[SOLVED] How to avoid 'Cannot read write-only property' using bindable constraint on transient

How to avoid 'Cannot read write-only property' using bindable constraint on transient

I'm having trouble to bind values using a transient property using grails 3.1.4.

Taking this domain as an example:

class Domain {
    Boolean b1
    Boolean b2
    Boolean b3

    void setPropertyList(propertyList) {
        if(propertyList.contains('someValue'))
            this.b1 = true         
    }

    static transients = ['propertyList']

    static constraints = {
        propertyList bindable: true
    }
}

I would like to use a specific property (here: propertyList) for data binding. This property is available in the data binding source, but not in my domain. So I added a transient and a setter. To include the transient propertyList for data binding I added the bindableconstraint.

The setter setPropertyList is called during data binding. The properties of the resulted domain instance has all properties set as expected. But when I try to save the resulted instance I get the following exception:

groovy.lang.GroovyRuntimeException: Cannot read write-only property: propertyList
    at org.grails.validation.ConstrainedPropertyBuilder.doInvokeMethod(ConstrainedPropertyBuilder.java:74)

Looks like grails having some trouble to validate the instance.

Any ideas how to fix this?

Solution

After some debugging it turns out, that grails couldn't find a type for propertyList and so skips the data binding.

Adding a getter helps grails to infer the type. This avoids the exception.

List<String> getPropertyList() {}