How to log db queries in Lumen5.7? - php

Question

I upgrade Lumen from 5.4 to 5.7, and I want to be able to log DB queries for debugging.
Here's the conf/source code. I have to use 'LumenDB' alias because of naming conflict of a third-party library.
I expect the query could be logged, but I can not see them in lumen.log.
MyApplication.php
<?php
namespace App;
use Illuminate\Support\Facades\Facade;
use Monolog\Formatter\LineFormatter;
use Monolog\Handler\RotatingFileHandler;
use Monolog\Logger;
class MyApplication extends \Laravel\Lumen\Application {
public function withFacades($aliases = true, $userAliases = [])
{
Facade::setFacadeApplication($this);
if (! static::$aliasesRegistered) {
static::$aliasesRegistered = true;
class_alias('Illuminate\Support\Facades\Auth', 'Auth');
class_alias('Illuminate\Support\Facades\Cache', 'Cache');
class_alias('Illuminate\Support\Facades\DB', 'LumenDB');
class_alias('Illuminate\Support\Facades\Event', 'Event');
class_alias('Illuminate\Support\Facades\Gate', 'Gate');
class_alias('Illuminate\Support\Facades\Log', 'Log');
class_alias('Illuminate\Support\Facades\Queue', 'Queue');
class_alias('Illuminate\Support\Facades\Schema', 'Schema');
class_alias('Illuminate\Support\Facades\Validator', 'Validator');
}
}
protected function registerLogBindings()
{
$this->singleton('Psr\Log\LoggerInterface', function () {
return new Logger('lumen', $this->getMonologHandler());
});
}
protected function getMonologHandler()
{
$maxFiles = 7;
$rotatingLogHandler = new RotatingFileHandler(storage_path('logs/lumen.log'), $maxFiles);
$rotatingLogHandler->setFormatter(new LineFormatter(null, null, true, true));
$handlers = [];
$handlers[] = $rotatingLogHandler;
return $handlers;
}
}
bootstrap/app.php
$app->register(App\Providers\AppServiceProvider::class);
$app->register(App\Providers\EventServiceProvider::class);
\LumenDB::connection()->enableQueryLog();
app/Providers/AppServiceProvider.php
use Illuminate\Support\Facades\DB;
class AppServiceProvider extends ServiceProvider
{
public function boot()
{
DB::listen(function ($query) {
// $query->sql
// $query->bindings
// $query->time
Log::info("-------");
Log::info($query->sql);
});
}
The query is executed inside a Service method which is called by a Command scheduled by cron.
public function getAllStatsToday()
{
$today = new \DateTime();
$today->setTime(0, 0, 0);
$productUsageStats = ProductUsageStat::make()
->where('updated_at', '>', $today)
->get();
return $productUsageStats;
}

Answer 1

You have not registered the AppServiceProvider in your bootstrap/app.php. Because of this the boot method in your AppServiceProvider is never registered and thus the logging is never executed.
You should change app.php to the following:
$app->register(App\Providers\EventServiceProvider::class);
$app->register(App\Providers\AppServiceProvider::class);
\LumenDB::connection()->enableQueryLog();