How can I make num_rows work for this select query?

Question

OK, so I have this strange problem. My num_rows doesn't work, I tried everything.

So the idea, is that if there are no selected rows from the database, it should show a <div> . But it doesn't.

I have no error messages, so I don't know what I can do.

<?php
    $query = $this->db->query("SELECT null FROM donations WHERE donateName = ? ORDER BY donateID DESC LIMIT 1", array(getUserData($this->session->userdata('logged_in')["id"], "name")));
    foreach($query->result() as $row) {
        if(!$query->num_rows()) { ?> 
<div class="col-lg-4">
                <div class="card">
                                            <div class="card-header">
                                                    <h5 class="card-header-text">I</h5>
                                            </div>

                                            <div class="card-block">
                        <ul style="margin-left: 25px; list-style: initial;">

                        <br><li>test</li>
                        </ul>
                                            </div>
                                    </div>
            </div>
        <?php } } ?>

Answer 1

Sorry, I've decided to edit my answer, since I was wrong.

You just need to remove your foreach -loop.

Answer 2

You should just remove the

foreach($query->result() as $row) {

(and closing } ).

as this would normally be to loop over the result set. You just want to say there are no rows so just have the if .

You could also remove the ORDER BY donateID from the SQL as it doesn't really matter what order they come back in.

Answer 3

If you are using codeigniter then you may like this query format.

// Model
function get_count($table, $where = array(), $fields = false) {  
    // echo"<pre>";print_r($where);exit;      
    if (!$fields) {
        $fields = '*';
    }
    $this->db->select($fields);
    $this->db->from($table);
    $this->db->where($where);

    $query = $this->db->get();
    // echo $this->db->last_query();exit;
    return $query->num_rows();
}

Call the function by providing the required arguments like

// Controller
$table = 'mytalbe';
$where = array(
  'id' => '34' // for example
);
$count = get_count($table, $where);

Hope this will help you in future to reuse the code.