[mapserver-dev] RE: MapServer 6.0 Beta 1 - Expression Parser question

[Lime, Steve D (DNR)]

I think I will pursue an intermediate solution where we could allow simple substitution in a text string. That would reserve the logical syntax for times when more formatting is necessary. If one used quotation marks I think we could also detect attribute bindings and just substitute as before. That would still require change in mapfiles but it would be easy:

  TEXT ([item1], [item2]) would become TEXT "[item1], [item2]"

That's actually a cleaner syntax than before... I have to make sure it's feasible, but it should be an easy addition.

Steve
  
________________________________________
From: mapserver-dev-bounces at lists.osgeo.org [mapserver-dev-bounces at lists.osgeo.org] On Behalf Of Daniel Morissette [dmorissette at mapgears.com]
Sent: Thursday, March 10, 2011 10:17 PM
To: mapserver-dev at lists.osgeo.org
Subject: Re: [mapserver-dev] RE: MapServer 6.0 Beta 1 - Expression Parser       question

Hopefully the following should work as well, without the need for quotes
around attribute references, right?

   TEXT ( [LOCATION]+" "+[OBSERVED]+[UNITS] +"$"+[OBSTIME] )


On 11-03-10 06:21 PM, Lime, Steve D (DNR) wrote:
> This is expected. It's in the RFC and migration guide. We had to treat these
> like true expressions so various formatting functions could be introduced.
>
> Steve
>
> -----Original Message-----
> From: Smith, Michael ERDC-CRREL-NH [mailto:michael.smith at usace.army.mil]
> Sent: Thursday, March 10, 2011 5:18 PM
> To: mapserver-dev at lists.osgeo.org; Lime, Steve D (DNR)
> Subject: MapServer 6.0 Beta 1 - Expression Parser question
>
> Steve,
>
> To get the expression parser to label my layers as pre 6.0, I¹ve had to
> change my TEXT statement from
>
> TEXT ( [LOCATION] [OBSERVED] [UNITS]$[OBSTIME] )
>
> to
>
> TEXT ( "[LOCATION]"+" "+"[OBSERVED]"+"[UNITS]" +"$"+"[OBSTIME]" )
>
> And put quotes around the string fields. Is this expected behavior or is
> this a bug with the new expression parser?
>
> Mike
>
>


--
Daniel Morissette
http://www.mapgears.com/
Provider of Professional MapServer Support since 2000

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