silverstripe-blog/code/extensions/BlogPostFilter.php

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<?php
/**
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* This is responsible for filtering only published posts to users who do not have permission to
* view non-published posts.
*
* @package silverstripe
* @subpackage blog
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*/
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class BlogPostFilter extends DataExtension {
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/**
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* Augment queries so that we don't fetch unpublished articles.
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*
* @param SQLQuery $query
*/
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public function augmentSQL(SQLQuery &$query) {
$stage = Versioned::current_stage();
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if($stage == 'Live' || !Permission::check('VIEW_DRAFT_CONTENT')) {
$query->addWhere(sprintf('PublishDate < \'%s\'', Convert::raw2sql(SS_Datetime::now())));
}
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}
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/**
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* This is a fix so that when we try to fetch subclasses of BlogPost, lazy loading includes the
* BlogPost table in its query. Leaving this table out means the default sort order column
* PublishDate causes an error.
*
* @see https://github.com/silverstripe/silverstripe-framework/issues/1682
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*
* @param SQLQuery $query
* @param mixed $dataQuery
* @param mixed $parent
*/
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public function augmentLoadLazyFields(SQLQuery &$query, &$dataQuery, $parent) {
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$dataQuery->innerJoin('BlogPost', 'SiteTree.ID = BlogPost.ID');
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}
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}