XPath question regarding attributes and stepping

[sonny]

Hello,
I am running into a bit of a problem trying to represent data from a datasource (and render it in a grid) when I have an attribute on a node in XML...

Expected: What I want to do is to set a record (via recordXPath) at the 'lowest' level of a nested complex structure, and then specify data values (via valueXPath) up and down the XML tree, if you will.

Problem: The initial record item (lowest level node and attribute, e.g. @name) can be shown in a listGrid, however a complex valueXPath such as "../../element@name" does not return any values

example:

<streetList>
    <street name="Decker" type="asphalt">
        <symbolList>
            <symbol name="stop" type="standing sign"/>
            <symbol name="yield" type="standing sign"/>
        </symbolList>
        <streetDates sunset="2020" sunrise="1958">
     </street>
</streetList>

in my datasource, I have the recordXPath set to the lowest nested node, for example:

isc.DataSource.create({
    ID:"streets",
    recordXPath: "/streetList/street/symbolList/symbol",
    ...,
    fields: [
               {
                name:"SymbolName",
                valueXPath:"@name"
                },
               {
                name:"StreetName",
                valueXPath:"../../street@name"
                }
              ]
   ...

[Isomorphic]

Hi sonny,

That's not actually a valid XPath, you want:

               
            {
                name:"StreetName",
                valueXPath:"../../@name"
            }

Note the invalid XPath is reported as a warning in the Developer Console.

[sonny]

Thank you very much. Yes. I do now see that it was an invalid XPath!

A problem remains, however, for me to see into the attributes of a sibling node (or, rather, a parent's sibling in this case).

For example in my data above, if I wanted to return the value of the 'streetDates' node, 'sunset' attribute, I want to try something like:

   ...fields: [
               {
                name:"SymbolName",
                valueXPath:"@name"
                },
               {
                name:"StreetSunset",
                valueXPath:"../../streetDates@sunset"
                }
              ]...

...however it seems that this is not supported?

Thank you in advance!
Sonny

[Isomorphic]

Hi sonny,

That's another invalid XPath. Be sure to check the Developer Console as these are being reported as warnings. You want something like "../../streetDates/@sunset".

[sonny]

Yes indeed! Thank you again for the wonderful help!
Works now, just as you have written.