String rules

String rules accept primitive values: strings, numbers and booleans. Numbers are validated as strings. All of them return FORMAT_ERROR for objects and lists.

stringChecks that the value is a primitive type and converts it to a string, for example 25 becomes "25". Prefer stricter rules where possible.'string'FORMAT_ERROReqChecks that the value is equal to the given one. Values are compared as strings, and the output is the value from the rule.{ eq: 'Anton' }NOT_ALLOWED_VALUEone_ofChecks that the value is one of the allowed values. Values are compared as strings, and the output is the value from the rule.{ one_of: ['a', 'b'] }NOT_ALLOWED_VALUEmax_lengthChecks that the string is not longer than the given number of characters.{ max_length: 10 }TOO_LONGmin_lengthChecks that the string is at least the given number of characters long.{ min_length: 2 }TOO_SHORTlength_betweenChecks that the length of the string is between the two values, inclusive.{ length_between: [2, 10] }TOO_LONGTOO_SHORTlength_equalChecks that the string is exactly the given number of characters long.{ length_equal: 2 }TOO_LONGTOO_SHORTlikeChecks that the value matches a regular expression.{ like: '^\\d+$' }WRONG_FORMAT