Symfony 2 finding blog posts for multiple users - php

Question

I have 3 tables: user, user_followers and blog_posts.
Users can follow other users and users are related to blog_post by user_id.
I need to get all blog posts that people I follow have written.
I tried something like:
$followedUsers = $user->getFollowedByMe(); //This one works
$posts = $entityManager->getRepository('<BundleHere>:BlogPosts')
->findBy(array('user_id' => $followedUsers));
And I tried a lot more variations but can't figure it out. Maybe someone knows a better way to search by multiple objects not just one.

Answer 1

You can use this kind of code in your BlogRepository.php in example.
public function getBlogPost($userId)
{
return $this
->_em
->createQueryBuilder('p')
->leftJoin('p.user', 'u')
->where('u.id = :id')
->setParameter('id', $userId)
->getQuery()
->getResult();
}
createQueryBuilder('p') will automatically create the select and from (select entity (post ?) from table).
Then, you can use it like this :
$posts = $entityManager->getRepository('<BundleHere>:BlogPosts')->getBlogPost($userId);
I can't give you the exact query because we don't have enough informations about your entities. But this way, you can write nice queries to get exactly what you want.

Answer 2

You can do:
$posts = $entityManager->getRepository('<BundleHere>:BlogPosts')
->createQueryBuilder('b')
->whereIn('b.user', $followedUsers)
->getQuery()
->getResult();
'user' should be the name of property used to hold the user in the Blogpost object.

Answer 3

So i figured it out (thanx guys for pointing me in the right direction with queryBuilder).
$followedByMe = $user->getFollowedByMe(); //Getting users i follow
$followedIds = $followedByMe
->map(function( $obj ) { //Using map method to create an array of id's for all followers
return $obj->getId(); //Value to put into array (in this case id)
})->toArray(); //Create an array and assign it to $followedIds variable
$qb = $em->getRepository('<BundleHere>:BlogPosts')->createQueryBuilder('b');
$posts = $qb->where($qb->expr()->in('b.user', $followedIds ))
->orWhere('b.user = :my_id')->setParameter('my_id', $user->getId()) //Get my posts too
->getQuery()
->getResult();