如何将此原始查询 SQL 转换为 Laravel Eloquent:)

Question

如何将此原始查询 SQL 转换为 Laravel Eloquent:)

SELECT
    a_tables.`id` AS `a_id`,
    b_tables.`id` AS `b_id`,
    c_tables.`id` AS `c_id`
FROM
    laravel.a_tables AS P
        LEFT JOIN laravel.b_tables AS L ON L.`a_tables_id` = `a_id` AND L.user_id=2
        LEFT JOIN laravel.c_tables AS I ON I.`a_tables_id`  = `a_id` AND I.`b_tables_id` = `b_id` AND I.user_id=2
    WHERE
        P.user_id = 2;

Answer 1

尝试这个

DB::table("laravel.a_tables as p")
         ->leftJoin("laravel.b_tables as l", function($join){
              $join->on("l.a_tables_id", "=", "p.id")
              ->where("l.user_id", "=", 2);
          })
         ->leftJoin("laravel.c_tables as i", function($join){
              $join->on("i.a_tables_id", "=", "p.id")
              ->where("i.b_tables_id", "=", "l.id")
              ->where("i.user_id", "=", 2);
          })
         ->select("p.id as a_id", "l.id as b_id", "i.id as c_id")
         ->where("p.user_id", "=", 2)
         ->get();