[TYPO3-mvc] Working with input-fields but without saving to DB

[Marc Bastian Heinrichs]

Hey,

> I have to create a form to calculate the BMI and some other things.
> I want to use the validator annotations to give feedback to the user if 
> a field was not filled. But this annotations are made in the model-class 
> and a model tries to store data in the db.
> 
> So how to tell my model to NOT store a field or a model to db?

If there is no TCA definition for a field, the data would not be saved.
A new object of a model would only be saved if it is added to the
corresponding repository object.

Best
Marc Bastian