CHANGELOG
=========

2.1.0
-----

 * [BC BREAK] ``read_only`` field attribute now renders as ``readonly="readonly"``, use ``disabled`` instead
 * [BC BREAK] child forms now aren't validated anymore by default
 * made validation of form children configurable (new option: cascade_validation)
 * added support for validation groups as callbacks
 * made the translation catalogue configurable via the "translation_domain" option
 * added Form::getErrorsAsString() to help debugging forms
 * allowed setting different options for RepeatedType fields (like the label)
 * added support for empty form name at root level, this enables rendering forms
   without form name prefix in field names
 * [BC BREAK] form and field names must start with a letter, digit or underscore
   and only contain letters, digits, underscores, hyphens and colons
 * [BC BREAK] changed default name of the prototype in the "collection" type
   from "$$name$$" to "\__name\__". No dollars are appended/prepended to custom
   names anymore.
 * [BC BREAK] improved ChoiceListInterface
 * [BC BREAK] added SimpleChoiceList and LazyChoiceList as replacement of
   ArrayChoiceList
 * added ChoiceList and ObjectChoiceList to use objects as choices
 * [BC BREAK] removed EntitiesToArrayTransformer and EntityToIdTransformer.
   The former has been replaced by CollectionToArrayTransformer in combination
   with EntityChoiceList, the latter is not required in the core anymore.
 * [BC BREAK] renamed
   * ArrayToBooleanChoicesTransformer to ChoicesToBooleanArrayTransformer
   * ScalarToBooleanChoicesTransformer to ChoiceToBooleanArrayTransformer
   * ArrayToChoicesTransformer to ChoicesToValuesTransformer
   * ScalarToChoiceTransformer to ChoiceToValueTransformer
   to be consistent with the naming in ChoiceListInterface.
 * [BC BREAK] removed FormUtil::toArrayKey() and FormUtil::toArrayKeys().
   They were merged into ChoiceList and have no public equivalent anymore.
 * choice fields now throw a FormException if neither the "choices" nor the
   "choice_list" option is set
 * the radio type is now a child of the checkbox type
 * the collection, choice (with multiple selection) and entity (with multiple
   selection) types now make use of addXxx() and removeXxx() methods in your
   model if you set "by_reference" to false. For a custom, non-recognized
   singular form, set the "property_path" option like this: "plural|singular"
 * forms now don't create an empty object anymore if they are completely
   empty and not required. The empty value for such forms is null.
 * added constant Guess::VERY_HIGH_CONFIDENCE
 * [BC BREAK] FormType::getParent() does not see default options anymore
 * [BC BREAK] The methods `add`, `remove`, `setParent`, `bind` and `setData`
   in class Form now throw an exception if the form is already bound
 * fields of constrained classes without a NotBlank or NotNull constraint are
   set to not required now, as stated in the docs
 * fixed TimeType and DateTimeType to not display seconds when "widget" is
   "single_text" unless "with_seconds" is set to true
 * checkboxes of in an expanded multiple-choice field don't include the choice
   in their name anymore. Their names terminate with "[]" now.
 * [BC BREAK] FormType::getDefaultOptions() and FormType::getAllowedOptionValues()
   don't receive an options array anymore.
 * deprecated FormValidatorInterface and substituted its implementations
   by event subscribers
 * simplified CSRF protection and removed the csrf type
 * deprecated FieldType and merged it into FormType
 * [BC BREAK] renamed theme blocks
   * "field_*" to "form_*"
   * "field_widget" to "form_widget_single_control"
   * "widget_choice_options" to "choice_widget_options"
   * "generic_label" to "form_label"
 * added theme blocks "form_widget_compound", "choice_widget_expanded" and
   "choice_widget_collapsed" to make theming more modular
 * ValidatorTypeGuesser now guesses "collection" for array type constraint
 * added method `guessPattern` to FormTypeGuesserInterface to guess which pattern to use in the HTML5 attribute "pattern"
 * deprecated method `guessMinLength` in favor of `guessPattern`
 * labels don't display field attributes anymore. Label attributes can be
   passed in the "label_attr" option/variable