购物车商品来源于多商户，无法结算

pages/cart/index.vue

@@ -402,6 +402,16 @@
 				const app = this
 				if (app.checkedIds.length) {
 					const cartIds = app.checkedIds.join()
+					const merchant_ids = [];
+					app.list.forEach(item => {
+						if (app.checkedIds.includes(item.id) && !merchant_ids.includes(item.goods.merchant_id)) {
+							merchant_ids.push(item.goods.merchant_id);
+						}
+					});
+					if (merchant_ids.length > 1) {
+						app.$toast('结算商品来源于多少家商户，无法结算！');
+						return false;
+					}
 					// app.$navTo('pages/checkout/index', {
 					// 	mode: 'cart',
 					// 	cartIds