Get fetched result in different arrays by joined tables - php

Question

I would like to make a Post object containing an instance of its associated table User and the easiest would be if I could access user results and post results separately.
The query:
$query = $this->connection->newQuery()->from('post');
$query->select(
[
'post.message',
'post.created_at',
'user.name',
'user.email',
'user.role',
'user.status',
]
)->join(['table' => 'user', 'conditions' => 'post.user_id = user.id']);
$postsRows = $query->execute()->fetchAll('assoc');
The query above outputs an array of the result rows and I have no way to know if the column is from the user table or post table.
$postsRows = array (
0 =>
array (
'message' => 'This is a test post',
'created_at' => '2021-01-01 00:00:01',
'name' => 'Admin Example',
'email' => 'admin#example.com',
'role' => 'admin',
'status' => 'active',
),
1 =>
array (
'message' => 'This is another test post',
'created_at' => '2021-01-01 00:00:01',
'name' => 'User Example',
'email' => 'user#example.com',
'role' => 'user',
'status' => 'active',
),
)
Naturally I can make aliases for each column
$query = $this->connection->newQuery()->from('post');
$query->select(
[
'post.*',
'user_name' => 'user.name',
'user_email' => 'user.email',
'user_role' => 'user.role',
'user_status' => 'user.status',
]
)->join(['table' => 'user', 'conditions' => 'post.user_id = user.id']);
$postsRows = $query->execute()->fetchAll('assoc');
But then I have to go through them and split the array manually later, I can't alias the post column names as I use the expression * and it won't work when joining the same table.
I guess what would be ideal would be the following output. Is something like this possible?
$postsRows = array(
0 => array(
'post' => array(
'message' => 'This is a test post',
'created_at' => '2021-01-01 00:00:01',
),
'user' => array(
'name' => 'Admin Example',
'email' => 'admin#example.com',
'role' => 'admin',
'status' => 'active',
)
),
1 => array(
'post' => array(
'message' => 'This is another test post',
'created_at' => '2021-01-01 00:00:01',
),
'user' => array(
'name' => 'User Example',
'email' => 'user#example.com',
'role' => 'user',
'status' => 'active',
),
),
)

Answer 1

As discussed here, the workflow that interests me is more "use case" based, and then it doesn't make sense to do what I requested (as it would kind of be reinventing ORM which I did first).
What works out for me is creating specific DTOs with high cohesion like UserPost in which case the origin of the table is not relevant as fields are selected individually, precisely.