validation

package validation

Contains the validation API used by Form.

For example, to define a custom constraint:

val negative = Constraint[Int] {
  case i if i < 0 => Valid
  case _ => Invalid("Must be a negative number.")
}

Source: package.scala

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Type Members

case class Constraint[-T](name: Option[String], args: Seq[Any])(f: (T) ⇒ ValidationResult) extends Product with Serializable

A form constraint.
A form constraint.
T
type of values handled by this constraint
name
the constraint name, to be displayed to final user
args
the message arguments, to format the constraint name
f
the validation function
trait Constraints extends AnyRef

Defines a set of built-in constraints.
case class Invalid(errors: Seq[ValidationError]) extends ValidationResult with Product with Serializable

Validation was a failure.
Validation was a failure.
errors
the resulting errors
case class ValidationError(messages: Seq[String], args: Any*) extends Product with Serializable

A validation error.
A validation error.
args
the error message arguments
sealed trait ValidationResult extends AnyRef

A validation result.

Value Members

object Constraint extends Serializable

This object provides helpers for creating Constraint values.
This object provides helpers for creating Constraint values.
For example:
```
val negative = Constraint[Int] {
  case i if i < 0 => Valid
  case _ => Invalid("Must be a negative number.")
}
```
object Constraints extends Constraints

Defines a set of built-in constraints.
object Invalid extends Serializable

This object provides helper methods to construct Invalid values.
object ParameterValidator
object Valid extends ValidationResult with Product with Serializable

Validation was a success.
object ValidationError extends Serializable

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