Response not rendered in S scope??

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Jeppe Nejsum Madsen

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Sep 13, 2011, 4:59:15 AM9/13/11
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Hi

I'm using some CSS transforms that generates a NodeSeq with embedded
{S.?()} calls. This seems to fail when the ? method is called, see
stacktrace at the end.

It looks like the rendering is done outside the scope of S? Is this
intentional? I can workaround by forcing the evaluation of the {}
sections by adding this:

val errorMessages:List[NodeSeq] = errorMessages2.map{ns =>
Unparsed(ns.toString)}

but it doesn't feel right :-)

/Jeppe

java.lang.IllegalStateException: Attempted to use resource bundles
outside of an initialized S scope. S only usable when initialized,
such as during request processing. Did you call S.? from Boot?
at net.liftweb.http.S$class.resourceBundles(S.scala:902)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.S$.resourceBundles(S.scala:48)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.S$class.resourceBundles(S.scala:878)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.S$.resourceBundles(S.scala:48)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.S$class.$qmark(S.scala:928)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.S$.$qmark(S.scala:48)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.mapper.MappedEnumString._valueToDisplayString(MappedEnumString.scala:57)
~[bin/:2.4-M4]
at net.liftweb.mapper.MappedEnumString.toString(MappedEnumString.scala:58)
~[bin/:2.4-M4]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:189)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
~[scala-library-2.9.1.jar:na]
at scala.collection.immutable.List.foreach(List.scala:45)
~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$3.apply(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
~[scala-library-2.9.1.jar:na]
at scala.collection.immutable.List.foreach(List.scala:45)
~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:279)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$1.apply(HtmlParser.scala:215)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5Writer$$anonfun$write$1.apply(HtmlParser.scala:214)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at scala.collection.Iterator$class.foreach(Iterator.scala:660)
~[scala-library-2.9.1.jar:na]
at scala.collection.LinearSeqLike$$anon$1.foreach(LinearSeqLike.scala:50)
~[scala-library-2.9.1.jar:na]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
~[scala-library-2.9.1.jar:na]
at scala.xml.NodeSeq.foreach(NodeSeq.scala:43) ~[scala-library-2.9.1.jar:na]
at net.liftweb.util.Html5Writer$class.write(HtmlParser.scala:214)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Html5$.write(HtmlParser.scala:30)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.Html5Properties$$anonfun$htmlWriter$2.apply(HtmlProperties.scala:335)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.Html5Properties$$anonfun$htmlWriter$2.apply(HtmlProperties.scala:335)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.NodeResponse$class.toResponse(LiftResponse.scala:571)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.XhtmlResponse.toResponse(LiftResponse.scala:635)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.XhtmlResponse.toResponse(LiftResponse.scala:635)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.LiftServlet.sendResponse(LiftServlet.scala:673)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.LiftServlet.doService(LiftServlet.scala:309)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.LiftServlet$$anonfun$doIt$1$1.apply(LiftServlet.scala:132)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.LiftServlet$$anonfun$doIt$1$1.apply(LiftServlet.scala:131)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.TimeHelpers$class.calcTime(TimeHelpers.scala:344)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Helpers$.calcTime(Helpers.scala:34)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.TimeHelpers$class.logTime(TimeHelpers.scala:363)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.Helpers$.logTime(Helpers.scala:34)
~[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.LiftServlet.doIt$1(LiftServlet.scala:131)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.LiftServlet.service(LiftServlet.scala:142)
~[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2$$anonfun$apply$mcV$sp$1.apply$mcV$sp(HTTPProvider.scala:71)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2$$anonfun$apply$mcV$sp$1.apply(HTTPProvider.scala:70)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2$$anonfun$apply$mcV$sp$1.apply(HTTPProvider.scala:70)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.URLRewriter$.doWith(Req.scala:1244)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2.apply$mcV$sp(HTTPProvider.scala:69)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2.apply(HTTPProvider.scala:69)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2.apply(HTTPProvider.scala:69)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.HTTPProvider$class.service(HTTPProvider.scala:65)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.LiftFilter.service(LiftServlet.scala:757)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(ServletFilterProvider.scala:67)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1$$anonfun$apply$mcV$sp$1.apply(ServletFilterProvider.scala:62)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1$$anonfun$apply$mcV$sp$1.apply(ServletFilterProvider.scala:62)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$16$$anonfun$apply$17$$anonfun$apply$18$$anonfun$apply$19.apply(Vars.scala:619)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$16$$anonfun$apply$17$$anonfun$apply$18.apply(Vars.scala:618)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$16$$anonfun$apply$17.apply(Vars.scala:617)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$16.apply(Vars.scala:616)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$class.apply(Vars.scala:615)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.RequestVarHandler$.apply(Vars.scala:515)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1.apply(ServletFilterProvider.scala:61)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1.apply(ServletFilterProvider.scala:61)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$16$$anonfun$apply$17$$anonfun$apply$18$$anonfun$apply$19.apply(Vars.scala:619)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$16$$anonfun$apply$17$$anonfun$apply$18.apply(Vars.scala:618)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$16$$anonfun$apply$17.apply(Vars.scala:617)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$16.apply(Vars.scala:616)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71)
[lift-util_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.CoreRequestVarHandler$class.apply(Vars.scala:615)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.provider.servlet.ServletFilterProvider$class.doFilter(ServletFilterProvider.scala:60)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at net.liftweb.http.LiftFilter.doFilter(LiftServlet.scala:757)
[lift-webkit_2.9.1-2.4-M4.jar:2.4-M4]
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.handler.ContextHandler.__handle(ContextHandler.java:765)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.Server.handle(Server.java:326) [jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:943)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
[jetty-6.1.25.jar:6.1.25]
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
[jetty-util-6.1.25.jar:6.1.25]

