How to get parent document id

24 Posts

wayne.yellow Reply #1, 16 years, 10 months ago

Hi,

Could anyone please kindly tell me how to get the document ID? Example as below:

My Document Tree:
ROOT >> MainMenu-01
ROOT >> MainMenu-02
ROOT >> MainMenu-03 >> SubMenu-03 >> LastMenu-03

What I want to do is when I select "LastMenu-03" I would like to get the document ID of "MainMenu-03"
I manage to get the parent ID of "LastMenu-03" i.e. "SubMenu-03" document ID but my coding (I tried do while loop) does not allow me to get the "MainMenu-03" document ID.

Thanks and regards,
Wayne.

24 Posts

wayne.yellow Reply #2, 16 years, 10 months ago

Hi,

I managed to solve the problem, here is the code:

//<?php
$selectedId = $modx->documentIdentifier; /* Check selected document id */
$parentId = $modx->getParent($selectedId,1,'id');  /* Check if selected document has parent */

if ($parentId == "") { // If selected document does not have parent or parent level = root
  echo "[[Wayfinder? &startId=`$selectedId` &level=`2`]]";
} else {
  $currentParentId = $parentId[id];
  /* The while loop check if selected document has grandparents */
  while ($parentId[id] != "") {
    $parentId = $modx->getParent($parentId[id],1,'id');
    if ($parentId[id] != "") {
        $currentParentId = $parentId[id];
    }
  }
  echo "[[Wayfinder? &startId=`$currentParentId` &level=`2`]]";
}

3,975 Posts

Zaigham (aka zi) Reply #3, 16 years, 10 months ago

Check [[UltimateParent]] snippet (shipped in default evo install) it might be useful for you.

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24 Posts

wayne.yellow Reply #4, 16 years, 10 months ago

Hi Zi,

Thanks for letting me know about the [[UltimateParent]], it’s definitely more efficient than writing so many lines of code. However, I am not sure why it does not work when I tried below several methods except the last method:

1st Method - Not Working
I directly include in the Template as [[Wayfinder? &startId=`[!UltimateParent!]`]]
I echo [[UltimateParent]] and I can definitely obtain the parent (before ROOT level) of the document.

2nd Method - created a snippet Not Working
"subMenu" Snippet Code:
echo "[[Wayfinder? &startId=`[!UltimateParent!]`]]";
Call subMenu snippet in Template: [[subMenu]]

3rd Method - created a snippet Not Working
"subMenu" Snippet Code:
$parentId = [[UltimateParent]];
echo "[[Wayfinder? &startId=`$parentId`]]";
Call subMenu snippet in Template: [[subMenu]]

4th Method - created a snippet Working
"subMenu" Snippet Code:
$parentId = [[UltimateParent]];
echo $parentId;
echo "[[Wayfinder? &startId=`$parentId`]]";
Call subMenu snippet in Template: [[subMenu]]
But that will also print out the numeral of the parent ID.

Much appreciate if you could let me know what’s wrong with my first 3 methods coding.

Thanks and regards,
Wayne.

☆ A M B ☆
24,524 Posts

sottwell Reply #5, 16 years, 10 months ago

This has to do with how MODx handles cached and uncached snippets. If you nest snippets, the outer snippet must be uncached and the inner snippet cached.

[!Wayfinder? &startId=`[[UltimateParent]]`!]

MODx tags can’t be used in snippet code, PHP doesn’t understand them. Use

$modx->runSnippet('UltimateParent');

Your last method is (sort of) appearing to work because you actually echo the snippet tag, which MODx then parses.

http://www.sottwell.com/how-snippets-work.html

Studying MODX in the desert - http://sottwell.com
Tips and Tricks from the MODX Forums and Slack Channels - http://modxcookbook.com
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24 Posts

wayne.yellow Reply #6, 16 years, 10 months ago

Hi Sottwell,

Thank you so much for the reply. I tried it and it works perfectly fine. Also thanks for the URL and the explanation.

Regards,
Wayne.

5 Posts

badichan Reply #7, 12 years, 8 months ago

snippet (parent_title)
<?php
// created by Badichan Dmitriy (c) badichan.com
$page = $modx->getObject('modResource', $input);
$id = $page->get('parent');
$parent_page = $modx->getObject('modResource', $id);
echo $parent_page->get('pagetitle');
?>
chunk
[[!parent_title? &input=`[[*parent]]`]] [ed. note: badichan last edited this post 12 years, 8 months ago.]

5,888 Posts

Bruno17 Reply #8, 12 years, 8 months ago

try to use the snippet pdoField of the pdoTools - package or fastField, which is also included with pdoTools now.

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