Craft 3 Migration

m170911_134136_create_locations_entries.php

<?php

namespace craft\contentmigrations;

use Craft;
use craft\db\Migration;
use craft\models\Section;
use craft\fields\PlainText;
use craft\models\FieldLayoutTab;
use craft\models\Section_SiteSettings;

/**
 * m170911_134136_create_locations_entries migration.
 */
class m170911_134136_create_locations_entries extends Migration
{
    /**
     * @inheritdoc
     */
    public function safeUp()
    {
        // Add new field
        $addressField = new PlainText();
        $addressField->groupId = 1;
        $addressField->name = 'Address';
        $addressField->handle = 'address';
        $addressField->multiline = true;
        Craft::$app->fields->saveField($addressField);

        // Create new section
        $section = new Section();
        $section->name = 'Locations';
        $section->handle = 'locations';
        $section->enableVersioning = true;
        $section->type = Section::TYPE_STRUCTURE;
        $section->maxLevels = 1;

        // Set section uri and template
        $allSiteSettings = [];
        foreach (Craft::$app->getSites()->getAllSites() as $site) {
            $siteSettings = new Section_SiteSettings();
            $siteSettings->siteId = $site->id;
            $siteSettings->hasUrls = true;

            $siteSettings->uriFormat = 'locations';
            $siteSettings->template = 'locations.twig';

            $allSiteSettings[$site->id] = $siteSettings;
        }

        $section->setSiteSettings($allSiteSettings);
        Craft::$app->sections->saveSection($section);

        // Set-up default entry type of a new section
        $entryType = $section->getEntryTypes()[0];
        $fieldLayout = $entryType->getFieldLayout();

        // Create field layout tab to assign fields to
        $fieldLayoutTab = new FieldLayoutTab();
        $fieldLayoutTab->name = 'Content';
        $addressField->required = true;
        $fieldLayoutTab->setFields([$addressField]);

        $fieldLayout->setTabs([$fieldLayoutTab]);
        $entryType->setFieldLayout($fieldLayout);
        Craft::$app->sections->saveEntryType($entryType);
    }

    /**
     * @inheritdoc
     */
    public function safeDown()
    {
        Craft::$app->sections->deleteSection(Craft::$app->sections->getSectionByHandle('locations'));
        Craft::$app->fields->deleteField(Craft::$app->fields->getFieldByHandle('address'));
    }
}