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Hi all,
i just migrated from EE 2.5.X to 2.6.1 and i have some issues.
I just figured out that the problem using an orderby parameter in php 5.3 was actually a bug

http://ellislab.com/forums/viewthread/235099/

Now i have to struggle with this:

i had and embed tag inside a reverse_related_entries one

{embed="group/view" entry_id="{entry_id}”}

migration script didn’t change this tag, but obviously i wanted inside the value from parents tag, non from channel:entries outside.

So i changed in:
{embed="group/view" entry_id="{parents:entry_id}”}

and a receive a lot of:

A PHP Error was encountered
Severity: Notice
Message: Undefined offset: 0
Filename: relationship_parser/Tree_builder.php

Line Number: 402
A PHP Error was encountered
Severity: Warning
Message: array_keys() expects parameter 1 to be array, null given

Filename: relationship_parser/Tree_builder.php
Line Number: 402
A PHP Error was encountered
Severity: Warning

Message: Invalid argument supplied for foreach()
Filename: relationship_parser/Tree_builder.php

Line Number: 413

I searched a lot about this topic but no results…

I’m having this same issue. Did you find a solution?

I’m having this same issue. Did you find a solution?

inside
libraries/relationship_parser/Tree_builder.php

i changed line 402

$field_ids = array_keys($leaves[$depth]);

in

$field_ids = isset($leaves[$depth])? array_keys($leaves[$depth]):array();