If you're passing the id as a route parameter, you can do something as simple as this:

$this->id;

If you are passing it as an input, then you can do either one of these methods:

$this->get('id');
$this->input('id');

Not passing any ID's, just the slug. So I guess I need to do a where request to get the ID.

But when I try: 'title'=>'required|between:3,20|unique:subjects,title,'.Subject::whereTitle($this->get('title'))->first()->id, (title is unique too) I get: Trying to get property of non-object

Whenever anything other than the current title is entered.

Edit: I'll just pass the ID as a route through a hidden field, guess its simpler.

Thank-you

If you want to check the title, you can do this though.

'title'=>'required|between:3,20|unique:subjects,title,' . $this->get('title') . ',title',

So, to break this down, it basically does this.

1. The title has to be unique in the subjects table and in the title column.
2. $this->get('title') gets the title that you are passing in from the form.
3. Normally, people pass the id and so Laravel automatically assumes that whatever argument you are passing is the id of the table. However, since you are passing in the title (not the id), you have to specify that at the end.