Update doesn't work via model method

[andrewebdev]

I'm having an issue where I'm obviously doing something wrong, or misunderstanding something.
If I change a value on a model directly, the view is updated correctly. However, if I try the same thing, via a method on the model interface, then nothing happens. The focussed attribute never changes.

See below:

Snippet from update()

		case key.Matches(msg, keys.Next):
			// m.focussed += 1   // This works
			cmd = m.Next()       // This does NOT work

Snippet from my model interface

func (m Model) Next() tea.Cmd {
	if m.focussed < 2 {
		m.focussed += 1
	} else {
		m.focussed = 0
	}
	return nil
}

[muesli]

func (m Model) Next() tea.Cmd {
...
}

This function is working on a copy of your Model. If you change it to a pointer receiver, it will correctly update:

func (m *Model) Next() tea.Cmd {
...
}

[andrewebdev]

Eish, my hand isn't big enough for the facepalm I deserve. That was a rookie mistake.

[muesli]

Don't worry, we've all been there 😃