fromJson static method

FormSection? fromJson(dynamic value)

Returns a new FormSection instance and imports its values from value if it's a Map, null otherwise.

Implementation

// ignore: prefer_constructors_over_static_methods
static FormSection? fromJson(dynamic value) {
  if (value is FormSection) {
    return value;
  }
  if (value is Map) {
    final json = value.cast<String, dynamic>();

    // Ensure that the map contains the required keys.
    // Note 1: the values aren't checked for validity beyond being non-null.
    // Note 2: this code is stripped in release mode!
    assert(() {
      requiredKeys.forEach((key) {
        assert(json.containsKey(key), 'Required key "FormSection[$key]" is missing from JSON.');
        assert(json[key] != null, 'Required key "FormSection[$key]" has a null value in JSON.');
      });
      return true;
    }());

    return FormSection(
      icon: mapValueOfType<String>(json, r'icon'),
      title: mapValueOfType<String>(json, r'title'),
      columns: mapValueOfType<int>(json, r'columns'),
      formColumns: FormColumn.listFromJson(json[r'formColumns']) ?? const [],
    );
  }
  return null;
}