Localizing validation (error) messages in Grails

I try to localize error messages from the Domain classes. This is possible with the default error messages, e.g.:

default.blank.message=Property [{0}] cannot be blank

and localized attribute names, e.g.:

customer.address.label=Customer address

Where "Customer" is my domain class and address is its attribute.

My problem is that I can't localize some attributes because I need specific error messages. E.g:

has.to.be.a.number=Property [{0}] has to be a number

contingent.size.label=Contingent size.

But the message I get is "Property [size] has to be a number" instead of "Property [Contingent size] has to be a number".

The messages I cant localize are following:

• Property [{0}] has to be a number
• Property [{0}] has to be a valid date // I can't use g:datePicker in this context

---

I add some other example with some other domain class which also doesn't work

package cz.quanti.spaportal.touristOffice

import ...

class Touri开发者_如何学JAVAstOffice {  
    String customerNumber  
    int minimalContingent  
    Address address  
    User user  
    ContactPerson contactPerson  

    static hasMany = [contingents: Contingent]

    static constraints = {  
        customerNumber(unique:true, nullable: true, blank: true)  
        user(nullable: true, blank: true)  
        contactPerson(nullable: false)  
        minimalContingent(min: 0)  
        address(nullable: false)  
    }

Only the "minimalContingent" is not localized: (the message is localized and the minimal attribute is not) Property [minimalContingent] has to be a number.

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If you are having problem with validation messages you can always check the codes for the validation errors using the errors collection on an instance.

Customer c = ...

c.validate()

c.errors.each { println it }
c.errors.getFieldError("address").codes.each { println it }
c.errors.getFieldError("address").defaultMessage

Write a unit test to check the codes to localise the messages.

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Make sure you're using the domain class package in your definitions. Also check your capitalization; I'm not sure if it makes a difference, but my successful messages.properties using labels have looked akin to the following:

// messages.properties
com.example.Customer.address.label=Customer address
com.example.Contingent.size.label=Contingent size

// or if you're using the default package
Customer.address.label=Customer address
...

---

After your update, can you clarify something? Do you have the following in your messages.properties:

cz.quanti.spaportal.touristOffice.TouristOffice.minimalContingent.label=...

If not, does it work if you add it?

---

I think that the whole path to the attribute (without "label" in the end) should work for you. Looks like this:

com.example.Customer.homeAddress=Customer address

remember to use lowercase and uppercase where they are needed!