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Posted to users@wicket.apache.org by Ned Collyer <ne...@gmail.com> on 2008/01/21 10:47:48 UTC
Link to last version of a page of a given type/class.
Hi,
I may be overlooking something, however I am having a bit of trouble linking
to the last current version of a page unless I use the method outlined by
igor, which isn't practical for what I am trying to achieve (see his method
below from
http://www.nabble.com/pageMap-question---td13541168.html#a13554232)
igor.vaynberg wrote:
>
> for scenarios like those simply pass the page instance to another page
>
> class secondsteppage extends webpage {
> public secondsteppage(page first) {
> add(new link("go-back") { onclick() { setresponsepage(first); }});
> }
> }
>
> -igor
>
For example, say I have a page of search criteria (the form is in a reusable
panel), and its filled and i navigate around a bit. The next time I come to
the search criteria page, I want it to remember the last search (ie, return
the last version of the search criteria page).
I have been able to do this in a rudimentary way by passing the page
instance of the search criteria page through to the constructor of the
destination page via a forms onSubmit().
This means I can then call the
setResponsePage(searchPage.getVersion(Page.LATEST_VERSION)); on the onClick
of a link in the destination page.
However this will only work from the destination page - not if i navigate
around to other pages. Without specifying a version a new instance is
being created.
(ie PageLink(SearchPage.class) creates a new SearchPage instance).
Surely there is a way of retrieving the latest existing version of a page
given a class type. I've trawled google and the examples and api - I'm
feeling stupid - like i've missed something obvious, or inadvertently broken
the expected behaviour.
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Re: Link to last version of a page of a given type/class.
Posted by Johan Compagner <jc...@gmail.com>.
Wicket does maintain state, but what you want is something different
and currently not supported. We dont have 'static' pages for a
specific page class. You are in full control.
About pag.getversion those methods shouldnt be used by users of wicket
at all. If you want something like this because you dont want to keep
references to the pages itself use session.getPage method
On 1/21/08, Ned Collyer <ne...@gmail.com> wrote:
>
> Hi Johan,
>
> Thank you for the reply.
>
> This suggestion will work, but it seems like something that the framework
> should do automatically. The whole "maintaining" state thing is meant to
> maintain state between requests without the extra dev overhead of manually
> plugging stuff into, and pulling out of, the session. I'm happy to get a
> new instance of the page if its been cleansed from the session - thats not a
> problem, but I was under the impression that wicket should already be
> maintaining this state - I just need a link generated.
>
> I find it a bit bizarre that methods like Page.getVersion(int num) exist,
> but because its not static.. i need an instance of the page to retrieve a
> previously versioned instances of the page. (rather than
> Page.getVersion(Class clazz, int version)).
>
> Does wicket not support linking to the last version of a given class type?
> If not, I would find this quite useful.
>
> Something like
>
> new PageLink("search-criteria-link", SearchCriteriaPage.class,
> Page.LATEST_VERSION)
>
> Would be exactly what I'm after. (I'm still optimistic that this feature
> exists and its me being stupid not able to find it. ;))
>
>
> Rgds
>
> Ned
>
>
> Johan Compagner wrote:
> >
> > Just remember in a simple valuesholder class the page id and pagmap
> > for a page (and version if you want that) and then ask through the
> > session for that page. If many pages (or big pages) are created in
> > between, it could return nothing.. Depending on the size of the
> > diskpage session/pagmap file.
> >
>
> --
> View this message in context:
> http://www.nabble.com/Link-to-last-version-of-a-page-of-a-given-type-class.-tp14994042p14994505.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
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Re: Link to last version of a page of a given type/class.
Posted by Ned Collyer <ne...@gmail.com>.
Hi Johan,
Thank you for the reply.
This suggestion will work, but it seems like something that the framework
should do automatically. The whole "maintaining" state thing is meant to
maintain state between requests without the extra dev overhead of manually
plugging stuff into, and pulling out of, the session. I'm happy to get a
new instance of the page if its been cleansed from the session - thats not a
problem, but I was under the impression that wicket should already be
maintaining this state - I just need a link generated.
I find it a bit bizarre that methods like Page.getVersion(int num) exist,
but because its not static.. i need an instance of the page to retrieve a
previously versioned instances of the page. (rather than
Page.getVersion(Class clazz, int version)).
Does wicket not support linking to the last version of a given class type?
If not, I would find this quite useful.
Something like
new PageLink("search-criteria-link", SearchCriteriaPage.class,
Page.LATEST_VERSION)
Would be exactly what I'm after. (I'm still optimistic that this feature
exists and its me being stupid not able to find it. ;))
Rgds
Ned
Johan Compagner wrote:
>
> Just remember in a simple valuesholder class the page id and pagmap
> for a page (and version if you want that) and then ask through the
> session for that page. If many pages (or big pages) are created in
> between, it could return nothing.. Depending on the size of the
> diskpage session/pagmap file.
>
--
View this message in context: http://www.nabble.com/Link-to-last-version-of-a-page-of-a-given-type-class.-tp14994042p14994505.html
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Re: Link to last version of a page of a given type/class.
Posted by Johan Compagner <jc...@gmail.com>.
Just remember in a simple valuesholder class the page id and pagmap
for a page (and version if you want that) and then ask through the
session for that page. If many pages (or big pages) are created in
between, it could return nothing.. Depending on the size of the
diskpage session/pagmap file.
On 1/21/08, Ned Collyer <ne...@gmail.com> wrote:
>
> Hi,
>
> I may be overlooking something, however I am having a bit of trouble linking
> to the last current version of a page unless I use the method outlined by
> igor, which isn't practical for what I am trying to achieve (see his method
> below from
> http://www.nabble.com/pageMap-question---td13541168.html#a13554232)
>
>
> igor.vaynberg wrote:
> >
> > for scenarios like those simply pass the page instance to another page
> >
> > class secondsteppage extends webpage {
> > public secondsteppage(page first) {
> > add(new link("go-back") { onclick() { setresponsepage(first); }});
> > }
> > }
> >
> > -igor
> >
>
> For example, say I have a page of search criteria (the form is in a reusable
> panel), and its filled and i navigate around a bit. The next time I come to
> the search criteria page, I want it to remember the last search (ie, return
> the last version of the search criteria page).
>
> I have been able to do this in a rudimentary way by passing the page
> instance of the search criteria page through to the constructor of the
> destination page via a forms onSubmit().
>
> This means I can then call the
> setResponsePage(searchPage.getVersion(Page.LATEST_VERSION)); on the onClick
> of a link in the destination page.
>
> However this will only work from the destination page - not if i navigate
> around to other pages. Without specifying a version a new instance is
> being created.
>
> (ie PageLink(SearchPage.class) creates a new SearchPage instance).
>
> Surely there is a way of retrieving the latest existing version of a page
> given a class type. I've trawled google and the examples and api - I'm
> feeling stupid - like i've missed something obvious, or inadvertently broken
> the expected behaviour.
> --
> View this message in context:
> http://www.nabble.com/Link-to-last-version-of-a-page-of-a-given-type-class.-tp14994042p14994042.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
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