# Options Validator

Determines accepted property values.

```javascript
var schema = new Schema({
  city: {
    options: ['Paris', 'Warsaw']
  }
});

console.log(utils.catchError(schema.validate, schema, [{city: 'Berlin'}])+'');
// "SchemaError: Passed city value is not acceptable"

console.log(schema.validate({city: 'Warsaw'}));
// true
```

If the object has been given, validator checks whether the tested value exists as an object key.

```javascript
var cities = {
  Paris: {
    country: 'France'
  },
  Warsaw: {
    country: 'Poland'
  }
};

var schema = new Schema({
  city: {
    options: cities
  }
});

console.log(utils.catchError(schema.validate, schema, [{city: 'Moscow'}])+'');
// "SchemaError: Passed city value is not acceptable"

console.log(schema.validate({city: 'Paris'}));
// true
```

    'use strict'

    assert = require 'src/assert'
    utils = require 'src/utils'

    module.exports = (Schema) -> (row, value, expected) ->
        assert.isObject expected
        , "options validator option for #{row} property must be an object or array"

        if Array.isArray(expected)
            passed = utils.has expected, value
        else
            passed = expected.hasOwnProperty value

        unless passed
            throw new Schema.Error row, 'options', "Passed #{row} value is not acceptable"