AtLeastOneExistsRule

Validation rule that checks that at least one of the object’s properties exists.

Implements: IValidationRule

Description

The AtLeastOneExistsRule class allows you to check that given a set of properties, at least one of them exists.

Constructors

Creates a new validation rule and sets its values

public AtLeastOneExistsRule(AtLeastOneExistsRule(String… properties))

  • properties: AtLeastOneExistsRule(String… properties) - list of property names where at least one property must exist

Instance methods

validate

Validates a given value against this rule.

public void validate(String path, Schema schema, Object value, List<ValidationResult> results)

  • path: string - dot notation path to the value.
  • schema: Schema - schema this rule is called from.
  • value: Object - value to be validated.
  • results: List<ValidationResult> - list with validation results.

Examples

{@code
  Schema schema = new Schema()
       .withRule(new AtLeastOneExistsRule("field1", "field2"));
 
  schema.validate({ field1: 1, field2: "A" });     // Result: no errors
  schema.validate({ field1: 1 });                  // Result: no errors
  schema.validate({ });                            // Result: at least one of properties field1, field2 must exist
  }

See also