David Pollak

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Sep 13, 2011, 11:39:57 AM9/13/11
to lif...@googlegroups.com
This is EPFL changing the XML semantics.

What version of Lift and Scala are you using?


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Jeppe Nejsum Madsen

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Sep 13, 2011, 12:02:59 PM9/13/11
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This is with lift-webkit_2.9.1-2.4-M4.jar:2.4-M4

Note this is new code so it may always have worked like this. I was
just a little surprised. I cannot easily extract an example atm, but
it does involve the stuff mentioned here:

http://groups.google.com/group/liftweb/browse_frm/thread/7d9ba4955b55d16/bd6bf945536a1ed0

I've briefly tried a repl session in 2.8.1 and 2.9.1 and they both
seem to lazily evaluate {} sections:

Welcome to Scala version 2.8.1.final (Java HotSpot(TM) 64-Bit Server
VM, Java 1.6.0_26).
Type in expressions to have them evaluated.
Type :help for more information.

scala> def f = {println("in f"); "f"}
f: java.lang.String

scala> def g = <a>{f}</a>
g: scala.xml.Elem

scala> g
in f
res0: scala.xml.Elem = <a>f</a>

Welcome to Scala version 2.9.1.final (Java HotSpot(TM) 64-Bit Server
VM, Java 1.6.0_26).
Type in expressions to have them evaluated.
Type :help for more information.

scala> def f = {println("in f"); "f"}
f: java.lang.String

scala> def g = <a>{f}</a>
g: scala.xml.Elem

scala> g
in f
res0: scala.xml.Elem = <a>f</a>

/Jeppe

David Pollak

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Sep 13, 2011, 12:30:02 PM9/13/11
to lif...@googlegroups.com
Okay... so somehow we need to force the NodeSeq to be strict when the CSS Selector Transform is applied.  Any clues as to how to do that?

Jeppe Nejsum Madsen

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Sep 14, 2011, 5:02:21 AM9/14/11
to lif...@googlegroups.com
On Tue, Sep 13, 2011 at 6:30 PM, David Pollak
<feeder.of...@gmail.com> wrote:
> Okay... so somehow we need to force the NodeSeq to be strict when the CSS
> Selector Transform is applied.  Any clues as to how to do that?

So, I did a little digging and it seems it's a general problem, not
just with CSS transforms.

Otoh, it happens only in special cases and since I guess this hasn't
caused problems so far maybe it's not worth to pursue.

The problem is the toString call that is made on an expression in the
{} block. This happens outside the scope of S. So essentially I had
something like this:

class Foo {
override def toString = S.?("Hi foo")
}

Now, if my snippet returns this:

def render = <h2>{new Foo}</h2>

The NodeSeq contains a reference to a Foo object and will eventually
call toString on this object (outside the S context)

