Install script for CraftCMS plugin

Install.php

<?php

namespace upstatement\jobsboard\migrations;

use upstatement\jobsboard\Jobsboard;

use Craft;
use craft\config\DbConfig;
use craft\db\Migration;

class Install extends Migration
{
    // Public Properties
    // =========================================================================

    /**
     * @var string The database driver to use
     */
    public $driver;

    public function safeUp()
    {
        $this->driver = Craft::$app->getConfig()->getDb()->driver;
        if ($this->createTables()) {
            $this->addForeignKeys();
            // Refresh the db schema caches
            Craft::$app->db->schema->refresh();
        }

        return true;
    }

    public function safeDown()
    {
        $this->driver = Craft::$app->getConfig()->getDb()->driver;
        $this->removeTables();

        return true;
    }

    protected function createTables()
    {
        $tablesCreated = false;

        $tableSchema = Craft::$app->db->schema->getTableSchema('{{%jobsboard_jobs}}');
        if ($tableSchema === null) {
            $tablesCreated = true;
            $this->createJobsTable();
        }

        return $tablesCreated;
    }

    protected function createJobsTable()
    {
      $this->createTable(
          '{{%jobsboard_jobs}}',
          [
              'id' => $this->primaryKey(),
              'dateCreated' => $this->dateTime()->notNull(),
              'dateUpdated' => $this->dateTime()->notNull(),
              'invoiceNumber' => $this->integer(),
              'approved' => $this->boolean()->notNull()->defaultValue(true),
              'draft' => $this->boolean()->notNull()->defaultValue(true),
              'fieldLayoutId' => $this->integer(),
              'employerEmail' => $this->string()->notNull(),
              'expirationDate' => $this->date(),
              'postDate' => $this->date(),
          ]
      );
    }

    protected function addForeignKeys()
    {
        $this->addForeignKey(
            $this->db->getForeignKeyName('{{%jobsboard_jobs}}', 'id'),
            '{{%jobsboard_jobs}}',
            'id',
            '{{%elements}}',
            'id',
            'CASCADE',
            null
        );
    }

    protected function removeTables()
    {
        $this->dropTableIfExists('{{%jobsboard_jobs}}');
    }
}