php - 使用 codeigniter 的事件记录在 SQL 语句末尾放置 where 子句

Question

我正在尝试使用 codeingniter 的事件记录创建一个 SQL 语句，类似于:

SELECT *
FROM (`posts`)
JOIN `Post_images` ON `Post_images`.`post_id` = `posts`.`id`
WHERE `title`  LIKE '% $SEARCHTERM %'
OR  `content`  LIKE '% $SEARCHTERM %'
AND `location` =  ' $LOCATION '
GROUP BY `posts`.`id` 

我的 PHP 目前是:

$this->db->like('title', $term);

$this->db->or_like('content', $term);

$this->db->group_by('posts.id');

$this->db->join('Post_images', 'Post_images.post_id = posts.id');

$query = $this->db->get_where('posts', array('location' => $location));

return $query->result_array();

该 PHP 生成的查询是:

SELECT *
FROM (`posts`)
JOIN `Post_images` ON `Post_images`.`post_id` = `posts`.`id`
WHERE `location` =  ' $LOCATION '
AND  `title`  LIKE '% $SEARCHTERM %'
OR  `content`  LIKE '% $SEARCHTERM %'
GROUP BY `posts`.`id` 

由于 OR 语句位于末尾，如果在“内容”列中找到匹配项，则该位置将被完全忽略。

是否有办法确保将 WHERE 语句放置在 OR 语句之后？

Answer 1

试试这个:

$this->db->like('title', $term);
$this->db->or_like('content', $term);
$this->db->where('location = ', $location);
$this->db->group_by('posts.id');
$this->db->join('Post_images', 'Post_images.post_id = posts.id');
$query = $this->db->get('posts');

return $query->result_array();

这将重现您预期的查询，但我认为您希望这样的东西能够正常工作:

SELECT *
FROM (`posts`)
JOIN `Post_images` ON `Post_images`.`post_id` = `posts`.`id`
WHERE (`title`  LIKE '% $SEARCHTERM %'
OR  `content`  LIKE '% $SEARCHTERM %')
AND `location` =  ' $LOCATION '
GROUP BY `posts`.`id` 

注意我添加的括号

要使用事件记录执行此操作，您需要将字符串传递给where方法，如下所示:

$this->db->where("(`title` LIKE '% $term %' || `content` LIKE '% $term %')");
$this->db->where('location = ', $location);
$this->db->group_by('posts.id');
$this->db->join('Post_images', 'Post_images.post_id = posts.id');
$query = $this->db->get('posts');

return $query->result_array();

让我知道这是否有效