Question

@Entity
@Table(uniqueConstraints = @UniqueConstraint(columnNames = { "field1", "field2"}))
public class A extends Model{

  public String field1;
  public String field2;
}

I would like to define my own check constraint by extending play.data.validation.Check so I can display a custom validation message.

However it seems that Check only applies to one field.
Is there another way to do this validation check on multiple fields?

UPDATE – Solution

 @Entity
 @Table(uniqueConstraints = @UniqueConstraint(columnNames = { "field1", "field2"}))
 public class A extends Model{

      @CheckWith(UniqueFieldsCheck.class)
      public String field1;
      public String field2;

    static class UniqueFieldsCheck extends Check {
        public boolean isSatisfied(Object obj, Object o) {
            boolean satisfied = true;
            A a = (A)obj;
            A aA = A.find("byField1AndField2", a.field1, a.field2).first();

            if (aA != null) {
                setMessage("This fields should be unique.");
                satisfied = false;
            }

            return satisfied;
        }
    }
 }

Answer 1

Well no, Play only let’s you validate on each field individually. However you can make you own composite field, that’s contained in a separate class and add it to you main object, something like:

public class A extends Model{

  @CheckWith(value = UniqueUserCheck.class, message = "error.not.unique")
  public ComplexField complexField;
}

public class ComplexField {

  public String field1;
  public String field2;

}

and then apply a custom validator to it (more on those here)