I had a running battle last year with peas and sweetcorn. The local mice were having parties on my plot with them :(
I planted direct only to find the next day every last one had been dug up and eaten.
So I planted in the greenhouse in pots and the little blighters found them in there too..... I eventually found a small hole in the greenhouse base, blocked it up and put jeyes fluid all around the greenhouse to stop the smells so they couldn't find their way back.... I also had a gardening glove chewed up and they had a store of marigold seeds collected under some empty pots :-X
I ended up with no peas and bought some sweetcorn seedlings in the end as by the time I'd managed to stop the parties it was too late to sow again to get a crop....My hubbie thought it was a battle of the wills...... I will try again this year...mousetraps at the ready. ;)