AtLeastOneExistsRule

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 constructor(…properties: string[])

• properties: string[] - list of property names where at least one property must exist

Instance methods

validate

Validates a given value against this rule.

public validate(path: string, schema: Schema, value: any, results: ValidationResult[]): void

• path: string - dot notation path to the value.
• schema: Schema - schema this rule is called from.
• value: any - value to be validated.
• results: ValidationResult[] - list with validation results.

Examples

let 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

• IValidationRule