How to edit attribute of a selected shape?

[David Bitner]

Just a quick note.  PostGIS can make this type of operation very easy.
 Rather than trying to use mapscript, if you are trying to change the
attribute, you can just pass the feature id and an update SQL
statement using PHP's (or Perl, Ruby, Python....) PostgreSQL
functions.  I do this all the time and it works very well.

On 1/26/06, Xiaonan Zhang <xnzhang11 at gmail.com> wrote:
> hi, Skalski,
>
> Thanks for the reply. However could you please give more information on
> this. Maybe an example.
>
> The code was working partly ok, the new point can be added, however as I
> said, it will overwrite the old one. It's attribute was inherited from the
> old one. I now want to change it's attribute and when I use
> $poLayer->getResult(0); there seems not point was picked up.
>
> regards,
>
> Jonathan
>
>
>
>
> On 26/01/06, Skalski Artur - askals <Artur.Skalski at acxiom.com> wrote:
> >
> > To change an attribute of added point You have to also update a dbase file
> (I don't see that in your code) wihich stores all atributes of shapes in
> shp.file, otherwise you get nothing. And if you try to open such a file in
> ArcViwe it will promt taht tha file was damaged which is because dbf. file
> record number doesn't mach shp. file record number.
> > dbase.dll which is used to create and update dbf. file comes with standard
> distribution off all lates php binaries
> >
> > ragards
> >
> > Artur Skalski
> >
> > ACXIOM Polska
> > Telephone:      (+48 22) 606 11 27      Budynek Saturn
> > Facsimile:      (+48 22) 606 11 28      Domaniewska 41
> > Mobile:         (+48) 503 070 036       02-672 Warszawa
> > E-mail:         artur.skalski at acxiom.com
> >
> >
> > -----Original Message-----
> > From: UMN MapServer Users List [mailto: MAPSERVER-USERS at LISTS.UMN.EDU]On
> Behalf Of Xiaonan Zhang
> > Sent: Wednesday, January 25, 2006 6:02 PM
> > To: MAPSERVER-USERS at LISTS.UMN.EDU
> > Subject: [UMN_MAPSERVER-USERS] How to edit attribute of a selected shape?
> >
> >
> > Dear all,
> >
> > I am tring to create a function which can add comment point onto layer
> however I got a few problems here:
> > 1. the newly added one always overwrite the existing point so there is
> always only one point in that layer.
> > 2. I can not regain the added point.
> > 3. how to change the attribute of the added point, say there is one
> attribue called "Comment".
> >
> > thanks.
> >
> > My code is:
> >
> > //Create a new comment point
> >             $ClickGeo = ms_newPointObj();
> >             $ClickGeo->setXY($nClickGeoX, $nClickGeoY);
> >
> >             //printf("ClickGeoX %f<BR>\n",$nClickGeoX);
> >           //printf("ClickGeoY %f<BR>\n",$nClickGeoY);
> >
> >           //Add it to the comments layer
> >           $shape = ms_newShapeObj(MS_SHAPE_POINT);
> >           $line = ms_newLineObj();
> >           $line->add($oClickGeo);
> >           $shape ->add($line);
> >
> >
> >           $poLayer = $gpoMap->getlayerbyname(comments);
> //get the layer "comments"
> >           $poLayer->open();
> >           //printf("Layer Name: %f<BR>\n", $poLayer->name);
> >
> >
> >           $poLayer-> addfeature($shape); //add the new comment point
> >
> >
> >           //Save the changes
> >             $cmmShapefile = "../htdocs/data/comments";
> >           $objShapefile = ms_newShapeFileObj( $cmmShapefile, MS_SHP_POINT
> );
> >           $objShapefile->addshape($shape);
> >           $objShapefile->free;
> >            $poLayer->close();
> >
> >           //Task2: Use layer->querybypoint to regain the newly added point
> and then change it's comment attribut
> >
> >           //Task2.1:get the new added comment point
> >                  $poLayer->querybypoint($oClickGeo,
> MS_SINGLE, 2);
> >                  $numResults = $poLayer->getNumResults();
> >                  printf("Find point: %f<BR>\n", $numResults);
>
> >                  $oRes = $poLayer->getResult(0);
> >                  printf("tileindex: %f<BR>\n", $oRes->tileindex);
> >                  printf("SHAPEINDEX: %f<BR>\n", $oRes->shapeindex);
>
> >                 $oShape = $poLayer->getShape(-1,0); //(-1,-1)
> >                 print_r($oShape->values); //print the keys of the values
> array
> >                 $comment = $oShape->Values["Comment"];
> >                 printf("The comment attribute is ---: %f<BR>\n",$comment
> ); //display comment attribute
> >
> >
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