Best practice app_tables.TABLES.add_row vs dinamically getattr(app_tables, table_name)

[stefano.menci]

@matteo.lavaggi

I’m a bit confused because anvil row object seem wonderful, but completely lack the possibility to execute validation before passing data to database ! Why? 100% there is no option where we can setup and call validation function on row object update logic (the one handled by anvil with magic)?

Why?

Because other no-code or low-code platforms expose a million settings, they require you to spend months learning them, and they decide what you can do.

Anvil is an only-code platform. There are settings, but the most important thing is the code you write. You decide whether to add your checks and validation, and how to make them. You do need to learn a few settings and a few magic behaviors, like database row and iterators, or repeating panels, but the learning curve is much shorter (in my experience) and once you learned those the sky is the limit.

@matteo.lavaggi

Can you write an example of a complete script (class and function) you use server side and client side? This will help me better understand how to write good anvil application

Yeah, I will, but right now I have a day job .

Here is a quick description of how I do validation.

In this old post I describe some of my best practices. Emphasis on “my”!