Laravel 5.3 - How to log all queries on a page?

问题:

My team and I are working on a rather big project. There's queries going on everywhere - in controllers, in view composers in views (lazy loading) and probably in some other services as well. It's getting hard to keep a track of it all and the page load speed is fairly slow at the moment.

Where would I put \DB::enableQueryLog() and \DB::getQueryLog() to log ALL the queries and dump them? Basically I'm looking for some place in code that happens before any of the queries happen (to put enableQueryLog()) and I'm looking for a place that happens after the views render (to dump getQueryLog()).

What would be a good way to go about this?

Thanks in advance.

回答1:

Here comes the perfect example:

https://laravel.com/docs/5.3/database#listening-for-query-events

Open app\Providers\AppServiceProvider.php and add the following to Boot() function:

DB::listen(function ($query) {
    var_dump([
        $query->sql,
        $query->bindings,
        $query->time
    ]);
});

回答2:

You can add this to the Providers/AppServiceProvider.php file and check them in the laravel log file with tail:

tail -f storage/logs/laravel.log

You can even filter with queries you want to log. For example, here I was using Laravel Passport, and didn't want to log all the oauth queries.

use Illuminate\Support\Facades\App;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Facades\Log;

public function register() {
    if (App::environment('local') && env('APP_URL') == 'http://localhost') {
        Event::listen('Illuminate\Database\Events\QueryExecuted', function ($query) {
            // filter oauth ones
            if (!str_contains($query->sql, 'oauth')) {
                Log::debug($query->sql . ' - ' . serialize($query->bindings));
            }
        });
    }
}

回答3:

Put this code right above the code where your query is executed

\DB::listen(function($sql) {
  die(\Illuminate\Support\Str::replaceArray('?', $sql->bindings, $sql->sql));
});

回答4:

add a middleware that executes after the request is done and logs your queries ... see Terminable Middlwares

回答5:

Are you using MySQL? You can just tail the log.

How to show the last queries executed on MySQL?

Or use the Laravel Debug Bar?

回答6:

If you want to print a query which is executed on your app do following steps.

Step1: Go to your AppServiceProvider.php file. // File path App\Providers\AppServiceProvider.php

Step2: Make boot() method and paste below code.

public function boot() {
        // Log queries
        if (true) {
            \DB::listen(function ($query) {
                \Log::info(
                    $query->sql, $query->bindings, $query->time
                );
            });
        }
    }

Step3: Now you can see you queries in lumen.log or laravel.log file. File path is laravel_app\storage\logs\laravel.log or lumen.log.

Enjoy....

回答7:

Additioanlly There's package available also:

log-my-queries

https://packagist.org/packages/technoknol/log-my-queries

Just install and add it's entry to middleware. It will log all the queries in laravel.log default log file.