FieldValidator<T> class Null safety

Implementers

Constructors

FieldValidator(String errorText)

Properties

errorText String
the errorText to display when the validation fails
final
hashCode int
The hash code for this object. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

call(T value) String?
call is a special function that makes a class callable returns null if the input is valid otherwise it returns the provided error errorText
isValid(T value) bool
checks the input against the given conditions
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toString() String
A string representation of this object. [...]
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited