Callbacks cannot edit non-user editable fields

Cross posting from the forum....

I made a test database with two fields, one user editable (field_51), one not (field_52). They're both text fields with no filtering, no formatting.

# more hooks/database_callback_7.php 
<?php

class database_callback_7
{
	protected $registry;
	protected $DB;
	protected $settings;
	protected $request;
	protected $lang;
	protected $member;
	protected $memberData;
	protected $caches;
	protected $cache;

	public function __construct( $registry )
	{
		$this->registry		= $registry;
		$this->DB		= $this->registry->DB();
		$this->settings		=& $this->registry->fetchSettings();
		$this->request		=& $this->registry->fetchRequest();
		$this->lang		= $this->registry->getClass('class_localization');
		$this->member		= $this->registry->member();
		$this->memberData	=& $this->registry->member()->fetchMemberData();
		$this->cache		= $this->registry->cache();
		$this->caches		=& $this->registry->cache()->fetchCaches();
	}
	
	public function startUp()
	{
	}

	public function preSave()
	{
		echo "This is in preSave() before any changes have been made!<BR>";
		print_r($this->request);
		$this->request['field_51'] = "I like traffic lights";
		$this->request['field_52'] = "But only when they're green";

		echo "<BR><BR>This is in preSave() after changes have been made!<BR>";
		print_r($this->request);
	}

	public function postSave()
	{
		echo "<BR><BR>This is in postSave()!<BR>";
		print_r($this->request);

		$record = $this->DB->buildAndFetch(
							 array( 'select' => 'field_51, field_52', 
								'from'   => 'ccs_custom_database_7',
						 		'order'  => 'primary_id_field desc',
								'limit'  =>  1 )
			  			  );

		echo "<BR><BR>But this is what's in the database!<BR>";
		print_r($record);
		die();
	}
}

?>

This is in preSave() before any changes have been made!
Array ( [app] => ccs [module] => pages [section] => pages [id] => 7 [do] => save [record] => [post_key] => e29fc01e3e3dfa873c54f24144794a9f [field_51] => oh bother [dosubmit] => Save [request_method] => post ) 

This is in preSave() after changes have been made!
Array ( [app] => ccs [module] => pages [section] => pages [id] => 7 [do] => save [record] => [post_key] => e29fc01e3e3dfa873c54f24144794a9f [field_51] => I like traffic lights [dosubmit] => Save [request_method] => post [field_52] => But only when they're green ) 

This is in postSave()!
Array ( [app] => ccs [module] => pages [section] => pages [id] => 7 [do] => save [record] => [post_key] => e29fc01e3e3dfa873c54f24144794a9f [field_51] => I like traffic lights [dosubmit] => Save [request_method] => post [field_52] => But only when they're green ) 

But this is what's in the database!
Array ( [field_51] => I like traffic lights [field_52] => )

This is in preSave() before any changes have been made!
Array ( [app] => ccs [module] => pages [section] => pages [id] => 8 [do] => save [record] => [post_key] => e29fc01e3e3dfa873c54f24144794a9f [field_51] => oh bother [dosubmit] => Save [request_method] => post ) 

This is in preSave() after changes have been made!
Array ( [app] => ccs [module] => pages [section] => pages [id] => 8 [do] => save [record] => [post_key] => e29fc01e3e3dfa873c54f24144794a9f [field_51] => I like traffic lights [dosubmit] => Save [request_method] => post [field_52] => But only when they're green ) 

This is in postSave()!
Array ( [app] => ccs [module] => pages [section] => pages [id] => 8 [do] => save [record] => [post_key] => e29fc01e3e3dfa873c54f24144794a9f [field_51] => I like traffic lights [dosubmit] => Save [request_method] => post [field_52] => But only when they're green ) 

But this is what's in the database!
Array ( [field_51] => I like traffic lights [field_52] => )

This is in preSave() before any changes have been made!
Array ( [app] => ccs [module] => pages [section] => pages [id] => 8 [do] => save [record] => [post_key] => e29fc01e3e3dfa873c54f24144794a9f [field_51] => oh bother [dosubmit] => Save [request_method] => post ) 

This is in preSave() after changes have been made!
Array ( [app] => ccs [module] => pages [section] => pages [id] => 8 [do] => save [record] => [post_key] => e29fc01e3e3dfa873c54f24144794a9f [field_51] => I like traffic lights [dosubmit] => Save [request_method] => post [field_52] => But only when they're green ) 

This is in postSave()!
Array ( [app] => ccs [module] => pages [section] => pages [id] => 8 [do] => save [record] => [post_key] => e29fc01e3e3dfa873c54f24144794a9f [field_51] => I like traffic lights [dosubmit] => Save [request_method] => post [field_52] => But only when they're green ) 

But this is what's in the database!
Array ( [field_51] => I like traffic lights [field_52] => But only when they're green )

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