Laravel scope with two relations - php

Question

I have a main table, "help_pages" which stores id's of either articles or videos. There are two other tables: "articles" and "videos."
In the example below, $portalType is either 'reseller' or 'global' for the purposes of my application. All was well as long as I didn't have a flag on videos to be unpublished. Now I'm having trouble filtering the scope function by BOTH articles and videos that are published.
This is in my models/HelpPage.php:
public function scopeByPortalType($query, $portalType) {
return $query->where('portal_type', '=', $portalType)
->leftjoin('articles', 'content_id', '=', 'articles.id')
->where('articles.published', '=', '1');
}
what I wish I could do is just add a second
->leftJoin('videos', 'content_id', '=', videos.id')
->where('videos.published', '=', '0');
but this returns too many rows. I tried creating a temp table with a UNION for both articles and videos:
CREATE TEMPORARY TABLE IF NOT EXISTS tmp_assets AS
(SELECT id, 'Article' AS content_type FROM articles WHERE published = 1)
UNION
(SELECT id, 'Video' AS content_type FROM videos WHERE published = 1)
and then joining that, but no dice. This might be a smaller deal than I'm making it, but I'm lost now!
Laravel version 4.2

Answer 1

Well, it's not pefect, but it does what I need it to do:
public function scopeByPortalType($query, $portalType) {
$q = $query
->whereRaw("
(id IN (SELECT help_pages.id FROM help_pages INNER JOIN articles ON content_id=articles.id WHERE articles.published='1' AND content_type='Article')
OR
id IN (SELECT help_pages.id FROM help_pages INNER JOIN videos ON content_id=videos.id WHERE videos.published='1' AND content_type='Video'))")
->where('portal_type', '=', $portalType);
return $q;
}
I wish I could've figured out a way to do it using actual Eloquent, but every step led me down a rabbit hole with a dead end. This worked!

Answer 2

The Eloquent way to do this would be setting up the relationships so you could utilize eager loading.
Relationships: http://laravel.com/docs/4.2/eloquent#relationships
Eager Loading: http://laravel.com/docs/4.2/eloquent#eager-loading
Setup relations:
class HelpPage extends Eloquent {
public function articles()
{
return $this->hasMany('Article');
}
public function videos()
{
return $this->hasMany('Video');
}
}
Then you can utilize eager loading like this:
$help_pages = HelpPage::with(array('articles' => function($query)
{
$query->where('published', '=', 1);
},
'videos' => function($query)
{
$query->where('published', '=', 1);
}
))->get();
You might be able to then leverage whereHas and orWhereHas on the actual query rather than my example above.