Grails: Property Null error

Question

I've a domain called Modulo with some properties and a Controller with a method that create a object from model and save it, when execute save the shell show this error:

La propiedad [{0}] de la clase [{1}] no puede ser nulo

But if i set the constraint nullable to true, the error show again. I think that i should not set this cosntraint.

The model is linked to a mysql table with all properties except id allow null.

I think I am not doing something wrong here. Any advice??

Domain: Modulo

class Modulo {
    String nombre
    String icon
    String url




//static constraint = {
  //    url(nullable:true)
  //}

  }

Controller: Example

class ExampleController {
    def index = { 
       def modulo = new Modulo(
         nombre:'xxx',
         icon:'xxx'
        )

        if (modulo.save()){
          println 'ok'
        }else{
          modulo.errors.allErrors.each { println it.defaultMessage}
        }
    }
}

Thanks. José

Jose, by default the nullable constraint is set to false, I see that you have the constraint commented in your question about, is that really the case? Do you have the nullable constraint for url set to true? Because if it is not set then it makes sense you are getting that error when saving. — Maricel, Mar 17 '11 at 21:35

score 3 · Accepted Answer · edited Jul 23 '13 at 18:17

3

Finally I resolved the error. That doesn't save because constrain was write wrong.

Error Code

 static constraint = {
     url(nullable:true)
 }

Good Code

static constraints = {
     url(nullable:true)
 }

Thanks all for yours answers. :P

edited Jul 23 '13 at 18:17

corvec

288
4
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answered Mar 19 '11 at 00:08

richardhell

969
2
10
22

score 0 · Answer 2 · answered Mar 18 '11 at 03:18

But if i set the constraint nullable to true, the error show
again. I think that i should not set this cosntraint.

The nullable constraint works fine for me. If you don't specify it, you are surely get the error because that nullable=false in default.

Please try turn on the nullabe:true, and the restart Grails.

The model is linked to a mysql table with all properties except id allow null.

Actually, you don't need a pre-defined table, but if you do, I think it's best to NOT allow null at id field.

Hello @HoàngLong I turn constraints nullabe to true and restart the server but the error continue showing. — richardhell, Mar 18 '11 at 23:40

Grails: Property Null error

2 Answers2