Debug shows steps, but gridfield doesn't if author is not admin.

gistfile1.txt

Debug shows steps, but gridfield doesn't if author is not admin. I can open the step if I know the url though, but the gridfield says 'no items found'.

HowtoPage.php

<?php
class HowtoPage extends DocumentPage {

	public static $has_many = array(
		'Steps' => 'Step',
	);

	public function getCMSFields() {
		$fields = parent::getCMSFields();
		Debug::show($this->Steps()); // shows steps when exist
		$gf_config = GridFieldConfig::create()->addComponents(
			new GridFieldToolbarHeader(),
			new GridFieldAddNewButton('toolbar-header-right'),
			new GridFieldSortableHeader(),
			new GridFieldDataColumns(),
			new GridFieldEditButton(),
			new GridFieldDeleteAction(),
			new GridFieldDetailForm()
		);  
		$gridfield = new GridField("Steps", "Steps:", $this->Steps()->sort(array('SortOrder' => 'asc', 'ID'=>'asc')), $gf_config);
		$fields->insertAfter($gridfield, "Content"); // shows gridfield but with 'no items found'

		return $fields;
	}
}

Solution: add the following methods to the Step.php DataObject:

public function canView($member = null) {
return $this->HowtoPage()->canView($member);
}

public function canEdit($member = null) {
    return $this->HowtoPage()->canEdit($member);
}

public function canDelete($member = null) {
    return $this->HowtoPage()->canDelete($member);
}

public function canCreate($member = null) {
    return $this->HowtoPage()->canCreate($member);
}