table

<?php
namespace App\Model\Table;

use App\Model\Entity\Calendar;
use Cake\ORM\Query;
use Cake\ORM\RulesChecker;
use Cake\ORM\Table;
use Cake\Validation\Validator;

/**
 * Calendars Model
 *
 * @property \Cake\ORM\Association\BelongsTo $ApiKeys
 * @property \Cake\ORM\Association\HasMany $CalendarEvents
 * @property \Cake\ORM\Association\HasMany $CalendarsFeeds
 */
class CalendarsTable extends Table
{

    /**
     * Initialize method
     *
     * @param array $config The configuration for the Table.
     * @return void
     */
    public function initialize(array $config)
    {
        parent::initialize($config);

        $this->table('calendars');
        $this->displayField('title');
        $this->primaryKey('id');

        $this->addBehavior('Timestamp');

        $this->belongsTo('ApiKeys', [
            'foreignKey' => 'api_key_id',
        ]);
        $this->hasMany('CalendarEvents', [
            'foreignKey' => 'calendar_id',
	        'dependent'  => true,
        ]);
        $this->belongsToMany('Feeds', [
            'className'         => 'Calendars',
            'joinTable'         => 'calendar_feeds',
            'foreignKey'        => 'id',
            'targetForeignKey'  => 'id',
            'dependent'         => false,
        ]);
    }

    /**
     * Default validation rules.
     *
     * @param \Cake\Validation\Validator $validator Validator instance.
     * @return \Cake\Validation\Validator
     */
    public function validationDefault(Validator $validator)
    {
        $validator
            ->integer('id')
            ->allowEmpty('id', 'create');

        $validator
            ->requirePresence('title', true, 'A title is required.')
            ->notEmpty('title', 'Title cannot be blank.');

        $validator
            ->integer('calendar_event_count')
            ->allowEmpty('calendar_event_count');

        return $validator;
    }

    /**
     * Returns a rules checker object that will be used for validating
     * application integrity.
     *
     * @param \Cake\ORM\RulesChecker $rules The rules object to be modified.
     * @return \Cake\ORM\RulesChecker
     */
    public function buildRules(RulesChecker $rules)
    {
        $rules->add($rules->existsIn(['api_key_id'], 'ApiKeys'));
        return $rules;
    }
}