This is how I've defined the content_body in my FieldWidget:

$widget['content_body'] = array(
  '#title' => $this->t('Body text'),
  '#type' => 'textarea',
  '#default_value' => isset($items[$delta]) ? $items[$delta]->content_body : '',

which allows me to enter more than 255 characters when editing/creating the content. However, I get an error when more than 255 characters are entered and the content is created/updated.

This is the schema in my FieldType class:

$schema['columns']['content_body'] = array(
  'type' => 'text',
  'size' => 'tiny',
  'not null' => FALSE,

1 Answer 1


Use field type as Text (formatted, long) or Text (formatted, long, with summary)

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