Where is the code that shows (in the browser) the form for add_entry()? I've used Flask, and for a task like this, you typically have to have either one method

Where is the code that shows (in the browser) the form for add_entry()? I've used Flask, and for a task like this, you typically have to have either one method which is decorated with a route that takes a list of two method args, "get" and "post" in a list, and then have an if statement to distinguish between code to display the form (get code) and code to process the data on submit (post code), or two separate methods, which could be called get and post or get_entry and post_entry. But your get method does not show a form; it displays all the entries.