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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