It's a list:reference field then, look at the reference in chapter 6: the database abstraction layer
On Wednesday, February 6, 2013 2:09:50 PM UTC-7, brac...@gmail.com wrote: > > Hello, I was reading about the "Links to referencing > records<http://web2py.com/books/default/chapter/29/07>" > part in the online guide, but was confused how I would deal with custom > logic of inserting it to the database. The guide seems to already have the > values in the database to pull from. > > If we take the person and dog database in the example, a person can own > many dogs, but a dog can only have one owner. > > If we take the example one step further and say we're running an animal > shelter, we would have a list of people and a list of dogs, but we don't > have the connection between the two. If a person wants to adopt a dog, > they'll use a form which will have the following elements: > > Textfield for the person's name. > A list of checkboxes with the dog's name. > > Then upon successful form submission, the selected dogs are linked to a > person. > > I don't quite understand how the form is built using "form = > SQLFORM(db.person)" in this scenario. > > Since SQLFORM builds its own html, how would web2py handle the dog object? > By default, it will probably use a textfield because the dog has a String > name, but what about the owner reference? Furthermore, the dog has to be > treated as a boolean since we are simply asking if this dog should belong > to the human listed on the form or not. I can't quite picture how > "SQLFORM.widgets.boolean.widget" > since a dog isn't a boolean value tied to a person. It's its own entity > with a name and an owner. > > The only way I can think of to solve this is to NOT use SQLFORM, but > rather SQLFORM.factory(). Then I would use "{{=form.custom.begin/end}}" to > manually format the form, create the Textfield for the person name, and > generate the checkboxes in a for loop given the list of dog names. When the > form passes basic validation with form.accepted, I would grab the person's > id and update the entry for all dogs that are returned checked. > > Do I have the right idea or am I misunderstanding web2py design? Is there > an easier way to handle one-to-many relationships through a form? > > -- --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
