core / Model.php codeigniter中显示错误

Question

I am newbie to Codeigniter and trying to edit fields that are entered in database. Also I am following this tutorial from CI tutorial . When I tried to run the site I got the error like

Message: Undefined property: Books::$query

Filename: core/Model.php

Line Number: 51

But I have not modified any code in core files. My model book_model.php is

function get($id)
    {
        //echo $id;
        $this->load->database();

       // echo 'sda';
        $query = $this->db->get_where('books',array('id'=>$id));

        echo 'test';
        $a = $this->query->row_array();
        var_dump($a);
        return $a;
    }

I can see the echo but var_dump() shows nothing.

Answer 1

Your referencing your query result string wrong.

Try:

$a = $query->row_array();

and your var_dump will work.

Generally in CI you should not echo stuff from your model. Use your controller to fetch data from the model and echo things in your views instead.