minSize validation does not validate correctly on collections

[tmanthey]

Steps to Reproduce

1. define following domain class

class mytest {
def my_data = "123"
static hasMany = [childItems: mytest]
static constraints = {
childItems minSize: 1
}
}
2. execute the following code

def mytest = new mytest()
mytest.save(failOnError: true, flush: true)
def result = mytest.validate()

Expected Behaviour

According http://docs.grails.org/3.1.1/ref/Constraints/minSize.html

minSize: Sets the minimum size of a collection or number property

Hence result should be false

Actual Behaviour

result is true

Environment Information

• Operating System: Ubuntu 16.04
• GORM Version: gormVersion=6.1.10.RELEASE
• Grails Version (if using Grails): 3.3.8
• JDK Version: 1.8.0_201

[osscontributor]

If minSize is set to 2 and you add just 1 item, does validation fail?

[tmanthey]

If minSize is set to 2 and you add just 1 item, does validation fail?

Yes it fails as expected. Guess you know why you are asking ;-)

[osscontributor]

Guess you know why you are asking

Correct.