How do I fake a validation error?
-
26-09-2019 - |
Question
I'm using the Grails Webflow plugin. Here are the domain objects I'm working with:
class Foo implements Serializable {
String fooProp1,
fooProp2
static constraints = {
fooProp2 nullable: false
}
}
class Bar implements Serializable {
Foo fooObject
static constraints = {
fooObject nullable: false
}
}
At a point in the webflow, I need to make sure that fooObject.fooProp1 is not null. If it is, I want to throw an error and force the user to supply it with a value. I tried using validate() to do this (on both the Bar and Foo objects), but since fooProp1 has the nullable:true property, it passes validation. Any ideas?
Solution
You can probably do this in the Web Flow by adapting the following code:
if(fooObject.fooProp1 == null) {
fooObject.errors.rejectValue('fooProp1', 'nullable')
}
The second argument to that method, 'nullable'
, might be different for your situation. You'll just need to set it to the message code (from message.properties) to display the error message that you want.
Have a look here for more ways to use reject()
and rejectValue()
.