[英]Codeigniter parentheses in Active Record query
I have this ActiveRecord to produce a query, 我有这个ActiveRecord来生成一个查询,
$this->purchase_requisition_model
->where('deleted','1')
->likes('to',$sapfvalue,'both')
->likes('date',$sapfvalue,'both')
->likes('request_by',$sapfvalue,'both')
->likes('deliver_to',$sapfvalue,'both')
->likes('name',$sapfvalue,'both')
->likes('telephone',$sapfvalue,'both')
->likes('designation',$sapfvalue,'both')
->likes('budget_status',$sapfvalue,'both')
->find_all();
the above ActiveRecord will produce the following query, 上面的ActiveRecord将产生以下查询,
SELECT * FROM (`purchase_requisition`)
WHERE `deleted` = '1'
AND `to` LIKE '%fg%'
OR `date` LIKE '%fg%'
OR `request_by` LIKE '%fg%'
OR `deliver_to` LIKE '%fg%'
OR `name` LIKE '%fg%'
OR `telephone` LIKE '%fg%'
OR `designation` LIKE '%fg%'
OR `budget_status` LIKE '%fg%'
but how do I do using ActiveRecord to produce the below query? 但是如何使用ActiveRecord生成以下查询?
SELECT * FROM (`purchase_requisition`)
WHERE `deleted` = '1'
AND ( `to` LIKE '%fg%'
OR `date` LIKE '%fg%'
OR `request_by` LIKE '%fg%'
OR `deliver_to` LIKE '%fg%'
OR `name` LIKE '%fg%'
OR `telephone` LIKE '%fg%'
OR `designation` LIKE '%fg%'
OR `budget_status` LIKE '%fg%' )
As @M Khalid Junaid has pointed out, Codeigniter's active record library doesn't support grouped where clauses. 正如@M Khalid Junaid指出的那样,Codeigniter的活动记录库不支持分组where子句。 You can create a workaround by using "where" while preventing Codeigniter from automatically escaping the query: 您可以使用“where”创建变通方法,同时阻止Codeigniter自动转义查询:
$escaped_sapfvalue = $this->db->escape( $sapfvalue );
$this->purchase_requisition_model
->where('deleted','1')
->where("( `to` LIKE '%{$escaped_sapfvalue}%'", null, FALSE)
->where("OR `date` LIKE '%{$escaped_sapfvalue}%'", null, FALSE)
->where("OR `request_by` LIKE '%{$escaped_sapfvalue}%'", null, FALSE)
->where("OR `deliver_to` LIKE '%{$escaped_sapfvalue}%'", null, FALSE)
->where("OR `name` LIKE '%{$escaped_sapfvalue}%'", null, FALSE)
->where("OR `telephone` LIKE '%{$escaped_sapfvalue}%'", null, FALSE)
->where("OR `designation` LIKE '%{$escaped_sapfvalue}%'", null, FALSE)
->where("OR `budget_status` LIKE '%{$escaped_sapfvalue}%' )", null, FALSE)
->find_all();
Notice than how I manually escaped the variable to prevent SQL injection. 请注意我是如何手动转义变量以防止SQL注入的。 Also notice how the first and last "LIKE" include the opening and closing parenthesis, respectively. 还要注意第一个和最后一个“LIKE”如何分别包括左括号和右括号。
While this works, it has a lot of repeated code. 虽然这有效,但它有很多重复的代码。 Looping through an array would be more elegant: 循环遍历数组会更优雅:
$escaped_sapfvalue = $this->db->escape( $sapfvalue );
$or_like = '';
foreach( $column_list as $column ) {
// If it's not the first column, add 'OR'
if ( strlen($or_like) > 0 ) {
$or_like .= ' OR ';
}
// Concatenate manually escaped columns and rows
$escaped_column = $this->db->escape( $column );
$or_like .= "`{$escaped_column}` LIKE '%{$escaped_sapfvalue}%'";
}
// Add grouping parenthesis
$grouped_or_like = "( {$or_like} )";
// Build the query
$this->purchase_requisition_model
->where('deleted','1')
->where( $grouped_or_like, null, false )
->find_all();
EDIT: And while I haven't tested it, I've just thought this should work too: 编辑:虽然我没有测试过,但我认为这也应该有效:
$escaped_sapfvalue = $this->db->escape( $sapfvalue );
$this->purchase_requisition_model
->where('deleted','1')
->where("( `to` LIKE '%{$escaped_sapfvalue}%'", null, FALSE)
->or_like('date',$sapfvalue,'both')
->or_like('request_by',$sapfvalue,'both')
->or_like('deliver_to',$sapfvalue,'both')
->or_like('name',$sapfvalue,'both')
->or_like('telephone',$sapfvalue,'both')
->or_like('designation',$sapfvalue,'both')
->where("OR `budget_status` LIKE '%{$escaped_sapfvalue}%' )", null, FALSE)
->find_all();
Choose whatever works best for you. 选择最适合你的方法。
You can use query grouping too. 您也可以使用查询分组 。
Code will look like this: 代码如下所示:
$this->db->where('deleted', 1);
$this->db->group_start();
$this->db->or_like('to', $sapfvalue, 'both')
$this->db->or_like('date', $sapfvalue, 'both')
$this->db->or_like('request_by', $sapfvalue, 'both')
$this->db->or_like('deliver_to', $sapfvalue, 'both')
$this->db->or_like('name', $sapfvalue, 'both')
$this->db->or_like('telephone', $sapfvalue, 'both')
$this->db->or_like('designation', $sapfvalue, 'both')
$this->db->or_like('budget_status', $sapfvalue, 'both')
$this->db->group_end();
$q = $this->db->get('table')->result();
Using group_start and group_end assures that this part of or_like statements between then will get into brackets. 使用group_start和group_end确保之间的or_like语句的这一部分将进入括号。
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