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Subject: RE: CForms Binding - Cross Referenced Data (duplicate of post on
 users)
Date: Sun, 13 Mar 2005 20:25:50 +0100
Message-ID: <329A68716B57D54E8D39FD3F8A4A84DF016A4508@um-mail0136.unimaas.nl>
Thread-Topic: CForms Binding - Cross Referenced Data (duplicate of post on
 users)
Thread-Index: AcUn7z57O7u7KcBtTqG8Pj8VUIIxWQABFyOwAAM9XlAAAGvWEA==
From: "Linden H van der (MI)" <H.vanderLinden@MI.unimaas.nl>
To: <dev@cocoon.apache.org>, <ben_pope@hotmail.com>

You could make a multipage form if necessary.

Also have a look at the samples in the forms block. I think the
dreamteam sample and the dynamic repeater sample demonstrate what you
are looking for.

HTH.

Bye, Helma


> -----Original Message-----
> From: Ben Pope [mailto:ben_pope@REMOVE_MEhotmail.com]=20
> Sent: Sunday, 13 March 2005 20:22
> To: dev@cocoon.apache.org
> Subject: RE: CForms Binding - Cross Referenced Data=20
> (duplicate of post on users)
>=20
>=20
> Linden H van der (MI) wrote:
> > Hi,
> >=20
> > Just a quick response.=20
> >=20
> > What you describe here are two entities: rooms and persons.=20
> > It is much more common sense to treat them separately, i.e. a=20
> > list for editing persons (just a repeater) and a list for=20
> > editing rooms (simple list?) and finally, maybe a doubleList=20
> > for adding persons to a room.
>=20
> Quite possibly, but I'm recreating some paper forms and want=20
> the user to be
> able to enter the information as quicky as possible using my system.
>=20
> Essentially all the peoples names and ids are predefined=20
> (there will no
> doubt be a form to enter those people, too), but can be=20
> modified at any
> point.  More fields will be added to the people using this=20
> form (lets say;
> age, height, favourite colour).
>=20
> Unfortunately it has to be done this way.
>=20
> Thanks for your reply.
>=20
>=20
> Does anybody know how I can use fb:javascript (or flow, if=20
> not) to grab each
> id specified in the repeater and replace people elements=20
> inside of the room
> with the appropriate idrefs?
>=20
> Cheers,
>=20
> Ben Pope
>=20
>=20
>=20
>=20
>=20
> > > -----Original Message-----
> > > From: Ben Pope [mailto:ben_pope@REMOVE_MEhotmail.com]
> > > Sent: Sunday, 13 March 2005 18:12
> > > To: dev@cocoon.apache.org
> > > Subject: CForms Binding - Cross Referenced Data (duplicate=20
> > of post on=20
> > > users)
> > >=20
> > >=20
> > > Hi,
> > >=20
> > > First of, sorry for the post here, but I've asked a few=20
> > times on users=20
> > > and not had this solved, so I'm gonna cross my fingers and=20
> > post here:
> > >=20
> > > This is something I've been struggling with, on and off,=20
> > for some time=20
> > > now.
> > >=20
> > > Assume I have some data as follows:
> > >=20
> > > <project>
> > >    <people>
> > >       <person id=3D"0">
> > >          <name>Me</name>
> > >       </person>
> > >       <person id=3D"1">
> > >          <name>You</name>
> > >       </person>
> > >       <person id=3D"2">
> > >          <name>Him</name>
> > >       </person>
> > >    </people>
> > >    <rooms>
> > >       <room id=3D"0">
> > >          <name>Lounge</name>
> > >          <person idref=3D"0"/>
> > >          <person idref=3D"1"/>
> > >       </room>
> > >       <room id=3D"1">
> > >          <name>Kitchen</name>
> > >          <person idref=3D"2"/>
> > >       </room>
> > >    </rooms>
> > > </project>
> > >=20
> > > That describes a list of people which are in a particular=20
> > room, so Me=20
> > > and You are in the Lounge and Him is in the Kitchen.
> > >=20
> > > I want to have a form that displays, for a given room, a=20
> > list of the=20
> > > people in it.
> > >=20
> > > A repeater is obviously the first choice, but there are a few=20
> > > counter-intuitive thingsd going on:
> > >=20
> > > I need to be able to modify the name of the person. =20
> Simply running=20
> > > the repeater over the rooms is not enough.
> > >=20
> > > Adding a row needs to add an rooms/room/person with an idref
> > > - I'll then use
> > > client side javascript and XMLHTTP to allow the user to select a=20
> > > person (by
> > > id) to fit in the space, as all the people are predefined. =20
> > I do not=20
> > > want to have the repeater add /people/persons.
> > >=20
> > > I've toyed with a few ideas:
> > >=20
> > > id is passed in as a parameter, and this code is actually in a=20
> > > stylesheet - but ignore that for now.
> > >=20
> > > <fb:repeater id=3D"people"=20
> > parent-path=3D"/project/rooms/room[@id=3D{$id}]"
> > > =
row-path=3D"/project/people/person[@id=3D/project/rooms/room[@id=3D{
> > > $id}]/person/@
> > > idref]">
> > >=20
> > > This "solution" has the result of being perfect for load. =20
> > > However, when I
> > > save it, it breaks, because I can't have an xpath predicate. =20
> > > So what do I
> > > set the row-path-insert to?
> > >=20
> > > If I set row-path-insert=3D"/project/people/person" and bind the =
id=20
> > > (which is
> > > fb:identity) in both directions, /project/people/ ends up=20
> > correct, but=20
> > > /project/rooms/room/ doesn't get updated.
> > >=20
> > > I've tried
> > >       <fb:on-insert-row>
> > >          <fb:context path=3D"/project/rooms/room[@id=3D'0']">
> > >             <fb:insert-node>   <person idref=3D"5"/>
> > >       </fb:insert-node>
> > >=20
> > > But then I get a new node in both /rooms/room[@id=3D'0']/ which is =

