parameterized Grails validation messages

Question

In the messages.properties file in a Grails application I've seen examples of validation messages such as:

User.password.size=Size of bar must be between {0} and {1}

which applies to

class User {

    String password
    static constraints = {
        password(size:5..15)
    }
}

This example assumes that {0} is bound to the minimum size and {1} is bound to the maximum size, but I cannot find any documentation of which parameters may be used by error messages for each built-in constraint. In other words, what I'd like to know is: for each built-in constraint what is the meaning of {0}....{n}

Answer 1

I did some experimentation and I discovered that for a constraint such as:

class User {    
    String password
    static constraints = {
        password(size:5..15)
    }
}

The values of the placeholders are:

 0. Name of the class (User)
 1. Name of the property (password)
 2. Value of the property
 3. First constraint parameter (5)
 4. Second constraint parameter (15)
 5. etc.