drupal-snippets/change_field.install at master · ajfwebdev/drupal-snippets · GitHub

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<?php

/**
 * An install hook that changes a field from text to long text type.
 * It changes the field data and field revision storage.
 */

/**
 * Alters field_my_text and reverts related features.
 */
function my_module_update_7160() {

  // Changes field_my_text from text to long text.
  db_query("UPDATE {field_config} SET type = 'text_long' WHERE field_name = 'field_my_text'");

  // For field data.
  db_drop_primary_key('field_data_field_my_text');
  db_change_field('field_data_field_my_text', 'field_my_text_value', 'field_my_text_value',
    [
      'type' => 'varchar',
      'length' => 255,
      'not null' => FALSE,
    ],
    [
      'primary key' => [
        'entity_type',
        'entity_id',
        'deleted',
        'delta',
        'language',
      ],
    ]
  );

  // For field revision.
  db_drop_primary_key('field_revision_field_my_text');
  db_change_field('field_revision_field_my_text', 'field_my_text_value', 'field_my_text_value',
    [
      'type' => 'varchar',
      'length' => 255,
      'not null' => FALSE,
    ],
    [
      'primary key' => [
        'entity_type',
        'entity_id',
        'deleted',
        'delta',
        'language',
      ],
    ]
  );

  field_cache_clear(TRUE);

  // Reverts features for field change and new text format.
  $modules = [
    'my_features_module',
    'my_other_features_module',
  ];

  foreach ($modules as $module) {
    features_revert_module($module);
  }
}