Laravel并不会默认打印sql,所以需要我们自己来设置。
1、临时打印SQL
DB::enableQueryLog();
查询操作
Log::debug(DB::getQueryLog());
2、自动记录SQL日志
方法1:监听 QueryExecuted 事件
此事件是由 Illuminate\Database 提供,并且当你发起SQL的时候,此事件是被触发的,只是没有对应的监听器罢了。
在 app/Providers/EventServicePorvider.php 文件中 添加要注册的事件
use Illuminate\Database\Events\QueryExecuted;
use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;
class EventServiceProvider extends ServiceProvider
{
protected $listen = [
'Illuminate\Database\Events\QueryExecuted' => [
'App\Listeners\QueryListener',
],
];
}
执行 命令 php artisan event:generate
在 App\Listeners\QueryListener 文件的 handle 方法中编写记录 sql 的业务逻辑,如:
public function handle(QueryExecuted $event)
{
try{
if (env('APP_DEBUG') == true) {
$sql = str_replace("?", "'%s'", $event->sql);
foreach ($event->bindings as $i => $binding) {
if ($binding instanceof DateTime) {
$event->bindings[$i] = $binding->format('\'Y-m-d H:i:s\'');
} else {
if (is_string($binding)) {
$event->bindings[$i] = "'$binding'";
}
}
}
$log = vsprintf($sql, $event->bindings);
$log = $log.' [ RunTime:'.$event->time.'ms ] ';
(new Logger('sql'))->pushHandler(new RotatingFileHandler(storage_path('logs/sql/sql.log')))->info($log);
}
}catch (Exception $exception){
}
}
日志文件默认保存在 storage/logs/sql/ 目录下
方法2:
在 app/providers/AppServicesProviders.php 文件的 boot 方法编写如下代码
use Illuminate\Support\Facades\DB;
DB::listen(
function ($sql) {
foreach ($sql->bindings as $i => $binding) {
if ($binding instanceof \DateTime) {
$sql->bindings[$i] = $binding->format('Y-m-d H:i:s');
} else {
if (is_string($binding)) {
$sql->bindings[$i] = "'$binding'";
}
}
}
// Insert bindings into query
$query = str_replace(array('%', '?'), array('%%', '%s'), $sql->sql);
$query = vsprintf($query, $sql->bindings);
// Save the query to file
$logFile = fopen(
storage_path('logs' . DIRECTORY_SEPARATOR . date('Y-m-d') . '_query.log'),
'a+'
);
fwrite($logFile, date('Y-m-d H:i:s') . ': ' . $query . PHP_EOL);
fclose($logFile);
}
);
或者
DB::listen(function ($query) {
$tmp = str_replace('?', '"'.'%s'.'"', $query->sql);
$qBindings = [];
foreach ($query->bindings as $key => $value) {
if (is_numeric($key)) {
$qBindings[] = $value;
} else {
$tmp = str_replace(':'.$key, '"'.$value.'"', $tmp);
}
}
$tmp = vsprintf($tmp, $qBindings);
$tmp = str_replace("\\", "", $tmp);
\Log::info(' execution time: '.$query->time.'ms; '.$tmp."\n\n\t");
});
我们来看一下源码
此处 Facades\DB 代表我的 Illuminate\Database\MySqlConnection ,因为我也的是MySQL数据库,在它的基类 Connection 中有个 listen 方法:
public function listen(Closure $callback)
{
if (isset($this->events)) {
$this->events->listen(Events\QueryExecuted::class, $callback);
}
}
就是将闭包 $callback 监听 Events\QueryExecuted 事件,也就是方法1的 Illuminate\Database\Events\QueryExecuted 事件,然后传入到闭包中的参数 $sql 或 event。