Validators class
Provides a set of built-in validators that can be used by form fields.
A validator is a function that processes a FormField
and returns an error String or null. A null String means that validation has passed.
Constructors
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
-
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
Static Methods
-
compose(
List< FormFieldValidator< validators) → FormFieldValidator<String> >String> - Compose multiple validators into a single validator.
-
email(
String errorMessage) → FormFieldValidator< String> - Validator that requires the field's value pass an email validation test.
-
max(
double max, String errorMessage) → FormFieldValidator< String> - Validator that requires the field's value to be less than or equal to the provided number.
-
maxLength(
int maxLength, String errorMessage) → FormFieldValidator< String> - Validator that requires the length of the field's value to be less than or equal to the provided maximum length.
-
min(
double min, String errorMessage) → FormFieldValidator< String> - Validator that requires the field's value to be greater than or equal to the provided number.
-
minLength(
int minLength, String errorMessage) → FormFieldValidator< String> - Validator that requires the length of the field's value to be greater than or equal to the provided minimum length.
-
patternRegExp(
RegExp pattern, String errorMessage) → FormFieldValidator< String> - Validator that requires the field's value to match a regex pattern.
-
patternString(
String pattern, String errorMessage) → FormFieldValidator< String> - Validator that requires the field's value to match a regex pattern.
-
required(
String errorMessage) → FormFieldValidator< String> - Validator that requires the field have a non-empty value.