edit post is not working in cakephp - cakephp

Question

I am learning Cakephp framwork. I am having problem while I am trying to update database record.
This is Controller code for edit post....
$this->loadModel('Post');
if($this->request->is('put')):
$this->Post->id = $this->params['id'];
if($this->Post->save($this->request->data)):
$this->Session->setFlash(__('Page has been edited'));
$this->redirect('/User/index');
endif;
else:
$this->set('postinfo', $this->Post->findById($this->params['id']));
endif;
}
This is view/edit.ctp file
echo $this->Form->update('Post', array(
'method' => 'put'
));
echo $this->Form->input('title',array('type' => 'text','value'=>$postinfo['Post']['title']));
echo $this->Form->input('body', array('type' => 'textarea','value' => $postinfo['Post']['body']));
echo $this->Form->submit('Submit', array('class'=>'btn btn-primary'));
echo $this->Form->end();
But this code does not update record in database...I tried everything from book.cakephp.org tutorial and other tutorials related to cakephp..
I hope I'll get some help from you guys :)

Answer 1

If this is PostController, than you don't need to call the $this->loadModel('Post'); function.
In view you need a hidden field with id of post.

Answer 2

Controller code for edit post
public function edit($id = null) {
if (!$id) {
throw new NotFoundException(__('Invalid post'));
}
$post = $this->Post->findById($id);
if (!$post) {
throw new NotFoundException(__('Invalid post'));
}
if ($this->request->is('post') || $this->request->is('put')) {
$this->Post->id = $id;
if ($this->Post->save($this->request->data)) {
$this->Session->setFlash('Your post has been updated.');
$this->redirect(array('action' => 'index'));
}
else {
$this->Session->setFlash('Unable to update your post.');
}
}
if (!$this->request->data) {
$this->request->data = $post;
}
}
view/edit.ctp file
<h1>Edit Post</h1>
<?php
echo $this->Form->create('Post');
echo $this->Form->input('title');
echo $this->Form->input('body', array('rows' => '3'));
echo $this->Form->input('id', array('type' => 'hidden'));
echo $this->Form->end('Save Post');
?>