Hi, I am a little bit stuck. I have been commanded to do an exersice which states in one of the steps to associate a method with an instance (as I understood), here a closer explanation: I have a model, wich have different methods, each of them execute some tests given that model's instance fields. Then, I have another model which I should be able to associate with one of the tests, and to return some data according to what the associated method (test) return when called. I still do not know If i misunderstood the instructions or something like that, what I was thinking was just a foreignKey on the second model to associate it with the first one, and then, how could I make sure that model is associated with just one of the methods over the other model?? Or there is another way to do this, associate a modelfield with a given method?? Thanks a lot in advance!