Laravel Eloquent Select CASE? - sql

Question

Is there anyone with experience in PHP & Laravel Eloquent who can help me resolve this statement? I'm trying to inject a CASE... WHEN.. END... inside a raw() method. It seemed like it was completely ignored. The existing documentation hasn't been . I've tried several different things to no prevail. I'm trying to pull this off:
SELECT shares.id, ...,
CASE WHEN users.id = <CurrentUser> THEN 1 ELSE 0 END AS is_user,
...
FROM <table>
...
The source code is below:
$shares = Share::where('shares.status', '=', SHARE_STATUS_APPROVED)
->where('shares.deleted', '=', '0')
->where('locations.lat', '<=', $nelat)
->where('locations.lat', '>=', $swlat)
->where('locations.lng', '>=', $nelng)
->where('locations.lng', '<=', $swlng)
->where('users.id', '=', $user)
->orWhere('shares.connected_user_id', '=', $user)
->join('users', 'shares.user_id', '=', 'users.id')
->join('locations', 'locations.id', '=', 'users.location_id')
->join('provinces', 'provinces.id', '=', 'locations.province_id')
->join('countries', 'countries.id', '=', 'locations.country_id')
->select('shares.id AS share_id', 'users.id AS user_id', 'shares.connected_user_id', 'shares.original_language_id', 'shares.image',
'users.first_name', 'users.last_name', 'users.email',
'locations.city', 'provinces.name', 'countries.code',
'locations.lat', 'locations.lng',
'shares.created_at')
->raw('(CASE WHEN users.id = ' . $user . ' THEN 1 ELSE 0 END) AS is_user')
->orderBy('shares.created_at', 'desc')
->orderBy('users.id', 'asc')
->orderBy('shares.connected_user_id', 'asc')
->get();

Answer 1

Move your raw() call inside the SELECT statement:
->select('shares.id AS share_id', 'users.id AS user_id', 'shares.connected_user_id',
'shares.original_language_id', 'shares.image',
'users.first_name', 'users.last_name', 'users.email',
'locations.city', 'provinces.name', 'countries.code',
'locations.lat', 'locations.lng',
'shares.created_at',
DB::raw('(CASE WHEN users.id = ' . $user . ' THEN 1 ELSE 0 END) AS is_user')
)
->orderBy('shares.created_at', 'desc')
From: https://laravel.com/docs/5.4/queries#raw-expressions

Answer 2

Alternatively you can use selectRaw instead.
->selectRaw("shares.id AS share_id, users.id AS user_id ,
shares.connected_user_id ,
shares.original_language_id, shares.image,
users.first_name, users.last_name, users.email,
locations.city, provinces.name, countries.code,
locations.lat, locations.lng,
shares.created_at,
(CASE WHEN users.id = {$user} THEN 1 ELSE 0 END) AS is_user)")
->orderBy('shares.created_at', 'desc')

Answer 3

Just recently I have created a package that adds CASE support for Eloquent Query Builder. You can check it out here: https://github.com/aglipanci/laravel-eloquent-case
Using the package you can do this:
use App\Models\Invoice;
use AgliPanci\LaravelCase\Query\CaseBuilder;
$invoices = Invoice::query()
->case(function (CaseBuilder $case) {
$case->when('balance', '<', 0)->then('Overpaid')
->when('balance', 0)->then('Paid')
->else('Balance Due');
}, 'payment_status')
->get();