StartsWith class

A validation rule for checking if a value starts with a specified pattern.

The StartsWith class is a concrete implementation of the FormifyRule abstract class. It is used to validate whether a value starts with a specified pattern.

This rule checks if the input value starts with the provided pattern. If the value does not start with the pattern, an error message is generated.

Inheritance

• Object
• FormifyRule
• StartsWith

Constructors

StartsWith(String pattern)

Creates an instance of the StartsWith validation rule with a specified pattern.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

message ↔ String

Gets the error message associated with the StartsWith rule.

getter/setter pair, inherited-setter, override-getter

pattern → String

The prefix pattern to check for at the beginning of the value.

final

ruleKey → String

The unique key identifying the validation rule.

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

buildMessage(String attribute, String input, {String onExtra(String)?}) → String

Builds a validation error message by replacing placeholders in the error message template.

inherited

call(String attribute, String value) → String?

Validates whether a value starts with the specified pattern.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

key → const String

The unique identifier for the StartsWith validation rule.