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Field CRUD API

Create, update, and delete Field API fields, bundles, and instances.

Code

modules/field/field.crud.inc, line 448

<?php
function field_update_instance($instance) {
  // Check that the specified field exists.
  $field = field_read_field($instance['field_name']);
  if (empty($field)) {
    throw new FieldException("Attempt to update an instance of a nonexistent field.");
  }

  // Check that the field instance exists (even if it is inactive, since we
  // want to be able to replace inactive widgets with new ones).
  $prior_instance = field_read_instance($instance['field_name'], $instance['bundle'], array('include_inactive' => TRUE));
  if (empty($prior_instance)) {
    throw new FieldException("Attempt to update a field instance that doesn't exist.");
  }

  $instance['id'] = $prior_instance['id'];
  $instance['field_id'] = $prior_instance['field_id'];

  _field_write_instance($instance, TRUE);

  // Clear caches.
  field_cache_clear();
}
?>