How would I code this MySQL query in Laravel Eloquent? - php

Question

I'm trying to work with a semi-complex query (by my standards, anyway) but I can't think how to do it using the query builder or using eloquent relationships.
My relationships table is: user_id_1 | user_id_2 | status | action_user_id in the case of friends, action_user_id can be ignored and status = 1. There is only one row per relationship so if you want to select all relationships that belong to User 17 then you need to check both user_id_1 and user_id_2 because the id could be in either column. I followed the database structure from here: http://www.codedodle.com/2015/03/social-network-friends-relationship.html
The sort of query I'm trying to perform is:
SELECT users.*
FROM users
LEFT JOIN users_relationships AS r
ON (
users.id = r.user_id_1
AND r.user_id_1 != $user_id
) OR (
users.id = r.user_id_2
AND r.user_id_2 != $user_id
)
WHERE r.status = 1
AND (
r.user_id_1 = $user_id
OR r.user_id_2 = $user_id
)
Such a thing would be best in an eloquent relationship so it would be easy to perform: $user->friends and it would return the results of the above but I'm stuck in all directions.
My best attempt unfortunately not using relationship is this:
User::with('profile')->join('user_relationships as r', function($join) use ($user_id) {
$join->on(DB::raw('( users.id = r.user_id_1 AND r.user_id_1 != ? )', [$user_id]), DB::raw(''), DB::raw(''));
$join->orOn(DB::raw('( users.id = r.user_id_2 AND r.user_id_2 != ? )', [$user_id]), DB::raw(''), DB::raw(''));
})
->where('r.status', 1)
->where(function($query) use ($user_id) {
$query->where('r.user_id_1', $user_id)
->orWhere('r.user_id_2', $user_id);
})
->get(['users.*']);
This however gives me errors relating to the parameters:
SQLSTATE[HY093]: Invalid parameter number (SQL: select `users`.* from `users` inner join `user_relationships` as `r` on ( users.id = r.user_id_1 AND r.user_id_1 != 1 ) or ( users.id = r.user_id_2 AND r.user_id_2 != 30 ) where `users`.`deleted_at` is null and `r`.`status` = 30 and (`r`.`user_id_1` = ? or `r`.`user_id_2` = ?))
I'm not sure how to do what I want to do.

Answer 1

The problem is here:
DB::raw('( users.id = r.user_id_1 AND r.user_id_1 != ? )', [$user_id])
DB::raw() doesn't take a second parameter for bindings. Use ->on()->where() instead (thanks to user4621032):
->leftJoin('users_relationships AS r', function($join) use($user_id) {
$join->on('users.id','=','r.users_id_1')->where('r.users_id_1','!=',$user_id)
->orOn('users_id','=','r.users_id_2')->where('r.users_id_2','!=',$user_id);
})
So to setup your ->friends() function as desired, you can use:
public function friends()
{
$user_id = $this->id;
return self::with('profile')
->leftJoin('users_relationships AS r', function($join) use($user_id) {
$join->on('users.id','=','r.users_id_1')->where('r.users_id_1','!=',$user_id)
->orOn('users_id','=','r.users_id_2')->where('r.users_id_2','!=',$user_id);
})
->where('r.status', 1)
->where(function($query) use ($user_id) {
$query->where('r.user_id_1', $user_id)
->orWhere('r.user_id_2', $user_id);
})
->get(['users.*']);
}

Answer 2

might be like this
DB::table('users')
->leftJoin('users_relationships AS r', function($join) use($user_id){
$join->on('users.id','=','r.users_id_1')->where('r.users_id_1','!=',$user_id)
->orOn('users_id','=','r.users_id_2')->where('r.users_id_2','!=',$user_id);
})
->where('r.status',1)
->where('r.user_id_1','=',$user_id)
->orWhere('r.user_id_2','=',$user_id)
->get();