> > > correct, and another node created in /project/people/=20
> which is the=20
> > > usual binding for person and is a copy of the existing one.  This=20
> > > doesn't seem correct to me.
> > >=20
> > > Hmm, I've had a little play with fb:javascript but I don't=20
> > know what=20
> > > I'm doing... Ideally I would remove all the=20
> > > /rooms/room[@id=3D'x']/person fields and repopulate with the=20
> > list of ids=20
> > > in the repeater.  I can't seem to work out the correct=20
> > APIs, it always=20
> > > says that such and such method doesn't exist
> > > - can anybody point me in the right direction?
> > >=20
> > > I've toyed with the idea of having two repeaters, and=20
> updating one=20
> > > from the other but it sounds like a recipe for disaster.
> > >=20
> > > Another idea was to have a play around with it in flow, but=20
> > I suspect=20
> > > I'd end up with exactly the same problems I have using=20
> > fb:javascript,=20
> > > with the disadvantage of distributing the binding code.
> > >=20
> > > Any help is much appreciated, I'm confused by the number=20
> of options=20
> > > and multitude of interfaces.
> > >=20
> > > I can't be the only person working with cross-referenced=20
> data!  I'm=20
> > > either missing something or the repeater just doesn't=20
> > understand this=20
> > > construct - I wonder if Sylvain has any ideas on this.
> > >=20
> > > I also started writing my own Repeater (well I copied the=20
> existing=20
> > > one, renamed it, changed some of it's parameters and=20
> managed to get=20
> > > Cforms to use it), but running through with eclipse in debug mode=20
> > > doesn't really throw any light on the subject - it's all=20
> > too confusing=20
> > > for me.
> > >=20
> > > Heeeelp!
> > >=20
> > > Ben
> > >=20
> >=20
>=20