<?php
    
    use yii\db\Migration;
    
    class m161101_144434_blog_article_to_product extends Migration
    {
        public function up()
        {
            /**
             * Creates junction table and all stuff for adding related products to articles
             */
            $this->createTable(
                'blog_article_to_product',
                [
                    'blog_article_id' => $this->integer()
                                              ->notNull(),
                    'product_id'      => $this->integer()
                                              ->notNull(),
                ]
            );
            
            $this->createIndex(
                'blog_article_to_product_uk',
                'blog_article_to_product',
                [
                    'blog_article_id',
                    'product_id',
                ],
                true
            );
            
            $this->addForeignKey(
                'blog_article_to_product_art_fk',
                'blog_article_to_product',
                'blog_article_id',
                'blog_article',
                'id',
                'CASCADE',
                'CASCADE'
            );
            
            $this->addForeignKey(
                'blog_article_to_product_prod_fk',
                'blog_article_to_product',
                'product_id',
                'product',
                'id',
                'CASCADE',
                'CASCADE'
            );
        }
        
        public function down()
        {
            $this->dropForeignKey('blog_article_to_product_prod_fk', 'blog_article_to_product');
            $this->dropForeignKey('blog_article_to_product_art_fk', 'blog_article_to_product');
            $this->dropIndex('blog_article_to_product_uk', 'blog_article_to_product');
            $this->dropTable('blog_article_to_product');
        }
    }