How to use IdMemoize with partialUpdate?
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Dan Gravell
Jul 20, 2016, 7:00:54 AM7/20/16
to Lift
I have a page with search results, with the search results taking a while to query.
So in render I have something like:
".div-results" #> SHtml.idMemoize { outer => {
resultsDiv = Some(outer)
results.map(thumbnailCss)
}}
thumbnailCss is a function returning a CssSel.
That works if the results are already in. Now in my message handling I want something like:
resultsDiv.map(div => ???)
.foreach(thumbnailNodeSeq =>
partialUpdate(addResult(thumbnailNodeSeq))
)
}
In the place of ??? I tried:
thumbnailNodeSeq.apply(div.latestKids)
But that gave an AbstractMethodError!
Is there a way of doing this?
Dan
Matt Farmer
Jul 20, 2016, 9:26:20 AM7/20/16
to Lift
I don’t know about others, but I’m having a hard time picturing what you’re talking about.
Is there any chance you could set up a barebones example project or something I could look at so I can understand?
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Dan Gravell
Jul 20, 2016, 12:27:42 PM7/20/16
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Hmmm, sorry, thought this would be straightforward. I'll try to put something together tomorrow morning. To make sure I don't miss anything in the simplification process, which part of it don't you understand - the comet messaging bit, the initial render bit?
Diego Medina
Jul 20, 2016, 1:49:09 PM7/20/16
to Lift
Dan,
while you get the example ready, quick question, why are you using idMemoize? idMemoize is usually used when you want to refresh the content of the page using ajax, all at once.
If you want to use comet, just use comet, the render method on the comet does the initial rendering of the results page and then you can use partialUpdate to send the JsCmd that will add a new row of data.
If you go down this road, I tend to send json data for the new data and I trigger an event on the client side, then I write plain old js/jQuery on the client side to listen for that event, and then take the json and add it to the page.
Awhile ago I wrote a few posts that may help you, even though those were for Lift 2.5, they still work for 3.x
Hope that helps.
Diego
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Dan Gravell
Jul 21, 2016, 3:45:48 AM7/21/16
to Lift
I'm using idMemoize because I want to re-use the same portion of the template without repeating it.
Oh, hang on, I could just do a ".selector" #> ((ns:NodeSeq) => createCssSel) in the render(), capture ns and apply ns to createCssSel in the partialUpdate, couldn't I?
D'oh... talk about choosing the complicated path.
Dan
Dan Gravell
Jul 21, 2016, 5:14:59 AM7/21/16
to Lift
That worked, sorry for wasting everyone's time.
One point on API usage. In the render I found I had to do:
".div-results" #> ((ns:NodeSeq) => {
resultsDiv = Some(ns)
results.map(thumbnailCss).map(_.apply(ns))
})
I found I had to make the "apply" call because otherwise the compiler didn't like the RHS of the CssSel to be NodeSeq => List[CssSel] . So using apply changed it to NodeSeq => List[NodeSeq] which it liked. Hope that's ok, not sure if I can save some code there.
Dan
Diego Medina
Jul 22, 2016, 10:05:59 PM7/22/16
to Lift
Thanks for posting the working code!
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