给定以下代码:
DB::table('users')->get();
我想得到上面的数据库查询生成器将生成的原始SQL查询字符串。在本例中,它将是SELECT*FROM用户。
我该怎么做?
给定以下代码:
DB::table('users')->get();
我想得到上面的数据库查询生成器将生成的原始SQL查询字符串。在本例中,它将是SELECT*FROM用户。
我该怎么做?
当前回答
为了记录所有执行的查询,可以使用DB::enableQueryLog()icw DB::getQueryLog(()。输出具有以下结构。
[
[
"query" => "select * from "users" where name = ?"
"bindings" => ["John Doe"]
"time" => 0.34
],
...
]
此外,我在这里结合了一些答案,以便获得完美的函数,用编译的绑定解析sql。见下文。我甚至创建了一个实现此功能的自定义生成器类,例如User::where('name','JohnDoe')->parse();
function parse_sql(string $sql, array $bindings) : string
{
$compiled_bindings = array_map('compile_binding', $bindings);
return preg_replace_array("/\?/", $compiled_bindings, $sql);
}
function compile_binding($binding)
{
$grammar = new MySqlGrammar;
if (is_bool($binding))
{
return (int)$binding; //This line depends on the database implementation
}
if(is_string($binding))
{
return "'$binding'";
}
if ($binding instanceof DateTimeInterface)
{
return $binding->format($grammar->getDateFormat());
}
return $binding;
}
其他回答
你可以使用发条
Clockwork是一个用于PHP开发的Chrome扩展,通过一个新面板扩展了Developer Tools,该面板提供了用于调试和分析PHP应用程序的各种信息,包括请求、标头、获取和发布数据、cookie、会话数据、数据库查询、路由、应用程序运行时可视化等信息。
但也适用于firefox
我创建了一些简单的函数来从一些查询中获取SQL和绑定。
/**
* getSql
*
* Usage:
* getSql( DB::table("users") )
*
* Get the current SQL and bindings
*
* @param mixed $query Relation / Eloquent Builder / Query Builder
* @return array Array with sql and bindings or else false
*/
function getSql($query)
{
if( $query instanceof Illuminate\Database\Eloquent\Relations\Relation )
{
$query = $query->getBaseQuery();
}
if( $query instanceof Illuminate\Database\Eloquent\Builder )
{
$query = $query->getQuery();
}
if( $query instanceof Illuminate\Database\Query\Builder )
{
return [ 'query' => $query->toSql(), 'bindings' => $query->getBindings() ];
}
return false;
}
/**
* logQuery
*
* Get the SQL from a query in a closure
*
* Usage:
* logQueries(function() {
* return User::first()->applications;
* });
*
* @param closure $callback function to call some queries in
* @return Illuminate\Support\Collection Collection of queries
*/
function logQueries(closure $callback)
{
// check if query logging is enabled
$logging = DB::logging();
// Get number of queries
$numberOfQueries = count(DB::getQueryLog());
// if logging not enabled, temporarily enable it
if( !$logging ) DB::enableQueryLog();
$query = $callback();
$lastQuery = getSql($query);
// Get querylog
$queries = new Illuminate\Support\Collection( DB::getQueryLog() );
// calculate the number of queries done in callback
$queryCount = $queries->count() - $numberOfQueries;
// Get last queries
$lastQueries = $queries->take(-$queryCount);
// disable query logging
if( !$logging ) DB::disableQueryLog();
// if callback returns a builder object, return the sql and bindings of it
if( $lastQuery )
{
$lastQueries->push($lastQuery);
}
return $lastQueries;
}
用法:
getSql( DB::table('users') );
// returns
// [
// "sql" => "select * from `users`",
// "bindings" => [],
// ]
getSql( $project->rooms() );
// returns
// [
// "sql" => "select * from `rooms` where `rooms`.`project_id` = ? and `rooms`.`project_id` is not null",
// "bindings" => [ 7 ],
// ]
用于获取带有绑定的SQL查询的“可宏”替换。
在AppServiceProvider boot()方法中添加以下宏函数。\Illuminate\Database\Query\Builder::宏('toRawSql',function(){return array_reduce($this->getBindings(),函数($sql,$binding){return preg_replace('/\?/',is_numeric($binding)$绑定:“”$结合“'”,$sql,1);},$this->to SQL());});为Elquent Builder添加别名。(Laravel 5.4+)\Illuminate\Database\Elquent\Builder::宏('toRawSql',函数(){return($this->getQuery()->toRawSql());});然后照常调试。(Laravel 5.4+)例如,查询生成器\日志::debug(\DB::table('users')->limit(1)->toRawSql())例如,Elquent Builder\日志::debug(\App\User::limit(1)->toRawSql());
注意:从Laravel 5.1到5.3,由于Elquent Builder不使用Macroable特性,因此不能在RawSql中添加Elquent生成器的别名。遵循以下示例以实现相同的效果。
例如,Elquent Builder(Laravel 5.1-5.3)
\Log::debug(\App\User::limit(1)->getQuery()->toRawSql());
要将上次运行的查询输出到屏幕,可以使用以下命令:
\DB::enableQueryLog(); // Enable query log
// Your Eloquent query executed by using get()
dd(\DB::getQueryLog()); // Show results of log
我相信最近的查询将位于阵列的底部。
你会得到这样的东西:
array(1) {
[0]=>
array(3) {
["query"]=>
string(21) "select * from "users""
["bindings"]=>
array(0) {
}
["time"]=>
string(4) "0.92"
}
}
(感谢约书亚在下面的评论。)
以下是我使用的解决方案:
DB::listen(function ($sql, $bindings, $time) {
$bound = preg_replace_callback("/\?/", function($matches) use ($bindings) {
static $localBindings;
if (!isset($localBindings)) {
$localBindings = $bindings;
}
$val = array_shift($localBindings);
switch (gettype($val)) {
case "boolean":
$val = ($val === TRUE) ? 1 : 0; // mysql doesn't support BOOL data types, ints are widely used
// $val = ($val === TRUE) ? "'t'" : "'f'"; // todo: use this line instead of the above for postgres and others
break;
case "NULL":
$val = "NULL";
break;
case "string":
case "object":
$val = "'". addslashes($val). "'"; // correct escaping would depend on the RDBMS
break;
}
return $val;
}, $sql);
array_map(function($x) {
(new \Illuminate\Support\Debug\Dumper)->dump($x);
}, [$sql, $bindings, $bound]);
});
请阅读代码中的注释。我知道,它并不完美,但对于我的日常调试来说,它还可以。它试图以或多或少的可靠性构建绑定查询。但是,不要完全信任它,数据库引擎以不同的方式对值进行转义,而这个短函数并没有实现这些值。所以,仔细观察结果。