Route::get('test', function () { {代码...} // 获取已执行的查询数组 {代码...} }); array:2 [▼ 0 => array:3 [▼ {代码...} ] 1 => array:3 [▼ {代码...} ]] 上述代码中为什么不是select id from user ...

求laravel一对一一对多原生查询语句

Route::get('test', function () {

DB::connection()->enableQueryLog();

// 获取已执行的查询数组

Users::with('posts')->get();
dd(DB::getQueryLog());

});

array:2 [▼
0 => array:3 [▼

"query" => "select * from `users`"
"bindings" => []
"time" => 2.76

]
1 => array:3 [▼

"query" => "select * from `posts` where `posts`.`users_id` in (?, ?)"
"bindings" => array:2 [▶]
"time" => 0.71

]
]

上述代码中为什么不是select id from user 然后把这个查询结果用于下一步的in中，