Like-Unlike function in codeigniter - php

Question

I would like to implement this like and unlike into codeigniter. I can do it in the normal php using the following codes but I just don't why it is not working in codeigniter below is my database table and my model view and controller. any help would be appritiated. thanks.
posts table
CREATE TABLE `posts` (
`id` int(11) NOT NULL PRIMARY KEY AUTO_INCREMENT,
`title` varchar(100) NOT NULL,
`content` text NOT NULL,
`timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
like-unlike table
CREATE TABLE `like-unlike` (
`id` int(11) NOT NULL PRIMARY KEY AUTO_INCREMENT,
`user_id` int(11) NOT NULL,
`post_id` int(11) NOT NULL,
`purpose` int(2) NOT NULL,
`timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Jquery file
function likeItem(post_id)
{
if ($("#likeItem_" + post_id).text() == "Like")
{
$("#likeItem_" + postid).html('Unlike');
var purpose = "Like";
} else
{
$("#likeItem_" + post_id).html('Like');
var purpose = "UnLike";
}
$.ajax({
type: "POST",
url: "<?php echo base_url('posts/likes');?>",
data: "postId=" + postId + "&purpose=" + purpose,
success: function (data)
{
// do seomthing here with data
// console.log(data) --> to see data return or not
}
}
);
This is my model "Post_model.php"
public function itemLike() {
$id = $this->session->userdata('user_id');
$postId = $this->input->post('post_id');
$purpose = $this->input->post('purpose');
if ($purpose == "Like") {
// echo 'test';
// exit();
$data = array(
"user_id" => $id,
"post_id" => $postId,
);
$this->db->insert('like', $data);
} else {
echo 'failed';
}
}
This is my view file
<li><a class="like-unlike" href="#" id="likeItem_{$item['post_id']}" onclick="likeItem({$item['post_id']})">Like</a></li>
This is my Controller "Post.php"
public function likeItem()
{
$this->usermodel->itemLike();
}

Answer 1

In your database schema, you have mentioned table like_unlike and you are saving data in to table like-unlike.
Also, you set column purpose for mandatory and you are not passing any values here:
$data = array(
"user_id" => $id,
"post_id" => $postId,
);
You don't need to pass data if you use default value. You also need to keep in mind that column purpose holds only integer value as per your database schema.
Apart from this you also need to modify code mention by #JYoThI

Answer 2

1st : Post name mismatch data : "postId=" + post_id + "&purpose=" + purpose,
$postId = $this->input->post('post_id');
change to
$postId = $this->input->post('postId');
2nd : pass the data like below and variable name is post_id not postId
data : {postId:postid,purpose:purpose},
Note : variable names are case sensitive take care about that .