CodeIgniter: Passing Arguments from View to Controller? - php

Question

EDIT: With the code below now, I am unsure on how to print out the bookmarks and the tags correctly
I’m completely new to CI and I have recently hit a road block. I’m very unsure how I would go about passing a function argument from the view file to the controller so I could use it on a function?
I have a foreach loop on the view going through the all the items passed by function get_latest_bookmarks. That function returns a ID for each item and I am wanting to use this with another function called get_bookmark_tags which will get the tags of the bookmark from another table. I have provided the code I have done so far below.
Model:
<?php
class Bookmark_model extends CI_Model {
function __construct()
{
parent::__construct();
}
function get_latest_bookmarks($limit)
{
// Load Database
$this->load->database();
// Query Database
$query = $this->db->get('Bookmark', $limit);
// Return Result
return $query;
}
function get_bookmark_tags($id)
{
// Load Database
$this->load->database();
$query = $this->db->query('SELECT Tag.Title
FROM `Tag`
INNER JOIN BookmarkTag
WHERE BookmarkTag.BookmarkID = "'.$id.'" AND Tag.TagID = BookmarkTag.TagID');
return $query;
}
Controller:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Welcome extends CI_Controller {
public function index()
{
// Load URL Helper
$this->load->helper('url');
// Load User Library
$this->load->library('ion_auth');
// Is User Logged In
if ($this->ion_auth->logged_in())
{
$data['user'] = $this->ion_auth->get_user_array();
}
else
{
redirect('auth/login');
}
// Load Bookmark Model
$this->load->model('Bookmark_model');
// Create Arrays
$bookmarks = array();
$tags = array();
// Query Database
$query = $this->Bookmark_model->get_latest_bookmarks(4);
//
foreach ($query->result() as $row) {
array_push($tags, $this->Bookmark_model->get_bookmark_tags($row->BookmarkID));
array_push($bookmarks, $row);
}
$data['tags_latest'] = $tags;
$data['bookmarks_latest'] = $bookmarks;
$this->load->view('welcome_message', $data);
}
}
View:
<h1>Latest Bookmarks</h1>
<?php foreach ($bookmarks_latest as $bookmark): ?>
<?php print_r($bookmark); ?>
<?php print_r($tags_latest->result()); ?>
<?php endforeach; ?>

Answer 1

You should do that in your Controller before you are passing the data to the View.
Try with something like this:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Welcome extends CI_Controller {
public function index()
{
// Load Model
$this->load->model('Bookmarks');
// Get Latest Bookmarks
$query = $this->Bookmarks->get_latest_bookmarks(4);
$bookmarks = array();
$tags = array();
foreach ($query->result() as $row) {
$bookmark_query = $this->Bookmarks->get_bookmark_tags($row->id);
$bookmark_arr = array();
foreach (bookmark_query->result() as $bookm) {
array_push($bookmark_arr, $bookm);
}
array_push($tags, $bookmark_arr);
array_push($bookmarks, $row);
}
$data['tags'] = $tags;
$data['bookmarks'] = $bookmarks;
// Load and Pass Data into View
$this->load->view('welcome_message', $data);
}
}

Answer 2

You don't.
The point in using a Framework is to default to proper standards. CodeIgniter follows a loose MVC pattern but you should never pass things from the view to the controller.
You can do it, but if you do it you'll be getting into a spaghetti mess pretty soon.
Grab the ID's on the controller. Even if it implicates running the same loop twice. You'll thank yourself latter on.