Call to a member function num_rows() on a non-object in model file

Question

This is my code in model..

function get_info($product_id)
{
    $this->db->from('product');
    $this->db->where('product_id',$product_id);

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

    if($query->num_rows()==1)
    {
        return $query->row();
    }

So many questions on stackoverflow but I Dont found any answer related to scenario. So what I am doing wrong??

Answer 1

Your query is probably failing. Make sure database debugging in on and modify your code:

if ($query !== FALSE)
{
    // Run your code
    if ($query->num_rows() === 1)
    {
        return $query->row();
    }
}
else
{
    // Check error
    echo 'Database Error(' . $this->db->_error_number() . ') - ' . $this->db->_error_message();
}

Answer 2

Seems like you have found nothing as a result, so query returns false. The other option is a problems with db connection, check it in config files.

Answer 3

Are you able to execute any SQL queries? I suspect that your database connection doesn't work at all ... check your DB settings