read more function with codeigniter - php

Question

i am trying to create a readmore function in codeigniter where the readmore link will be linked to a controller which would show all the data about that particular id....i am kind of confused on how to go about it... i tried...
<?php
$research_detail_url = site_url()."/research/research_details";
//echo json_encode($research)
if($research)
{
foreach ($research as $_research) {
$author = $_research->author;
$content = $_research->content;
$dsubmitted = $_research->dsubmitted;
echo "<div class='menu-collapse'> <h5>$author</h5>";
echo "<p>";
echo "<span class='support_text'>$content <span><br />";
echo "<span class='support_text'>$dsubmitted <span><br />";
echo "<a href='$research_detail_url' target='_blank' style='text-decoration:underline; color:#0088cc;'>
read more » </a>";
echo "</p> </div>";
}
}
?>
but i seem not be getting any results...i need help...
and this is my controller function.....
public function research_details($id='')
{
if(!$id)
{
echo "Project Id required";
return;
}
$_result = $this->projects_model->get_project($id);
if($_result)
{// success in fetching data hurray
$result['projects'] = $_result;
$users_ids = $this->users_model->get_user_ids(); //return available user id's
$groups_ids = $this->groups_model->get_group_ids(); //return available group id's
//echo json_encode($users_ids);
//echo json_encode($groups_ids);
$group_record = $this->map_names_to_ids($users_ids , $groups_ids );
$result['group_record'] = $group_record;
//load the view
$this->load->view('__includes__/header');
$this->load->view('__includes__/boostrap_responsive');
$this->load->view('projects/project_panel', $result);
$this->load->view('__includes__/footer_scripts');
$this->load->view('__includes__/wijmo_file_jquery');
$this->load->view('__includes__/footer');
}
else
{
exit("An Error occured in fetching the requested project");
}
}
and this is my model.....
<?php
class research_model extends CI_Model {
function add()
{
$this->db->insert('research',$_POST);
if($this->db->_error_number())
{
return $this->db->_error_number();
}
}
function update($article_id, $data_fields = NULL){
if($data_fields == NULL)
{
$this->db->where("article_id =".$article_id);
$this->db->update('research',$_POST);
}
else
{
$this->db->where("article_id =".$article_id);
$this->db->update('research',$data_fields);
}
$is_error = $this->db->_error_number();
if($is_error){
echo $is_error;
}
return TRUE;
}
function delete($id){
$this->db->where("article_id =".$id);
return $this->db->delete('research');
}
//return the research with this id
function get_research($id){
$this->db->where("article_id =".$id);
$query = $this->db->get('research');
if ($query->num_rows() > 0){
return $query->row_array();
}
else
echo $this->db->_error_message();
return FALSE;
}
//return the available research in the table
function get_research_all(){
$query = $this->db->get('research');
if ($query->num_rows() > 0)
{
foreach($query->result() as $row)
{
$result[] = $row;
}
return $result;
}
}
}
and my entire controller.....
<?php
class Research extends Public_Controller
{
function __construct()
{
parent::__construct();
$this->load->model('research_model');
}
function index()
{
if($this->ion_auth->is_admin())
{
$result = $this->research_model->get_research_all();
$data = array(
'main_content' => 'research/index',
'research' => $result
);
$this->load->view("loader", $data);
}
else
{
redirect('home');
}
}//END INDEX
// public view
function current()
{
$result = $this->research_model->get_research_all();
$data = array('research' => $result);
$this->load->view('__includes__/header');
$this->load->view('__includes__/navbar');
$this->load->view('research/current', $data);
$this->load->view('__includes__/footer');
}
function add()
{
if($this->ion_auth->is_admin())
{
$this->load->view("loader",array('main_content'=>"research/add_research"));
}
}//END ADD
function edit($id='')
{
if(! $id)
{
echo "research Id required";
return;
}
$result = $this->research_model->get_research($id);
if( ! $result)
{
echo "Nothing to edit";
return;
}
$result['main_content'] = "research/add_research";
$this->load->view("loader",$result);
}//END EDIT
function delete($id='')
{
if(! $id)
{
echo "Id required";
return;
}
$this->research_model->delete($id);
$this->get_research();
}//END DELETE
function submit($id='')
{
//validate form [perform validation server-side to make sure of fields]
$this->load->library('form_validation');
$this->form_validation->set_rules('author', 'Author', 'trim|required|min_length[4]');
if ($this->form_validation->run() == FALSE){
//ajax data array
$data = array(
'server_validation' => validation_errors()
);
echo str_replace('\\/', '/', json_encode($data));
}
else{
if($id){
$result = $this->research_model->update($id);
$content = "article has been UPDATED successfully";
//$retArr["content"] = $content;
//echo json_encode($retArr);
}
else{
$result = $this->research_model->add();
$content = "article has been CREATED successfully";
//$retArr["content"] = $content;
//echo json_encode($retArr);
}
//if duplicate key
if($result == 1062){
//ajax data array
$data = array();
$data['is_valid'] = 0;
echo json_encode($data);
}else{
//ajax data array
$data = array(
'is_valid' => 1,
'content' => $content
);
echo json_encode($data);
}
}//end ELSE form valid
}//END SUBMIT
public function research_details($id='')
{
if(!$id)
{
echo "Project Id required";
return;
}
$_result = $this->research_model->get_research($id);
if($_result)
{// success in fetching data hurray
$result['article'] = $_result;
//load the view
$this->load->view('__includes__/header');
$this->load->view('__includes__/boostrap_responsive');
$this->load->view('research/research_details', $Aresult);
$this->load->view('__includes__/footer_scripts');
$this->load->view('__includes__/wijmo_file_jquery');
$this->load->view('__includes__/footer');
}
else
{
exit("An Error occured in fetching the requested project");
}
}//END EDIT
}
?>
my public controller
<?php
abstract class Public_Controller extends CI_Controller
{
public $about_data;
function __construct()
{
parent::__construct();
//Making This variable availale for the whole site
$this->load->model('about_model');
$this->load->model('captcha_model');
//get your data
$this->about_data = $this->about_model->get_abouts();
}
}
?>

Answer 1

I see a couple of problems:
In your view, you are not closing the span tags. You need
</span>
In your view, you are creating the link, but you are not
including an ID, which you need in your controller. What I mean by this is the following:
First,you create this $research_detail_url = site_url()."/research/research_details";.
Then echo "<a href='$research_detail_url' target='_blank' style=''>read more</a>";
As you can see, your URL does not have an ID when created. What you should do is something like this: $research_detail_url = site_url()."/research/research_details/31"; where 31 is a random ID. You need to come up with the right ID needed in order to pass it to your controller. Your controller is currently assigning a blank ID since none is being passed which is why you end up with a result of "Project Id required"