CodeIgniter：如何编写 where_in OR where_in 查询？

Question

I'm using codeigniter to query a database, and I need to conditionally compare arrays in the where clause.

So basically I want to do: where_in OR where_in depending on what array has data in it. So I will have either an array of user_id OR an array of area_id's.

I'm not sure how to combine the where_in comparison. This is the query i need to amends:

public function get_checks_test($org_id,$users,$areas) {
    // get todays date
    $todays_date = date("Y-m-d");
    // build where array
    $check_array = array('c.org_id =' => $org_id, 'c.status !=' => '0', 'c.due <=' => $todays_date);
    // build query
    $this->db->select('c.*,a.check_area_id,b.check_user_id,d.area_name,u.first_name,u.last_name');
    $this->db->order_by('c.due', 'asc');
    $this->db->where($check_array);
    $this->db->where_in('user_id', $users);
    $this->db->or_where_in('area_id', $areas);
    $this->db->join('check_assigned_areas a','a.check_id = c.check_id','left');
    $this->db->join('check_assigned_users b','b.check_id = c.check_id','left');
    $this->db->join('areas d','d.area_id = a.check_area_id','left');
    $this->db->join('users u','u.id = b.check_user_id','left');
    $check_object = $this->db->get('checks c');
    return $check_object->result();
}

I don't think there is a or_where_in function that I can find.

Can I do it like this or do I need a rethink?

Thanks

Answer 1

Yes, there is a or_where_in function in Codeigniter.

Example

$arr_price=array(20,40,80,30);
$this->db->or_where_in('price', $arr_price);
//SQL Query: OR price IN(20,40,80,30);

Syntax:

or_where_in([$key = NULL[, $values = NULL[, $escape = NULL]]])

Parameters:

$key (string) – The field to search
$values (array) – The values searched on
$escape (bool) – Whether to escape values and identifiers

Returns:

DB_query_builder instance

Return type:

object

Generates a WHERE field IN('item', 'item') SQL query, joined with 'OR' if appropriate. Generates a WHERE field IN('item', 'item') SQL query, joined with 'OR' if appropriate.

If more help needed, I'm happy to help. Happy Coding.

Answer 2

I'm not sure if this is what you want:

if(!empty($users)){
    $this->db->where_in('user_id', $users);
}
elseif(!empty($areas)){
    $this->db->where_in('area_id', $areas);
}

Answer 3

当您使用“左”连接时，无论如何都不要使用“where条件”作为or_where_in和where_in因为如果未找到，它将为该左查询创建 array() 。

$this->db->join('users u', 'u.id = b.check_user_id and u.id=' . $users, 'left');