Working Person's Crockpot Country Pork Dinner

• 1 onion
• 1 cabbage
• 800 gr pork loin country-style ribs
• 575 gr potatoes (red)
• 375 gr apple cider
• 250 gr carrots
• 240 ml water
• 40 gr flour
• 30 ml oil
• 8 gr salt