CODEWITHSUNDEEP
grails
user2782001
user2782001

Reputation: 3498

grails domain constraints is not a map at runtime like docs suggest

The docs say that depending on version, accessing Domain.constraints or Domain.constrainedProperties should give a Map of key values.

https://grails.github.io/grails2-doc/2.5.4/ref/Domain%20Classes/constraints.html

At runtime the static constraints property is a Map such that the keys in the Map are property names and the values associated with the keys are instances of ConstrainedProperty:

However, using 2.5+, accessing the constraints property at runtime doesn't give a map, but a closure, and I can't access the ConstrainedProperty instances.

I tried using grails class utils to access the static property also

GrailsClassUtils.getStaticFieldValue(Domain,"constraints")//this is still a closure

GrailsClassUtils.getStaticFieldValue(Domain,"constrainedProperties")//null, this property doesn't exist below version 3.0

Upvotes: 0

Views: 142

Answers (2)

Jeff Scott Brown
Jeff Scott Brown

Reputation: 27255

See the project at https://github.com/jeffbrown/constraintsmapdemo.

https://github.com/jeffbrown/constraintsmapdemo/blob/master/grails-app/domain/demo/Widget.groovy:

package demo

class Widget {
    int width
    int height
    static constraints = {
        width range: 1..100
        height range: 1..50
    }
}

The test at https://github.com/jeffbrown/constraintsmapdemo/blob/master/test/unit/demo/WidgetSpec.groovy passes:

package demo

import grails.test.mixin.TestFor
import spock.lang.Specification

@TestFor(Widget)
class WidgetSpec extends Specification {

    void "test accessing the constraints property"() {
        when:
        def propValue = Widget.constraints

        then:
        propValue instanceof Map
        propValue.containsKey 'width'
        propValue.containsKey 'height'
    }
}

If you are not using static compilation, Widget.constraints will evaluate to the Map. If you are using static compilation, Widget.getConstraints() will return the Map but Widget.constraints will evaluate to the closure.

Upvotes: 0

user2782001
user2782001

Reputation: 3498

Property access doesn't work for me like the example in the docs

Domain.constraints //returns closure

but using the method getter does

Domain.getConstraints() //returns the map

Upvotes: 2

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