Question

我正在使用ActiveRecord

生成如下查询

SELECT * FROM (`foods`) WHERE `type` = 'fruits' AND 
       `tags` LIKE '%green%' OR `tags` LIKE '%blue%' OR `tags` LIKE '%red%'

tags和值的数量未知。数组是动态创建的。下面我添加了一个可能的数组。

$tags = array (                 
        '0'     => 'green'.
        '1'     => 'blue',
        '2'     => 'red'
);

有一个标签数组，我使用以下循环来创建我在顶部发布的查询。

$this->db->where('type', $type); //var type is retrieved from input value

foreach($tags as $tag):         
     $this->db->or_like('tags', $tag);
endforeach;

问题：我需要在LIKE子句中添加括号，如下所示：

SELECT * FROM (`foods`) WHERE `type` = 'fruits' AND 
      (`tags` LIKE '%green%' OR `tags` LIKE '%blue%' OR `tags` LIKE '%red%')

如果括号内的内容是静态的，但foreach循环将我抛弃，我知道如何实现这一目标。

Answer 1

来自CI维基：

codeignighter ActiveRecord功能允许您创建SQL查询相对简单而且数据库独立，但有 isno具体支持包括 SQL查询中的括号。

例如，当你想要一个where语句出现在下面的时候：

WHERE (field1 = value || field2 = value) AND (field3 = value2 || field4 = value2)

这可以通过将字符串输入CI-＆gt; db-＆gt; where（）函数来解决，在这种情况下，您将需要专门转义值。

请参阅以下示例：

$value=$this->db->escape($value);
$value2=$this->db->escape($value2);
$this->db->from('sometable');
$this->db->where("($field = $value || $field2 = $value)");
$this->db->where("($field3 = $value2 || $field4 = $value2)");
$this->db->get();

一个类似的解决方法可以用于LIKE子句：

$this->db->where("($field LIKE '%$value%' || $field2 LIKE '%$value%')");
$this->db->where("($field3 LIKE '%$value2%' || $field4 LIKE '%$value2%')");

Answer 2

在CI 3.0-dev中，您可以在查询中添加组：

$this->db->select('id, title')
->group_start()
->or_like([ 'title' => $s, 'id' => $s ])
->group_end()                
->where([ 'b_del' => 0 ]);

产地：

SELECT `id`, `title`, `venda1`
FROM `itens`
WHERE   
(
`title` LIKE '%a%' ESCAPE '!'
OR  `id` LIKE '%a%' ESCAPE '!'
 )
AND `b_del` =0

Answer 3

关于The Silencer的解决方案，我写了一个小函数来帮助建立类似的条件

function make_like_conditions (array $fields, $query) {
    $likes = array();
    foreach ($fields as $field) {
        $likes[] = "$field LIKE '%$query%'";
    }
    return '('.implode(' || ', $likes).')';
}

你会这样使用它：

$search_fields = array(
    'field_1',
    'field_2',
    'field_3',
);
$query = "banana"
$like_conditions = make_like_conditions($search_fields, $query);
$this->db->from('sometable')
    ->where('field_0', 'foo')
    ->where($like_conditions)
    ->get()

Answer 4

只需添加我的成功解决方案：

$this->db->where("(table.field = $variable OR table.field IS NULL)");

Answer 5

使用codeigniter 3

$this->db->select('*');
    $this->db->from($this->MasterMember);
    $this->db->group_start();
    $this->db->where($this->IDCardStatus, '1');
    $this->db->or_where($this->IDCardStatus, '2');
    $this->db->group_end();

    if ($searchKey1 != null) {
        $this->db->group_start();
        $this->db->like($this->MemberID, $searchKey1);
        $this->db->or_like($this->FirstName, $searchKey2);
        $this->db->or_like($this->LastName, $searchKey3);
        $this->db->group_end();
    }

    $this->db->limit($limit, $offset);


    $data = $this->db->get();

这是我的本机查询

SELECT
    * 
FROM
    `Member` 
WHERE ( `Member`.`IDCardStatus` = '1' OR `Member`.`IDCardStatus` = '2' ) 
AND ( `Member`.`MemberID` LIKE '%some_key%' ESCAPE '!' OR `Member`.`FirstName` LIKE '%some_key%' ESCAPE '!' OR `Member`.`LastName` LIKE '%some_key%' ESCAPE '!' ) 
    LIMIT 10

Answer 6

更新代码点火器4：

$builder->select('*')->from('my_table')
        ->groupStart()
            ->where('a', 'a')
            ->orGroupStart()
                    ->where('b', 'b')
                    ->where('c', 'c')
            ->groupEnd()
    ->groupEnd()
    ->where('d', 'd')
->get();

// Generates:
// SELECT * FROM (`my_table`) WHERE ( `a` = 'a' OR ( `b` = 'b' AND `c` = 'c' ) ) AND `d` = 'd'

摘自https://codeigniter.com/user_guide/database/query_builder.html#query-grouping

上的官方文档

Answer 7

你不能在ActiveRecord中添加括号，但是你可能正在寻找WHERE IN？

$names = array('Frank', 'Todd', 'James');
$this->db->where_in('username', $names);
// Produces: WHERE username IN ('Frank', 'Todd', 'James')

Answer 8

$likes = array (                 
    '0'     => 'green'.
    '1'     => 'blue',
    '2'     => 'red'
);  
$where_like = "("; 
$or_counter = 1;
foreach($likes as $like_key => $like_val):
    $or_content = ($or_counter > 1) ?'OR': '';
    $newlikeval = $this->db->escape_like_str($like_val);
    $where_like .= $or_content." `$like_key` LIKE  '%$newlikeval%' ";
    $or_counter++;
endforeach;
$where_like .= ")";
$this->db->where($where_like);

动态Active Record查询中的Codeigniter括号

8 个答案: