Model and Form

I tend to keep all of data operations in the models. Read the input with the controller, and pass it into the model. Then let model do with the data what it needs to do. This also includes preparing an array for database insert.

Kind of new to MVC here, so trying to understand. If you read the input with the controller and then pass it to the model, don't you have to put it in an array? And if you validate the input in the controller, and then put it in an array, isn't the data already prepared for database insert?

I understand the concept of pushing logic down the hierarchical chain. That was a rule even under structured programming. But code reuse was not big under structured programming. If you make a method in a model do "too much," doesn't it become single purpose. How do you balance that?