Add multiple rows in Laravel DB Query (for migrating WordPress usermeta table into new Laravel table) - sql

Question

I'm migrating Users from WordPress to Laravel. I want to join the users and user_meta tables. Then I will import into a new table.
In my user_meta table I have multiple rows assigned to the user_id. How do I import multiple rows with their own unique identifier.
Eg.
umeta_id = 1, user_id = 1, meta_key = first_name, meta_value = Bob
umeta_id = 2, user_id = 1, meta_key = last_name, meta_value = Builder
In the above example, I'd like to add first_name and last_name to the query output.
Then import into a new column in the Laravel DB (and stop using the user_meta reference table approach WordPress uses).
Here is my current query code and the output I get:
$wp_users = DB::connection('wordpress_db')
// ->select(DB::raw('um.meta_value as first_name'))
->select('um.meta_value as first_name')
->table('wp_users')
->leftJoin('wp_usermeta as um', function ($q) {
$q->on('um.user_id', '=', 'wp_users.id')
->where('um.meta_key', '=', "first_name");
})
->orderBy('wp_users.id');
and if i dump the output:
+"ID": 1
+"user_login": "123"
+"user_pass": "123"
+"user_nicename": "123"
+"user_email": "b#x"
+"user_url": "https://x"
+"user_registered": "2016-1-1 13:47:32"
+"user_activation_key": ""
+"user_status": 0
+"display_name": "Bobby Builds"
+"umeta_id": 222
+"user_id": 1
+"meta_key": "first_name"
+"meta_value": "Bob"
Rather than meta_value and meta_key I just want 'first_name' => 'bob' and then also the ability to do this for multiple values in the user_meta reference table
If I was writing RAW sql then I think I would approach this by having a left_join per value I want to get. I would then create an alias like
SELECT um1.meta_value as first_name
SELECT um2.meta_value as last_name
LEFTJOIN wp_usermeta as um1
LEFTJOIN wp_usermeta as um2
I've noodled around without luck - any ideas appreciated.
Thanks!
I've written about some of the processes involved here for further reference: http://raison.co/migrating-wordpress-users-to-laravel/

Answer 1

I did this in the end by using select to choose all columns from wp_users and then selectively adding the new joins.
See the code fixed code below:
$wp_users = DB::connection('wp_db')
->table('wp_users')
->leftJoin('wp_usermeta as um', function ($q) {
$q->on('um.user_id', '=', 'wp_users.id')
->where('um.meta_key', '=', "wbp_user_mob_phone");
})
->leftJoin('wp_usermeta as um2', function ($q) {
$q->on('um2.user_id', '=', 'wp_users.id')
->where('um2.meta_key', '=', "first_name");
})
->select('wp_users.*', 'um.meta_value as wbp_user_mob_phone', 'um2.meta_value as first_name')
->orderBy('wp_users.id');