错误消息：试图获取CODEIGNITER中非对象的属性

Question

I'm trying to get data from a certain table where the member id from a dropdown lis value is equal to the id from the other table. And i'm using jquery ajax also.

Here's my controller transactions.php

function getdataload(){

    $this->db->where('member',$this->input->post('member'));
    echo $this->db->get('loading_service')->row()->member;

}

And here's is my view.php

<label for="member">Member</label>
       <select class="form-control" id="member" name="member" required onchange="showCustomer(this.value)">
                <option selected="" value="">--select--</option>
                 <?php foreach ($members as $row): ?>
                 <option value="<?php echo $row->mem_id; ?>"><?php echo ucwords($row->mem_fname.' '.$row->mem_lname) ?></option>
                 <?php endforeach ?>
       </select>

<p class="help-block text-danger" style="margin-left: 600px; margin-top: -450px; color: red;"><span id="select_member"> </span></p>

<script>
$('#member').on('change',function(){
    $.post('<?php echo base_url("transactions/getdataload")?>',
        {
            mem_id:$(this).val()
        }).done(function(res)
        {
        $('#select_member').text(res);
    });
});

</script>

Please help me with this guys:

Answer 1

The first thing to do is make sure you are getting results from your query. Try something like

$query = $this->db->get(...);
if ($query->num_rows() > 0) {
    return json_encode($query->result());
} else {
    return "No data found";
}

then handle the no data error gracefully in your ajax success code. I sort of guessed that you would want your query result returned as json.

Answer 2

Try: model

function getData()
{
        $this->db->select('field_name');
        $this->db->from('loading_service');
        $this->db->where('member',$this->input->post('member'));
        $query=$this->db->get();
        return $query->row();
}

Controller

function getdataload(){

    $data['member'] = $this->model_name->getData();
    $this->load->view("view_name",$data);

}