StringNode<T extends String> class

A fluent builder for validating String values.

Use this class via Checkit.string to compose validations in a readable, chained style.

Example:

final result = Checkit.string
  .min(5)
  .max(10)
  .email()
  .validateOnce('test@example.com');

if (!result.isValid) {
  print(result.firstError);
}
Inheritance

Constructors

StringNode(ValidationContext _config)

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

alpha({String? error}) → StringNode<T>
Validates that the string contains only alphabetic characters (a-z, A-Z).
alphanumeric({String? error}) → StringNode<T>
Validates that the string contains only letters and digits.
any(List<Validator<T>> validators, {String? error}) → StringNode<T>
inherited
build({ValidationContext? context}) → ValidatorSet<T>
Finalizes the validator into a reusable set.
inherited
clone({ValidationContext? context}) → StringNode<T>
Clones this node with an optional different context.
override
contains(String data, {String? error}) → StringNode<T>
Validates that the string contains the data substring.
custom(bool validate(T value, ValidationContext context), {String error = ''}) → StringNode<T>
Adds a custom validator using a function.
inherited
dateTime(String format) → StringDateNode<String>
Returns a StringDateNode that validates a specific date format.
dateTimeAuto({String? preferredFormat}) → StringDateNode<String>
Tries to automatically infer the date format from input.
dateTimeIso() → StringDateNode<String>
Validates an ISO 8601 date-time string.
email({String? error}) → StringNode<T>
Validates that the string is a valid email address.
endsWith(String suffix, {String? error}) → StringNode<T>
Validates that the string ends with the specified suffix.
equals(String expectedString, {String? error}) → StringNode<T>
Validates that the string is exactly equal to expectedString.
every(List<Validator<T>> validators, {String? error}) → StringNode<T>
inherited
exact(int length, {String? error}) → StringNode<T>
Validates that the string has exactly length characters.
hasRepeats({String? error}) → StringNode<T>
Validates that the string contains repeating characters in a row.
hasSymbols(String symbols, {String? error}) → StringNode<T>
Validates that the string contains at least one of the provided symbols.
ip() → IpNode<String>
Switches to IP-specific validation rules.
isDouble({String? error}) → StringNode<T>
Validates that the string can be parsed into a double.
isInt({String? error}) → StringNode<T>
Validates that the string can be parsed into an integer.
jwt({String? error}) → StringNode<T>
Validates that the string is a valid JWT token format (3 parts separated by .).
max(int length, {String? error}) → StringNode<T>
Validates that the string has no more than length characters.
min(int length, {String? error}) → StringNode<T>
Validates that the string has at least length characters.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
not(Validator<T> validator, {String? error}) → StringNode<T>
Negates another validator.
inherited
password() → PasswordNode<String>
Returns a PasswordNode with password-specific validation rules.
pattern(String pattern, {String? error}) → StringNode<T>
Validates that the string matches the given regex pattern.
range(int min, int max, {String? error, bool includeMin = true, bool includeMax = true}) → StringNode<T>
Validates that the string is within a specific range.
startsWith(String suffix, {String? error}) → StringNode<T>
Validates that the string starts with the specified prefix.
subnet(String cidr) → SubnetNode<String>
Switches to subnet-specific validation rules using CIDR.
toString() → String
A string representation of this object.
inherited
validateOnce(T? value, {bool? stopOnFirstError}) → ValidationResult
Quick validation without manually building the set.
inherited
withContext(ValidationContext context) → StringNode<T>
Shortcut to clone with updated context.
override

Operators

operator ==(Object other) → bool
The equality operator.
inherited