I'd put a warning saying "you have unsaved changes." or perhaps only allow
switching after saving. You could also make your own form, and handle
saving all changes with your controller. Web2py has good defaults, and the
helpers are good for getting a website up and running quickly, but when you
have custom logic needs, you should get your hands dirty by writing your
own code.
On Monday, April 9, 2012 6:19:32 AM UTC-7, Cliff wrote:
>
> Using the dog-owner model from the examples, you might have a model like
> this:
>
> db.define_table('dog', Field('dog_name'))
> db.define_table('owner', Field('owner_name'))
> db.define_table('dog_owner',
> Field('dog_id', db.dog),
> Field('owner_id', db.owner),
> Field('owner_plays_fetch_with_dog', 'boolean)
> )
>
> I like to use tabs to edit a relationship like this on one web page.
>
> I would use an SQLFORM or a crud form on the first tab to present the
> owner data for editing. This data gets processed in the normal way.
>
> I would put the dog data on a second tab, but use jquery ajax to handle
> changes. Maybe the dog's name changes, or the owner decides to start
> playing fetch-the-stick with the dog.
>
> The problem with this approach is that you can lose changes made on the
> owner page. If you, for example, need to edit both the owner's name and
> the dog's name, you might type the owner's new name on tab 1, move to tab 2
> and edit the dog's name, then close the page without going back to tab 1
> and clicking Submit.
>
> There are several possible solutions.
>
> - Put the owner and dog information on separate forms with submit buttons.
> They may or may not be on different tabs. The drawback is it takes a
> round trip to the server every time a user switches between dog information
> and owner information.
>
> - Use jquery/ajax on the owner page to record changes as they are made.
> If the user is making a lot of changes on a form, I'm not sure there is a
> good way to give feedback.
>
> - Use some kind of form-dirty javascript to remind the user to submit the
> form on the first tab if he tries to close the page while it still has
> unsaved changes.
>
> Which approach would you use, or would you handle this in a different way?
>
> Thank you.
>
