When working with a legacy database, there are cases when I can't set up the relations properly using `belongs_to` annotation. In this case, I tried to define an attribute pointing to another `Model` class with its accessors methods as follows:

```
@Table("INTERVENTION")
@IdName("ITV_ID")
public class Intervention extends Model {
  private InterventionModel interventionModel;

    public InterventionModel getInterventionModel() {
        return interventionModel;
    }

    public void setInterventionModel(InterventionModel interventionModel) {
        this.interventionModel = interventionModel;
    }
}

```

I'm loading and setting `InterventionModel`in a service class without problems as follows (`intervention` instance exists):

```
private void loadInterventionModel(final Intervention intervention) {
        final InterventionModel model = InterventionModel.findById(intervention.getLongId());
        intervention.setInterventionModel(model);
    }

```

The problem is that it does not work when I try to assess `InterventionModel` attributes in the FreeMarker template:

```
"item_code:": ${intervention.intervention_model.imo_internal_code}

```

Here is the flushed error:

```
FreeMarker template error:
An error has occurred when reading existing sub-variable "intervention_model"; see cause exception! The type of the containing value was: extended_hash+string (app.models.Intervention wrapped into f.e.b.StringModel)

Caused by: java.lang.IllegalArgumentException: Attribute: 'intervention_model' is not defined in model: 'class app.models.Intervention.

```

What am I missing here and why it does not work as expected ?
Generally, if I declare an attribute in the model with its accessors (getter and setter), will it be accessible in the template with:

```
mymodel.my_attribute

```