CodeIgniter 搜索引擎无法正常工作 - 仅获取已发布的帖子

Question

我需要一些帮助。我的数据库中有一个名为 posts 的表，我想在其中创建搜索引擎功能。以下是它的基本字段：

 table: Posts
post_id (pk)
title
keywords
visible // ****  this is the critical point ****  

我也在我的 post_model 中创建了这个方法：

public function search() {
  $this->db->select('post_id, title, etc etc ...');

  // separate the words
  $words = preg_split('/[\s]+/', htmlentities((trim($this->input->post('search')))) ) ;

  // set fields that you wish to search
  $search_fields = array('title', 'keywords');

  // build the query
  foreach ($words as $word) {
   foreach ($search_fields as $field) {
    $this->db->or_like($field, $word);
   }
  }
  return parent::get();
 }

// Generates this query:
SELECT `post_id`, `title` etc etc ...
FROM (`posts`)
WHERE `posts`.`date_published` <= '2014-06-06'
AND `posts`.`visible` =  1
AND  `title`  LIKE '%Lorem,%'
OR  `keywords`  LIKE '%Lorem,%'
OR  `title`  LIKE '%Ipsum%'
OR  `keywords`  LIKE '%Ipsum%'
ORDER BY `date_published` DESC, `posts`.`category_id` ASC, `post_id` DESC

// This is the get() function inside MY_Model 
// Returns results like this $this->db->get($this->_table_name)->result();
public function get($id = NULL, $single = FALSE){
  if ($id != NULL) {
   $filter = $this->_primary_filter;
   $id = $filter($id);
   $this->db->where($this->_primary_key, $id);
   $method = 'row';
  }
  elseif($single == TRUE) {
   $method = 'row';
  }
  else {
   $method = 'result';
  }

  if (!count($this->db->ar_orderby)) {
   $this->db->order_by($this->_order_by);
  }
  return $this->db->get($this->_table_name)->$method();
 } 

问题是我也得到了和未发布的帖子（可见 = 0），这是意料之外的，相反，我想要得到的只是已发布的帖子（可见 = 1）。我该如何解决这个问题？

EDIT正确的查询是这样的：

SELECT `post_id`, `title` ... . *
FROM (`posts`)
WHERE `date_published` <= '2014-06-06'
AND `visible` =1
AND (
`title` LIKE '%Lorem,%'
OR `keywords` LIKE '%Lorem,%'
OR `title` LIKE '%Ipsum%'
OR `keywords` LIKE '%Ipsum%'
)
ORDER BY `date_published` DESC , `posts`.`category_id` ASC , `post_id` DESC

如何将其转换为活动记录？？

Answer 1

您可能需要在 AND/OR 逻辑中添加一些括号。

试试这个：

SELECT `post_id`, `title` etc etc ...
FROM (`posts`)
WHERE `posts`.`date_published` <= '2014-06-06'
AND `posts`.`visible` =  1
AND  
(`title`  LIKE '%Lorem,%'
OR  `keywords`  LIKE '%Lorem,%'
OR  `title`  LIKE '%Ipsum%'
OR  `keywords`  LIKE '%Ipsum%’)
ORDER BY `date_published` DESC, `posts`.`category_id` ASC, `post_id` DESC

要在 Codeigniter 中转换为活动记录，请查看 CodeIgniter Active Record multiple "where" and "or" statements 或 this