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Editorial Team
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Asked: 2026-06-15T15:37:10+00:00

My Model : @Entity(name = WORKFLOW_ROLE) public class WorkflowRole extends GenericModel { @Id @Column(name

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My Model:

@Entity(name = "WORKFLOW_ROLE")
public class WorkflowRole extends GenericModel {

   @Id
   @Column(name = "IDNR", unique = true, nullable = false, precision = 22, scale = 0)
   @Required
   @Min(0)
   public long id;
}

My Controller-Action:

public static void postNewRole(@Valid models.WorkflowRole role) {
    try
    {
      role.workflow = models.Workflow.findById(role.workflow.id);

      if (validation.hasErrors()) {
        params.flash(); // add http parameters to the flash scope
        validation.keep(); // keep the errors for the next request
        newRole();
      }

      role.create();
      flash.success("Rolle erstellt");
      index();
    }
    catch (Exception e)
    {
        params.flash();
        validation.keep();
        flash.put("error", e.getMessage());
        newRole();
    }
}

Now i get follwowing exception if i try to pass the WorkflowRole.id as a String in my form:

@6chopgia8
Internal Server Error (500) for request POST /workflowrole/postnewrole

Oops: UnexpectedException
An unexpected error occured caused by exception UnexpectedException: Unexpected Error

play.exceptions.UnexpectedException: Unexpected Error
    at play.data.validation.ValidationPlugin.beforeActionInvocation(ValidationPlugin.java:80)
    at play.plugins.PluginCollection.beforeActionInvocation(PluginCollection.java:639)
    at play.mvc.ActionInvoker.invoke(ActionInvoker.java:134)
    at Invocation.HTTP Request(Play!)
Caused by: play.exceptions.UnexpectedException: Unexpected Error
    at play.db.jpa.JPAPlugin.bind(JPAPlugin.java:84)
    at play.plugins.PluginCollection.bind(PluginCollection.java:579)
    at play.data.binding.Binder.bind(Binder.java:112)
    at play.mvc.ActionInvoker.getActionMethodArgs(ActionInvoker.java:651)
    at play.data.validation.ValidationPlugin$Validator.validateAction(ValidationPlugin.java:117)
    at play.data.validation.ValidationPlugin.beforeActionInvocation(ValidationPlugin.java:72)
    ... 3 more
Caused by: java.lang.NumberFormatException: For input string: "sdf"
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
    at java.lang.Long.parseLong(Long.java:410)
    at java.lang.Long.parseLong(Long.java:468)
    at play.data.binding.Binder.internalDirectBind(Binder.java:612)
    at play.data.binding.Binder.directBind(Binder.java:529)
    at play.db.jpa.JPAPlugin.bind(JPAPlugin.java:76)
    ... 8 more

Is anybody experiencing similar problems with the binding of generic models in play 1.2.5?

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1 Answer

  1. Editorial Team

    Edit: Yes, this appears to be a bug. Patch here: https://gist.github.com/4242156

    Try making your ID a Long instead of a long – I suspect this is why the binder crashes. There is special logic for primitive vars – and I think your case demonstrates a bug. However, I think if you switch to Long the code should work as expected.

    In general, you should avoid primitive values for database bound objects unless you can be 100% certain there are no null values in the database. (but your code should have worked – so there is a bug)

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