ewp_institutions.install

<?php

/**
 * @file
 * Contains install, update and uninstall hooks.
 */

use Drupal\Core\Field\BaseFieldDefinition;

/**
 * Increase the max length of the entity label to 255 characters.
 */
function ewp_institutions_update_8101() {
  $field_spec = [
    'type' => 'varchar',
    'length' => '255',
    'not null' => TRUE,
  ];
  \Drupal::database()->schema()->changeField('hei', 'label', 'label', $field_spec);

  $definition = BaseFieldDefinition::create('string')
    ->setLabel(t('Label'))
    ->setDescription(t('The internal label of the Institution entity.'))
    ->setSettings([
      'max_length' => 255,
      'text_processing' => 0,
    ])
    ->setDefaultValue('')
    ->setDisplayOptions('view', [
      'label' => 'hidden',
      'type' => 'string',
      'weight' => -20,
    ])
    ->setDisplayOptions('form', [
      'type' => 'string_textfield',
      'weight' => -20,
    ])
    ->setDisplayConfigurable('form', TRUE)
    ->setDisplayConfigurable('view', TRUE)
    ->setRequired(TRUE);

  \Drupal::entityDefinitionUpdateManager()
    ->installFieldStorageDefinition('label', 'hei', 'hei', $definition);
}