Laravel distinct on join one to many - php

Question

I've found a couple of questions online similar to mine, but I can't seem to find a working answer.
I have 2 tables
USER
ID | FIRSTNAME | EMAIL_ADDRESS
1 | Joe Bloggs | Joe#bloggs.com
STATUS
ID | USER_ID | STATUS | DATE
1 | 1 | 'In' | 2018-06-04 09:01:00
2 | 1 | 'Out' | 2018-06-04 09:00:00
I need to be able to Join the 2 tables together but only get the most recent status column by date, like this
ID | FIRSTNAME | EMAIL_ADDRESS | STATUS_ID | STATUS | DATE
1 | Joe Bloggs | Joe#bloggs.com | 1 | 'In' | 2018-06-04 09:01:00
I need to be able to run extra query builder arguments like where, because the user has the ability to pass in filters and search parameters if they require, so to be able to use the status table columns in my query builder, i'm doing a join like this
$users = Users::join('status', 'status.user_id', '=', 'user.id')->distinct('user.id');
Which then allows me to pass in any search parameters if I need them
if(!empty($request->search)){
$param = $request->search;
$users = $users->where(function($query) use ($param){
$query->where('users.firstname', 'like', '%'.$param.'%')
->orWhere('users.email_address', 'like', '%'.$param.'%');
});
}
if(!empty($request->dateFrom)){
if(!empty($request->dateTo)){
$users = $users->whereRaw('DATE(status.date) BETWEEN ? AND ?', [$request->dateFrom, $request->dateTo]);
} else {
$users = $users->whereRaw('DATE(status.date) BETWEEN ? AND DATE(NOW())', [$request->dateFrom]);
}
}
Then run my get() at the end
if($method == 'paginate'){
$users = $users->paginate(10);
} else {
$users = $users->get();
}
This returns the following
ID | FIRSTNAME | EMAIL_ADDRESS | STATUS_ID | STATUS | DATE
1 | Joe Bloggs | Joe#bloggs.com | 1 | 'In' | 2018-06-04 09:01:00
2 | Joe Bloggs | Joe#bloggs.com | 1 | 'Out' | 2018-06-04 09:00:00
I need to be able to use the foreign table columns as arguments in my Where functions, but I need to only return 1 row per user. How do I run a join, but only return 1 row for each of my users?

Answer 1

To get latest record for each user you can use a self join for status table
select u.*,s.*
from user u
join status s on u.id = s.user_id
left join status s1 on s.user_id = s1.user_id
and s.date < s1.date
where s1.user_id is null
Using query builder you might rewrite it as
DB::table('user as u')
->select('u.*', 's.*')
->join('status as s', 'u.id ', '=', 's.user_id')
->leftJoin('status as s1', function ($join) {
$join->on('s.user_id', '=', 's1.user_id')
->whereRaw(DB::raw('s.date < s1.date'));
})
->whereNull('s1.user_id')
->get();
Laravel Eloquent select all rows with max created_at
Laravel - Get the last entry of each UID type
Laravel Eloquent group by most recent record

Answer 2

Since you are using Laravel lets make the solution a bit more understandable and easier:
First Lets create the models for each table:
class User extends Model
{
public $timestamps = false;
protected $fillable = [
'FIRSTNAME',
'EMAIL_ADDRESS'
];
public function status(){
return $this->hasMany(\App\Status::class);
}
}
Now lets create the Status Model:
class Status extends Model
{
public $timestamps = false;
protected $casts = [
'USER_ID' => 'int',
];
protected $fillable = [
'USER_ID',
'STATUS',
'DATE'
];
public function user()
{
return $this->belongsTo(\App\User::class);
}
}
Now you can use Eloquents like this:
$result=User::whereHas('Status', function($q){
$q->where('date', $current_date);
})->distinct('id')->get();
Hope it Helps!