silverstripe-blog/code/extensions/BlogPostFilter.php

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<?php
/**
* This is responsible for filtering only published posts to users who do not have permission to
* view non-published posts.
*
* @package silverstripe
* @subpackage blog
*/
class BlogPostFilter extends DataExtension
{
/**
* Augment queries so that we don't fetch unpublished articles.
*
* @param SQLQuery $query
*/
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public function augmentSQL(SQLSelect $query, DataQuery $dataQuery = null)
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{
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$stage = Versioned::get_stage();
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if (Controller::curr() instanceof LeftAndMain) {
return;
}
if ($stage == 'Live' || !Permission::check('VIEW_DRAFT_CONTENT')) {
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$query->addWhere(sprintf(
'"PublishDate" < \'%s\'',
Convert::raw2sql(SS_Datetime::now())
));
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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
*
* @param SQLQuery $query
* @param mixed $dataQuery
* @param mixed $parent
*/
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public function augmentLoadLazyFields(
SQLSelect &$query,
DataQuery &$dataQuery = null,
$dataObject
) {
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$dataQuery->innerJoin('BlogPost', '"SiteTree"."ID" = "BlogPost"."ID"');
}
}