toJson method

@override String? toJson()

Serializes the string value to JSON format.

Returns the raw string value, which may be null if no value has been set. This allows the JSON representation to distinguish between an explicitly set empty string "" and an unset (null) value.

Returns: The string value, or null if no value has been set.

Example:

final field = JsonString('name');
print(field.toJson()); // null

field.value = 'John';
print(field.toJson()); // 'John'

field.value = '';
print(field.toJson()); // '' (empty string)

Implementation

@override
String? toJson() {
  return rawValue;
}