is not in question.
> >
> > I believe the problem Wes originally raised is that a boolean field on
> > the database gets set to False erroneously if a form does not contain
> > a control for that field (either hidden or a checkbox). This is
> > because web2py (any server-side code) cannot distinguish between an
> > unchecked checkbox and an absence of a checkbox. So the missing
> > control is interpreted as unchecked/false and stored as such. This
> > differs from other field types where a missing control can and is
> > interpreted as "no change".
> >
> > On Nov 21, 3:28 pm, mdipierro <[EMAIL PROTECTED]> wrote:
> >
> > > It was mentioned in one of the previous emails. I am not sure it helps
> > > with the current problem. I am not sure I understand the current
> > > problem.
> >
> > > checkboxes are always unchecked unless:
> > > 1) update form and it was unchecked in the original record
> > > 2) create form and corresponding field has default=True
> >
> > > Are you saying this is not the case or that I am missing something?
> > > I think this is the correct behavior
> >
> > > Massimo
> >
> > > On Nov 21, 8:49 am, billf <[EMAIL PROTECTED]> wrote:
> >
> > > > Massimo
> >
> > > > In what way are you suggesting "SQLFORM and and FORM take a parameter
> > > > hidden=dict(key='value')" would be used?
> >
> > > > Bill
> >
> > > > On Nov 21, 2:10 pm, mdipierro <[EMAIL PROTECTED]> wrote:
> >
> > > > > Do you have default=False in the database?
> >
> > > > > SQLFORM and and FORM take a parameter hidden=dict(key='value')
> >
> > > > > Massimo
> >
> > > > > On Nov 21, 6:32 am, billf <[EMAIL PROTECTED]> wrote:
> >
> > > > > > I am investigating a possible solution to the above problem that
> would
> > > > > > return fieldname=OFF if a displayed checkbox is unchecked.
> >
> > > > > > This would enable web2py to retain existing values for a boolean
> field
> > > > > > if a request.var was not present.
> >
> > > > > > However, I recognise that some people may consider returning
> > > > > > fieldname=OFF a contravention of protocol - does anyone feel like
> > > > > > that?
> >
> > > > > > FYI the solution is to add a hidden "off" checkbox (value='off')
> for
> > > > > > each displayed checkbox (both with the same name) and when the
> normal
> > > > > > checkbox is clicked setting the "off checkbox appropriately so
> that
> > > > > > whatever the status of the normal checkbox either name=on or
> name=off
> > > > > > will be returned.
> >
> > > > > > Any thoughts gratefully received.
> >
> > > > > > On Nov 21, 8:13 am, billf <[EMAIL PROTECTED]> wrote:
> >
> > > > > > > If the following explanation is correct it is a big coincidence
> > > > > > > because I have just been looking at this behaviour.
> >
> > > > > > > When a form is submitted, if there is no parameter for a field
> then
> > > > > > > one of 2 things happen (simplified):
> >
> > > > > > > If it is NOT a checkable form control (checkable=check box or
> radio
> > > > > > > button) then the original form value is used. In the case of
> an
> > > > > > > existing record, this will be the value in the existing record.
> In the
> > > > > > > case of a new record then any defailt will be used.
> >
> > > > > > > If it IS a checkable form control then it is impossible to
> distinguish
> > > > > > > between a missing parameter and an unchecked control because
> CGI
> > > > > > > doesn't send "mycheckbox=off" - it just doesn't send anything.
> So to
> > > > > > > be able to set a boolean field to false, web2py must say
> > > > > > > missing==unchecked.
> >
> > > > > > > In your case, you set checkboxes on page2 and everything is
> fine.
> > > > > > > When you amend page 1 and submit, no checkboxes are present so
> web2py
> > > > > > > sets the associated fields to False. You go back to page 2 and,
> lo and
> > > > > > > behold, all the checkboxes are unchecked.
> >
> > > > > > > The only solution, given the current setup, is that any fields
> > > > > > > represented as checkable controls but not displayed in the
> current
> > > > > > > form must be set up in the form as "hidden" so that checked
> fields are
> > > > > > > returned even if they are not displayed.
> >
> > > > > > > I think it should be possible to create the "hidden" fields
> > > > > > > automatically in SQLFORM/FORM, although supporting "custom
> > > > > > > forms" (where a developer may not include a field that the
> standard
> > > > > > > SQLFORM would include) could be a complication.
> >
> > > > > > > On Nov 21, 6:20 am, "Wes James" <[EMAIL PROTECTED]> wrote:
> >
> > > > > > > > I have an app that on one page I have a set of fields (first
> 20 fields
> > > > > > > > of say 50) I have manually placed. All saves well and when I
> go to
> > > > > > > > another page and come back all is well.
> >
> > > > > > > > On a separate page, I edit the rest of these fields. Part of
> these
> > > > > > > > are check box fields and some others including textarea
> fields.
> >
> > > > > > > > When I save the data on this page - all is well.
> >
> > > > > > > > I then go back to the first page and make a change and save
> the data -
> > > > > > > > fine, but if I go back to the page with the check boxes, they
> are all
> > > > > > > > cleared out - I look in the DB in admin area and yes, they
> are all set
> > > > > > > > to False. But the textarea fields do not do this on this
> page - they
> > > > > > > > keep their data just fine.
> >
> > > > > > > > So I created a test page and made a controller like I already
> have:
> >
> > > > > > > > form=t2.create(db.student)
> > > > > > > > return dict(form=form)
> >
> > > > > > > > and then in a test.html do {{=form}
> >
> > > > > > > > I then save the page with a check box selected - fine - that
> works.
> >
> > > > > > > > I then go back to my first page and make a change and save.
> Go back
> > > > > > > > to the test page and the check box is cleared.
> >
> > > > > > > > Why is it doing this?
> >
> > > > > > > > thx,
> >
> > > > > > > > -wj
> >
>
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