entity_test.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the entity_test module.
 */
use Drupal\field\Entity\FieldStorageConfig;
use Drupal\field\Entity\FieldConfig;

/**
 * Implements hook_install().
 */
function entity_test_install() {
  foreach (entity_test_entity_types() as $entity_type) {

    // Auto-create fields for testing.
    FieldStorageConfig::create([
      'entity_type' => $entity_type,
      'field_name' => 'field_test_text',
      'type' => 'text',
      'cardinality' => 1,
    ])
      ->save();
    FieldConfig::create([
      'entity_type' => $entity_type,
      'field_name' => 'field_test_text',
      'bundle' => $entity_type,
      'label' => 'Test text-field',
      'translatable' => FALSE,
    ])
      ->save();
    \Drupal::service('entity_display.repository')
      ->getFormDisplay($entity_type, $entity_type)
      ->setComponent('field_test_text', [
      'type' => 'text_textfield',
    ])
      ->save();
  }
}

/**
 * Implements hook_schema().
 */
function entity_test_schema() {

  // Schema for simple entity.
  $schema['entity_test_example'] = [
    'description' => 'Stores entity_test items.',
    'fields' => [
      'id' => [
        'type' => 'serial',
        'not null' => TRUE,
        'description' => 'Primary Key: Unique entity-test item ID.',
      ],
    ],
    'primary key' => [
      'id',
    ],
  ];
  return $schema;
}
$module_handler = \Drupal::moduleHandler();
$index = \Drupal::state()
  ->get('entity_test.db_updates.entity_definition_updates');
$module_handler
  ->loadInclude('entity_test', 'inc', 'update/entity_definition_updates_' . $index);
$index = \Drupal::state()
  ->get('entity_test.db_updates.status_report');
$module_handler
  ->loadInclude('entity_test', 'inc', 'update/status_report_' . $index);