Create custom message

[tolbard]

Can we be able to override the specific validation error message by a other message.

For example:
username: s.optional(s.regex(/^(?=.*[a-z])[1-9a-z][0-9a-z]{3,19}$/i))

change to :
username: s.optional(s.regex(/^(?=.*[a-z])[1-9a-z][0-9a-z]{3,19}$/i, message:'Please follow this rules for your username: Alphanumeric characters only, maximum of 20 characters, minimum of 4 characters, at least one letter, first character cannot be 0, whitespace is not allowed'))

[rprieto]

That would be nice, especially for regexes. In your example, another option that's quite clean is to wrap it into a higher-level matcher, e.g. something like

var Username = s.createMatcher({
  initialize: function() {
    this.regex = s.regex(/^(?=.*[a-z])[1-9a-z][0-9a-z]{3,19}$/i);
  },
  match: function(path, value) {
    var errors = this.regex.match(path, value);
    if (errors) {
      return 'Please follow these rules for your username: ....';
    }
  }
});

// and then
var schema = {
  username: s.optional(new Username())
};

[lyricnz]

There's a PR on this - please consider
#118

[lyricnz]

#118 was merged. This can be closed.