[web-devel] juliusFile in yesod 0.8 eating all memory

[Greg Weber]

As an alternative to orphan instances, given the recent refactoring it
should be easy to now make Julius (and Coffee) a separate package (with the
aeson dependency).

On Fri, Apr 29, 2011 at 7:45 AM, Michael Snoyman <michael at snoyman.com>wrote:

> On Fri, Apr 29, 2011 at 5:32 PM, JP Moresmau <jpmoresmau at gmail.com> wrote:
> > Right, found it.
> >
> >>>> instance (ToJSON a)=> ToJavascript a where
> >>>>       toJavascript =toJavascript . toJSON
> >
> > That used to work but now seems to go into an infinite loop. I've
> > replaced it by:
> >
> > instance (ToJSON a)=> ToJavascript a where
> >       toJavascript =fromLazyText . decodeUtf8  . encode . toJSON
>
> Unfortunately, that's the best we can do here, since Javascript only
> works with Text, and aeson only works with ByteString.
>
> > and everything works again. Not very elegant, have I missed something?
> > Shouldn't that instance be part of Yesod somewhere? I mean if we
> > standardize on Aeson, and we want variables in Javascript, it makes
> > sense to serialize ToJSON instances in a Julius template.
>
> Good catch, it's supposed to be in yesod-json, but it's commented out
> right now. It was probably part of the changeover from json-types to
> aeson and got forgotten. I'm not a huge fan of the placement of this
> instance (it *is* an orphan), but the alternative is adding aeson as a
> dependency to hamlet.
>
> Michael
>
> > JP
> >
> > On Fri, Apr 29, 2011 at 4:06 PM, JP Moresmau <jpmoresmau at gmail.com>
> wrote:
> >> juliusFile, I'm not running any scaffolded site, I've built everything
> >> with 1s and 0s. (-:
> >> Changing to juliusFileDebug results in the same behavior.
> >>
> >> JP
> >>
> >> On Fri, Apr 29, 2011 at 3:56 PM, Michael Snoyman <michael at snoyman.com>
> wrote:
> >>> Are you running juliusFile or juliusFileDebug? (The scaffolded site
> >>> uses the latter by default.)
> >>>
> >>> Michael
> >>>
> >>> On Fri, Apr 29, 2011 at 4:52 PM, JP Moresmau <jpmoresmau at gmail.com>
> wrote:
> >>>> Hi all,
> >>>>
> >>>> I've just upgraded to Yesod 0.8. I've changed all my Strings into
> >>>> Texts, and all my Data.JSON.Types into Data.Aeson.Types. I use these
> >>>> JSON objects in julius templates, by adding the orphan instance:
> >>>> instance (ToJSON a)=> ToJavascript a where
> >>>>       toJavascript =toJavascript . toJSON
> >>>>
> >>>> (Removing that instance causes compilation error, and I had it when I
> >>>> was using json-types).
> >>>> addJulius works fine when it contains Javascript code. However on one
> >>>> page I use juliusFile to load an external template. This eats all my
> >>>> memory and never returns under Warp when I launch the compiled exe (I
> >>>> see "thread killed" messages in the console, though), and in GHCi
> >>>> crashes with "out of memory".
> >>>> The code hasn't changed and was working fine in yesod 0.7 before the
> >>>> upgrade. If I remove juliusFile the page displays instantly.
> >>>>
> >>>> Any idea? I'm a bit stumped. I suppose I'm going to remove each of my
> >>>> variables in the julius file to narrow it down, but if anybody has any
> >>>> insight...
> >>>>
> >>>> Thanks!
> >>>>
> >>>> --
> >>>> JP Moresmau
> >>>> http://jpmoresmau.blogspot.com/
> >>>>
> >>>> _______________________________________________
> >>>> web-devel mailing list
> >>>> web-devel at haskell.org
> >>>> http://www.haskell.org/mailman/listinfo/web-devel
> >>>>
> >>>
> >>
> >>
> >>
> >> --
> >> JP Moresmau
> >> http://jpmoresmau.blogspot.com/
> >>
> >
> >
> >
> > --
> > JP Moresmau
> > http://jpmoresmau.blogspot.com/
> >
>
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> web-devel at haskell.org
> http://www.haskell.org/mailman/listinfo/web-devel
>
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