[Zope] dynamic form checkbox data
J Cameron Cooper
Mon, 10 Mar 2003 14:04:21 -0600
>I have a form which has (dynamically-generated)
>checkboxes (from database rows).
>these are of the form:
><input type=checkbox name="ismember:list:string"
>(some do not default to checked).
>When I'm processing the form data, the list contains
>data for only those that are checked (i.e. no list if
>none are checked, a short list if some are checked).
That's a tricky issue with web programming in general: a form will only
report a value for a check box when it is checked, and otherwise will
ignore it. There are two common ways out:
1) drop the checkbox and use radio buttons (or perhaps some other
widget), which will guarantee a return value.
1b) add a hidden field for each question, and count an affirmative only
when you get the hidden field and the interactive checkbox's value.
2) somehow know server-side what your questions would have been and
compare the returned "affirmative" responses.
Number 2 is more work, but better with regards to security (you can't
trust users to exclusively use your form) and allows you to keep your
existing aesthetic (as opposed to #1).
I suppose there's also some monkey business you could do with