URI routing in CodeIgniter causes 404 error - php

Question

Second EDIT - Found the Problem, and answered it as well.
First Edit - added my Post_model.php file as well for clearer explanation of my code.
I am trying to redirect a Blogs slug to a separate page where I can show the entire blogs content.
here's an example slug
http://localhost/aag/posts/test-one
Here's the Posts controller
<?php
class Posts extends CI_Controller {
public function index(){
// Shows a blog listing
}
public function view($slug = NULL){
$data['post'] = $this->post_model->get_posts($slug);
if(empty($data['post'])){
show_404();
}
$data['title'] = $data['post']['title'];
$this->load->view('templates/header');
$this->load->view('posts/view', $data);
$this->load->view('templates/footer');
}
}
The posts/view.php file
<h2><?php echo $post['title']; ?></h2>
<small class="post-date">Created on <?php echo $post['created_at']?></small><br>
<div class="post-body">
<?php echo $post['body']; ?>
</div>
the Post_model.php
class Post_model extends CI_Model
{
public function __construct()
{
$this->load->database();
}
public function get_posts($slug = FALSE)
{
if ($slug === FALSE) {
$query = $this->db->get('posts');
return $query->result_array();
}
$query = $this->db->get_where('posts', array('slug' => '$slug'));
return $query->row_array();
}
}
routes.php
$route['posts/(:any)'] = 'posts/view/$1';
$route['posts'] = 'posts/index';
$route['(:any)'] = 'pages/view/$1';

Answer 1

Okay, so years of writing mysqli queries made me do this mistake. In my Post_model.php I am getting the data where (DB column field) slug should match the $slug that gets passed in, but I surrounded the slugs inside single quotes that was causing the error. Here's the working code now.
class Post_model extends CI_Model
{
public function __construct()
{
$this->load->database();
}
public function get_posts($slug = NULL)
{
if ($slug === NULL) {
$query = $this->db->get('posts');
return $query->result_array();
}
$query = $this->db->get_where('posts', array('slug' => $slug));
return $query->row_array();
}
}
TLDR: Don't encapsulate your passed in arguments inside quotes.