Laravel: 未获取所需数据

Question

我是 Laravel 新手，所以我不明白为什么这个查询只给我一个用户结果，而不是所有包含 posts.title 或 posts.description 的条目。这应该是一个搜索表达式 (%for%) 并使用特定类别 (get)。

DB::table('posts')
->join('users', 'users.id', '=', 'posts.user_id')
->join('locations', 'users.id', '=', 'locations.id')
->join('main_categories', 'main_categories.id', '=', 'posts.main_category_id')
->select('posts.*', 'users.*', 'locations.address', 'main_categories.name as cat', DB::raw('ROUND((6371 * ACOS(COS(RADIANS(31.430443800000003)) * COS(RADIANS(locations.lattitude)) * COS(RADIANS(locations.longitude) - RADIANS(74.280726)) + SIN(RADIANS(31.430443800000003)) * SIN(RADIANS(locations.lattitude)))),2) AS DISTANCE'))
->where([['posts.title','like','%for%'],['main_categories.name', '=', 'get']])
->orwhere([['posts.description','like','%for%'],['main_categories.name', '=', 'get']])
->get();

我正在尝试将此 MySQL 查询转换为 Laravel 格式。这个 MySQL 查询给了我 3 行，一个用户的 2 行和另一个用户的 1 行。但是在 Laravel 我只得到一个用户行。

SELECT
  posts.title,
  posts.description,
  posts.sub_category_id,
  posts.image,
  posts.created_at,
  posts.main_category_id,
  posts.user_id,
  locations.address,
  ROUND(
    (
      6371 * ACOS(
        COS(RADIANS(31.430443800000003)) * COS(RADIANS(locations.lattitude)) * COS(
          RADIANS(locations.longitude) - RADIANS(74.280726)
        ) + SIN(RADIANS(31.430443800000003)) * SIN(RADIANS(locations.lattitude))
      )
    ),
    2
  ) AS DISTANCE
FROM
  posts
INNER JOIN
  users ON posts.user_id = users.id
INNER JOIN
  locations ON users.location_id = locations.id
INNER JOIN
  main_categories ON main_categories.id = posts.main_category_id
WHERE
  (
    (
      posts.title LIKE '%for%' OR posts.description LIKE '%for%'
    ) AND(main_categories.name = 'Get')
  )

Answer 1

您在 Laravel 查询中使用了无效的连接。而不是

->join('locations', 'users.id', '=', 'locations.id')

应该是

 ->join('locations', 'users.location_id', '=', 'locations.id')

因为在您的原始查询中您使用：

INNER JOIN
  locations ON users.location_id = locations.id

Laravel: 未获取所需数据

Laravel: Not getting required data

php

mysql

laravel

laravel-query-builder

laravel-5.4