Cakephp 3 save associations dose not work - php

Question

I try to make a blog with articles and tags but for some reason my tags wont save when creating articles.
I did followed some ideas from official cake blog and from here but no luck for me .. Maybe something I do wrong and I dont see.
Tables for keywords
CREATE TABLE `keywords` (
`id` int(11) NOT NULL,
`article_id` int(11) DEFAULT NULL,
`tag` varchar(255) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Table model
Keywords:
class KeywordsTable extends Table
{
......................
public function initialize(array $config)
{
parent::initialize($config);
$this->table('keywords');
$this->displayField('id');
$this->primaryKey('id');
$this->belongsTo('Article', [
'foreignKey' => 'article_id',
'joinType' => 'INNER'
]);
}
....................
}
Article
class ArticleTable extends Table
{
public function initialize(array $config)
{
parent::initialize($config);
$this->table('article');
$this->displayField('id');
$this->primaryKey('id');
$this->addBehavior('Timestamp');
$this->belongsTo('Users', [
'foreignKey' => 'user_id',
'joinType' => 'INNER'
]);
$this->hasMany('Keywords', [
'foreignKey' => 'article_id'
]);
}
......................................
}
And here is my controller:
public function add()
{
//$this->autoRender = false;
$article = $this->Article->newEntity();
if ($this->request->is('post')) {
$article = $this->Article->patchEntity($article, $this->request->data, ['associated'=>['Keywords']]);
echo "<pre>";
print_r($this->Article->save($article));
die();
}
}
And this is the code I use in my form
<?= $this->Form->input('article[keywords][]', ['label'=>false, 'class' => 'form-control', 'placeholder' => 'keywords', 'templates' => ['inputContainer' => '{{content}}']]); ?>
So if any one could help me out I will appreciate.

Answer 1

Ok, after 4 hours I managed to find the problem.
Problem was in my view form input.
It should have been article.0.tag instead of article[keywords][]
Changed that and all works now.
Regards

Answer 2

in controller you should use associated array, more details-
$this->Article->save($article,['associated' => ['Keywords']]);
and in view file, make input field like this -
<?= $this->Form->input('keywords.0.title', ['label'=>false, 'class' => 'form-control', 'placeholder' => 'keywords', 'templates' => ['inputContainer' => '{{content}}']]); ?>
more details