I am currently trying to specify custom error messages in grails for the default constraints but so far all I get back is the default error message.
I know that I have to edit the grails-app/i18n/messages.properties file
If I change the following default error codes message, it will correctly display the new error message
default.blank.message=Property [{0}] of class [{1}] cannot be blank
However, this is not what I am trying to do. I need more granular error reporting and have more than one field that can be blank etc. What I would like to be able to do would be, display custom messages for each field in a class
package com.mycompany.myapp
class Test{
String name
def constraints = {
name(nullable:false, blank:false)
}
}
(following codes appended to end of messages.properties)
test.name.blank=Name cannot be blank
test.name.nullable=Name cannot be nullable
According to the grails documentation this should work correctly, either with or without the package name - className.propertyName.blank
grails.org/doc/latest/ (constraints section) & (section 7.4 - validation & internationalization)
I have tried all comnbinations that I can think of, but it always displays the custom message
I have also tried installing the grails i18n templates plugin
http://www.grails.org/I18n+Templates+Plugin
which generated the error codes automatically for me. I appended the new error codes to the end of the existing messages.properties file but I still get the default error messages.
However, there was something different with the error codes that were generated by the plugin.
instead of the format specified in the grails doc - test.name.null=......, it automatically generated test.name.null.error=Custom Message
I have also tried deleting the default error messages completely, but they are still displayed
If anyone has experienced this issue before, I would appreciate any help that anyone can give me
Thanks in advance
put def messageSource (in controller or service)
item.errors?.allErrors?.each{
println messageSource.getMessage(it, null)
};
I also found a good link which explains this better
http://johnrellis.blogspot.com/2010/02/retrieve-grails-domain-errors-from.html
Well, the documentation shows you an example of how to override the messages for one of the default Validation Constraints (blank, nullable, min, max, size, range, etc.). But it fails to tell you to look in the documentation for each Constraint and at the bottom it shows you what propery key to use:
Error Code: className.propertyName.size.toosmall or className.propertyName.size.toobig
for Constraint size http://grails.org/doc/latest/ref/Constraints/size.html
So, for
package com.example
class User {
String username
static constraints = {
username size:5..15
}
}
use:
com.example.User.username.size.toosmall=Yo there! too small: [{0}] of class [{1}] with value [{2}] does not fall within the valid size range from [{3}] to [{4}]
com.example.User.username.size.toobig=Yo there! too big: [{0}] of class [{1}] with value [{2}] does not fall within the valid size range from [{3}] to [{4}]
It might be that your constraints aren't static - it should be specified as "static constraints = { ..."
Also note that nullable defaults to false so you don't need to specify that.
I use fully qualified class names in my messages.properties
com.shareyourlove.User.password.blank=Some custom message
This worked for me
com.model.Customer.name.nullable.error = Custom message
instead of
com.model.Customer.name.blank = Custom message
来源：https://stackoverflow.com/questions/3250667/grails-problem-with-custom-error-messages