If I instead modify the snippet:

def render = <h2>{(new Foo).toString}</h2>

It seems the {} expressions are evaluated when touching the NodeSeq,
but the toString is not made until needed:

scala> class Foo {println("New foo");override def toString =
{println("toString"); "Foo"}}
defined class Foo

scala> def x = <a>{new Foo}</a>
x: scala.xml.Elem

scala> x.length
New foo
res27: Int = 1

scala> x
New foo
toString
res28: scala.xml.Elem = <a>Foo</a>

scala> def y = <a>{(new Foo).toString}</a>
y: scala.xml.Elem

scala> y.length
New foo
toString
res30: Int = 1

scala> y
New foo
toString
res31: scala.xml.Elem = <a>Foo</a>

/Jeppe

Andreas Joseph Krogh

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Sep 14, 2011, 7:25:43 AM9/14/11
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Unless I'm misinterpreting what you're writing, I don't see how this is different from normal programming where code-blocks which reference stuff are passed by reference to other contexts for execution. For example, if one references a lazy-loaded object (think JPA, which needs a transaction for loading the lazy-field) in a closure and the one executing the closure is not withing the same transaction, it'll blow up saying something like "org.hibernate.LazyInitializationException: could not initialize proxy - no Session". This typically happens in comet-actors where the NodeSeq=>NodeSeq is executed in a thread originating from a custom thread-pool and not the web-container's http-thread-pool.

I just think this is one of those issues one as a programmer must know about and be aware of. It's no framework's fault.

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Jeppe Nejsum Madsen

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Sep 14, 2011, 7:43:54 AM9/14/11
to lif...@googlegroups.com
On Wed, Sep 14, 2011 at 1:25 PM, Andreas Joseph Krogh
<and...@officenet.no> wrote:

[...]

> Unless I'm misinterpreting what you're writing, I don't see how this is different from normal programming where code-blocks which reference stuff are passed by reference to other contexts for execution. For example, if one references a lazy-loaded object (think JPA, which needs a transaction for loading the lazy-field) in a closure and the one executing the closure is not withing the same transaction, it'll blow up saying something like "org.hibernate.LazyInitializationException: could not initialize proxy - no Session". This typically happens in comet-actors where the NodeSeq=>NodeSeq is executed in a thread originating from a custom thread-pool and not the web-container's http-thread-pool.
>
> I just think this is one of those issues one as a programmer must know about and be aware of. It's no framework's fault.

I don't think we disagree. I was just surprised that the final
transformation of NodeSeq=>OutputStream was happening outside the
scope of the S context that generated the NodeSeq to begin with, even
if in the same thread, request etc.

And if we can minimize the issues one as a programmer must know about
an be aware of, I think we're making the world a better place :-)

/Jeppe

Andreas Joseph Krogh

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Sep 14, 2011, 7:57:08 AM9/14/11
to lif...@googlegroups.com

I totally agree!

David Pollak

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Sep 14, 2011, 1:04:20 PM9/14/11
to lif...@googlegroups.com
On Wed, Sep 14, 2011 at 12:43 PM, Jeppe Nejsum Madsen <je...@ingolfs.dk> wrote:
On Wed, Sep 14, 2011 at 1:25 PM, Andreas Joseph Krogh
<and...@officenet.no> wrote:

[...]

> Unless I'm misinterpreting what you're writing, I don't see how this is different from normal programming where code-blocks which reference stuff are passed by reference to other contexts for execution. For example, if one references a lazy-loaded object (think JPA, which needs a transaction for loading the lazy-field) in a closure and the one executing the closure is not withing the same transaction, it'll blow up saying something like "org.hibernate.LazyInitializationException: could not initialize proxy - no Session". This typically happens in comet-actors where the NodeSeq=>NodeSeq is executed in a thread originating from a custom thread-pool and not the web-container's http-thread-pool.
>
> I just think this is one of those issues one as a programmer must know about and be aware of. It's no framework's fault.

I don't think we disagree. I was just surprised that the final
transformation of NodeSeq=>OutputStream was happening outside the
scope of the S context that generated the NodeSeq to begin with, even
if in the same thread, request etc.

It would require a ton of rework of the Lift request/response pipeline to force the rendering of the bytestream in a different place and it may introduce more problems than it solves.

However, I can force text nodes to be strictly evaluated during one of the DOM passes and that should fix the problem.  Please open a ticket and I'll take care of it.
 

And if we can minimize the issues one as a programmer must know about
an be aware of, I think we're making the world a better place :-)

/Jeppe
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Jeppe Nejsum Madsen

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Sep 14, 2011, 1:33:10 PM9/14/11
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I've added a low-priority ticket
https://www.assembla.com/spaces/liftweb/tickets/1113-xml-interpolation-in-nodeseq-does-not-have-access-to-the-s-context

/Jeppe

David Pollak

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Sep 14, 2011, 2:08:23 PM9/14/11
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I have the code written... will check in later tonight

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