Re: Customising D2W - adding filtering to list pages
Re: Customising D2W - adding filtering to list pages
- Subject: Re: Customising D2W - adding filtering to list pages
- From: Mark Wardle <email@hidden>
- Date: Mon, 2 Nov 2009 22:23:15 +0000
Hi Daniel,
I might be able to answer that!
I see in the source for ERD2WListPage that it creates a displaygroup
first checking the key "useBatchingDisplayGroup". I suspect that if
you set that key then the list page will properly batch your entities
rather than simply paginate.
I hope that is what will happen as I will have need to use that soon....
Best wishes,
Mark
2009/11/2 Daniel Beatty <email@hidden>:
> Greetings Ramsey,
> Got a follow up question for you. Is there a way to have D2W use a
> throttle back mechanism for queries that would otherwise overwhelm the
> server? For example, I am building a D2W app for a database schema that
> was badly designed, and some queries, especially wild card, will overrun the
> memory quickly. Thus in those cases, something like the old Display
> Groups mechanism for limiting results to the first 100 or so would be nice.
> Is there such a thing, and how do I use it?
> Thank you,
> Dan
> On Nov 1, 2009, at 3:45 PM, Ramsey Lee Gurley wrote:
>
> On Nov 1, 2009, at 6:37 PM, Ramsey Lee Gurley wrote:
>
> Hi Mark,
>
> If you're starting with ERNeu then you could always display the result list
> embedded in your query page with the showListInSamePage d2w key. That way,
> your search results simply load embedded in your query page and if you'd
> like to add/update query parameters, they're right there.
>
> However, if you want something simpler like a query any field in your batch
> navigation bar, look at the ERNeu list page. There is a
> ERDFilterDisplayGroupButton wrapped by the nav bar. That could easily be
> updated in your subclassed list template to use a switch component and a
> custom search component like a query any field instead.
>
> Or if you prefer to stick to ERNeu, you could update ERNeuListPage component
> locally to use a switch component that defaults to a
> ERDFilterDisplayGroupButton. Give it a sensible d2wKey binding name if one
> doesn't exist in ERD2W already ... filterDisplayGroupComponentName or
> something. Then file a jira and have it updated in Wonder at some point in
> the future :-) I think the current filter component is impossible to enable
> anyway, so someone needs to add a allowsFiltering =
> d2wContext.allowsFiltering; binding, at the very least.
>
> I went ahead and jira'ed the allowsFiltering binding so it wouldn't be
> forgotten.
>
> http://issues.objectstyle.org/jira/browse/WONDER-384
>
>
> Ramsey
>
>
> On Nov 1, 2009, at 6:05 PM, Mark Wardle wrote:
>
> Apologies for all the posts on D2W. After watching David's
>
> presentation on D2W and buying the book suggested on his blog, I have
>
> rediscovered D2W and am very happily deleting lots of components and
>
> replacing them with (more powerful) D2W components. I've created a
>
> custom look subclassed from ERNeutralLook and am busy recreating lots
>
> of custom components in D2W. So thank you all for making it available.
>
> I'm using Project Wonder obviously.
>
> My old components used a display group and I usually added a filter
>
> search box that allowed users to filter down the displayed list -
>
> essentially creating a custom qualifier and applying it to the display
>
> group.
>
> I'd prefer not to make this a three step process from the list page
>
> (1. Click on a query button, 2. Set query parameters, 3. get results),
>
> but instead have a search box adjacent to my D2W list that I can use
>
> to build queries on.
>
> I wondered whether I should customise my D2W list page and embed a
>
> ERDAnyField - but this results in "Attempt to insert null key into an
>
> com.webobjects.foundation.NSMutableDictionary." as clearly the
>
> queryAttributes binding is not being set and
>
> stringAttributeListForEntityNamed is returning a null value.
>
> Then I thought: this isn't the D2W "way". Do I instead add a fake
>
> aboveDisplayPropertyKey and get that key displayed using a
>
> D2WQueryAnyField and then somehow bind it to the right displaygroup
>
> and a submit button?
>
> Any pointers would be much appreciated. I'm sure I'm making this more
>
> complicated than I need to....
>
> Many thanks,
>
> Mark
>
> --
>
> Dr. Mark Wardle
>
> Specialist registrar, Neurology
>
> Cardiff, UK
>
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>
> Dan Beatty, M.S. CS (B.S. EECS)
> Ph.D. Student
> Texas Tech University
> email@hidden
> http://venus.cs.ttu.edu/~dabeatty
> http://web.me.com/danielbeatty/My_Home_Page/Welcome.html
>
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--
Dr. Mark Wardle
Specialist registrar, Neurology
Cardiff, UK
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