如何在Codeigniter Active记录表单中使用WHERE 1编写mysql查询

Question

How to write the following query

SELECT * FROM `TABLE_NAME` WHERE 1 

in codeigniter Active record form ?

I tried something like:

$this->db->select('*');
$this->db->from('TABLE_NAME');
$this->db->where('1');

But I am getting the following error:

Error Number: 1054

Unknown column '1' in 'where clause'

SELECT * FROM (`TABLE_NAME`) WHERE `1` IS NULL

I am using same method for selecting values from database. I just pass the columns, condition and table name. My problem is, when I want to get all the data from a table, what will I give in the where clause ?

Following is my query section:

function get($fields,$table,$where)
{
     $this->db->select($fields);
     $this->db->from($table);
     $this->db->where($where); 
     $q = $this->db->get();
     if($q->num_rows() > 0)
     {
         foreach($q->result() as $row)
         {
              $data[] = $row;
         } 
         return $data; 
      }
 } 

Following how I call the function in controller:

$data['details'] = $this->MODEL_NAME->get("*",PREFIX."TABLE_NAME",1);

The model here is loaded from autoload.

Answer 1

Change

$this->db->where($where);

into

if ($where !== null) {
    $this->db->where($where);
}

and

function get($fields,$table,$where)

into

function get($fields,$table,$where=null)

so you can opt not to give $where when you call get .