Best method for using writers with multiple primary keys?

[Tim Toady]

So if I have a store that needs a writer, and the table the data is taken from has multiple primary keys, what is the best method for implementing the store?

If I use one of the primary keys as the ID, if I delete something I wont have sufficient data when the writer sends it back to the backend. I could concat the primary keys as an ID and then splice them on the backend, but that is ugly. Is there a better solution to the issue?

[Keylan]

Just a shot in the dark here, but does setting writeAllFields on the writer send all field for deleted records as well as updated records?

[Tim Toady]

I believe it is only update

[Keylan]

I can only offer suggestions as I do not have time to try it myself :-\

But perhaps overwriting the destroyRecord method for your writer to include more than the id will do it?:

    destroyRecord : function(rec){
        if(this.encodeDelete){
            var data = {};
            data[this.meta.idProperty] = rec.id;
            return data;
        }else{
            return rec.id;
        }
    }