Problem save data from multiple select and association

Need Help
1

Please help. I have 3 tables, I need to save the data to the table ZboziZarazeni from the select field, but the patch entities will not get the data … can you please help me?

In table Zbozi can be saved. Table ZboziZarazeni has two primary key, maybe problem? Only one column refers to the table Zbozi, two column refers to the table Struktura

Thank you!

Zbozi TABLE:

public function initialize(array $config)
	{
		parent::initialize($config);

		$this->setTable('zbozi');
		$this->setDisplayField('id');
		$this->setPrimaryKey('id');

		$this->hasMany('ZboziZarazeni', [
			'foreignKey' => 'zbozi_id'
		]);

	}

ZboziZarazeni TABLE:

		public function initialize(array $config)
	{
		parent::initialize($config);

		$this->setTable('zbozi_zarazeni');
		$this->setDisplayField('zbozi_id');
		$this->setPrimaryKey(['zbozi_id', 'struktura_id']);

		$this->belongsTo('Zbozi', [
			'foreignKey' => 'zbozi_id',
			'joinType' => 'INNER'
		]);
		$this->belongsTo('Struktura', [
			'foreignKey' => 'struktura_id',
			'joinType' => 'INNER'
		]);

	}

Struktura TABLE:

		public function initialize(array $config)
	{
		parent::initialize($config);

		$this->setTable('struktura');
		$this->setDisplayField('id');
		$this->setPrimaryKey('id');

		$this->hasMany('ZboziZarazeni', [
			'foreignKey' => 'struktura_id'
		]);

	}

Zbozi CONTROLLER

if ($this->request->is(['patch', 'post', 'put'])) {
$Zbozi = $this->Zbozi->get($id, [
	'contain' => ['ZboziZarazeni']
]);
$Zbozi = $this->Zbozi->patchEntity($Zbozi, $this->request->getData(), [
	'associated' => ['ZboziZarazeni']
]);
if ($this->Zbozi->save($Zbozi)) {
	$this->Flash->success('OK');
	return $this->redirect(['action' => 'display']);
}
$this->Flash->error('ERROR');

}

Form

	echo $this->Form->control('zbozi_zarazeni.struktura_id._ids', [
	'label' => 'Zařazení',
	'required' => true,
	'type' => 'select',
	'multiple' => true,
	'options' => $ZarazeniTree,
	'value' => $ZarazeniTreeSelected,
	'escape' => false
]);