I'm thinking of bean list panel that allows you to dynamically filter
on one or more attributes (for making very large tables manageable. I
wrote a list panel like this, but the data access assumes the Cayenne
flexibility of dynamically creating queries using Java. I'm not sure
Hibernate is quite as flexible, but I'd be glad to be wrong on that.)
A check-box in each row would allow you to bookmark instances. These
bookmarked instances could be put into a drop-down on the edit panels
of related objects.
Do we need ORM though? I think we should abstract that, and leave it up
to the user what ORM should be used, if any. That is, unless you'd like
to go the (T)Rails way. Ofcourse, a default implementation providing for
Cayenne would be cool.
I can send you an image of what I'm talking about (for the list
filtering). If you are interested, I can send you my list panel code
with the dynamic query-builder classes. I think I documented them
pretty well, at least at the class level. The columns in my list
panel are not generic yet (you still have to specify the individual
columns in the HTML) but the dynamic query builder code wouldn't
change much except to make it more generic for other persistence
mechanisms.
Sure, pls send me the pics :) How is your code licenced? If it could be
open source, we could just build on your project, right?
I really think it is possible to create a few well-crafted editing and
list panels (using the flexibility of OGNL, dynamic queries, and
modern ORM tools) that would allow relatively easy management of
almost any data schema. When I was a kid, my grandma taught me 3 or 4
chords on a ukelele. Those simple chords could be used to accompany
any song, she said. That made a big impression on me at the time. In
our case, though, the tricky part is to keep the panels relatively
simple without sacrificing critical features.
Yeah. I'm a guitar player, and allways am amazed that even bands like
Radiohead just need a few chords for really great songs :)
How would our project compare to Trails? Anything we could learn from
that? Or maybe even 'just' integrate?
Anyway, I think the main flexibility should cover the looks of the panel
and the ordering of fields. Furthermore, I think the BeanInfo like
pattern I used is usefull for breaking out of the default field
rendering. What do you think?
Would there be any reason to keep the basic, generic, BeanPanel and
BeanListPanel stuff in wicket-extensions, then have the uber-project
in wicket-stuff? Either way is fine with me.
Hmm. Dunno. Though it would be nice to have the beanpanel in its basic
form in extensions, I doubt it's usefullness. Editing of objects seems
to be an all or nothing thing to mee.
Eelco
- Jonathan Carlson
[EMAIL PROTECTED] 2005-07-12 2:21:36 AM >>>
Jonathan Carlson wrote:
I think you are right, it does get complex rather quickly.
I've played with having a tab panel for related objects. Mine sat
right below the edit form. It worked pretty well. One-to-many
relationship tabs have a pageable table of related instances.
One-to-one relationship tabs just have an editable form for the related
object. It makes for a larger page object, but it feels natural to me
to keep related stuff together on the same page.
Sounds good. Does that mean it's all page centric then? One of the
things I would really like, is that you could include the bean editor as
a Panel, that works regardless of what is more on your page.
One thing that would help is to be able to "bookmark" instances as you
browse them. These can be candidates for adding to a relationship (like
adding an employee to a manager, etc). Or just for speedier access to
the instances you use most frequently.
Great idea. Not sure how exactly that would look though.
I'm interested in helping out since I need to do this anyways, but I'd
probably push towards a more full-fledged project.
Cool. I think the smartest thing is to start a new project for it in
wicket-stuff. I'll try to start that up tonight.
Eelco
- Jonathan Carlson
[EMAIL PROTECTED] 2005-07-11 4:45:03 PM >>>
I've been thinking a bit more about the bean panel, and I'm kind of
stuck. That is, there's too many possibilities!
A simple bean is no problem. I have code in CVS for that now and it
works (with a special case, FieldPanel, which lets you select a subset
of the properties of the bean). The problem starts when you think about
the more complex properties. E.g. a Person object that has an Address
as
a property. Usually, you'd want to give the Address its own edit form.
But probably not in the same page as the Person form is (things would
get messy pretty quickly). So, say you'd want to navigate to address
edit from person edit. The current implementation I had was just a
bunch
of fields, no form, which has the advantage that you can decide to nest
it in any form you like. Also it had no buttons (cancel, save), just
the
fields. Thing is, that we need the form and the buttons if we'd want to
support the object browsing. And if we build that, we are allready
halfway a Trails application.
So, what do you guys think? What direction should the bean panel
experiment head? Who is interested in cooperating, and where should we
put it (in wicket-stuff, so that it can be a seperate full-fledged
project with more people working on it, or in extensions in case we
keep
it really simple)?
Eelco
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