Grails validation of a list objects

grails, grails-orm, grails-validation

Solution

If I'm understanding the question correctly, you want the error to appear on the Item domain object (as an error for the extraRecipients property, instead of letting the cascading save throw a validation error on the individual Contact items in extraRecipients, right?

If so, you can use a custom validator in your Item constraints. Something like this (this hasn't been tested but should be close):

static constraints = {
    extraRecipients( validator: { recipients ->
        recipients.every { it.validate() } 
    } )
}

You can get fancier than that with the error message to potentially denote in the resulting error string which recipient failed, but that's the basic way to do it.

Problem

I'm trying to get grails to validate the contents of a List of objects, might be easier if I show the code first: ``` class Item { Contact recipient = new Contact() List extraRecipients = [] static hasMany = [ extraRecipients:Contact ] static constraints = {} static embedded = ['recipient'] } class Contact { String name String email static constraints = { name(blank:false) email(email:true, blank:false) } } ``` Basically what i have is a single required Contact ('recipient'), this works just fine: ``` def i = new Item() // will be false assert !i.validate() // will contain a error for 'recipient.name' and 'recipient.email' i.errors ``` What I'd like also do it validate any of the attached `Contact` objects in 'extraRecipients' such that: ``` def i = new Item() i.recipient = new Contact(name:'a name',email:'email@example.com') // should be true as all the contact's are valid assert i.validate() i.extraRecipients << new Contact() // empty invalid object // should now fail validation assert !i.validate() ``` Is this possible or do I just have to iterate over the collection in my controller and call `validate()` on each object in `extraRecipients`?

Original source