Drupal\Core\Validation\Plugin\Validation\Constraint

Checks for the value being allowed.

Validates the AllowedValues constraint.

Complex data constraint.

Validates complex data.

Count constraint.

Count constraint.

Null constraint.

Null constraint validator.

Length constraint.

NotNull constraint.

NotNull constraint validator.

Supports validating all primitive types.

Validates the PrimitiveType constraint.

Range constraint.

Validator for the Drupal 'range' constraint.

Regex constraint.

Checks if an entity field has a unique value.

Validates that a field is unique for the given entity type.

Validates a UUID.