jqGrid treegrid ignores expanded state when provided xml data

Question

I have this problem, treegrid in jqGrid ignores the last option (expanded node or not) when passing data through xml. Anyone encountered this? Is there a solution? Maybe its my data? Here is a sample data that produces the problem:

<rows>
    <page>1</page>
    <total>0</total>
    <records>4</records>
    <row id='2'>
            <cell>2</cell>
            <cell>Parent</cell>
            <cell>0</cell>
            <cell>NULL</cell>
            <cell>false</cell>
            <cell>true</cell>
          </row>
    <row id='1'>
            <cell>1</cell>
            <cell>Child 1</cell>
            <cell>1</cell>
            <cell>2</cell>
            <cell>true</cell>
            <cell>false</cell>
          </row>
    <row id='3'>
            <cell>3</cell>
            <cell>Child 2</cell>
            <cell>1</cell>
            <cell>2</cell>
            <cell>true</cell>
            <cell>false</cell>
          </row>
    <row id='4'>
            <cell>4</cell>
            <cell>Child 3</cell>
            <cell>1</cell>
            <cell>2</cell>
            <cell>true</cell>
            <cell>false</cell>
          </row>
</rows>

Answer 1

It seems for me more as a bug in TreeGrid. Nevertheless you can easy fix the problem by adding loaded: true property to the node which need be expanded. The reason in the line of code and some above lines (see here) where loaded property (and ldat[loaded]) will be undefined and so the ldat[expanded] will be changed to undefined for all items having no loaded defined.

The demo demonstrate the solution. It uses XML which you posted but with additional <cell>true</cell> added at the end of definition of "Parent" item:

...
<row id='2'>
    <cell>2</cell>
    <cell>Parent</cell>
    <cell>0</cell>
    <cell>NULL</cell>
    <cell>false</cell>
    <cell>true</cell>
    <cell>true</cell> <!-- added the element for loaded: true -->
</row>
...

UPDATED: I think that the most easy way to fix the bug (originally described here) will be to change the line of code setTreeNode

ldat[expanded] = ((ldat[expanded] == "true" || ldat[expanded] === true) ? true : false) &&
    ldat[loaded];

to the following

ldat[expanded] = ((ldat[expanded] == "true" || ldat[expanded] === true) ? true : false) &&
    (ldat[loaded] || ldat[loaded] === undefined);

See the corresponding demo used the fixed code.