Problem sending post data to model for insert/update

[eluser]Nicholai[/eluser]
Thanks bretticus. I do understand the idea of separating data manipulation (model), logic (controller), and presentation (view) and can insert data if I follow the example of the "blog in 20 minutes" video. However, the video does a $this->db->insert('table',$_POST) and bypasses models altogether. It doesn't show how to send anything to a model and I haven't found one in the user guide either.

When trying to use the code I wrote, I receive a "fatal error: Cannot access empty property" in my controller. Is there a basic, newbie example of a controller that gets individual pieces of post data from a form submit and sends it to a model function to be processed?