优化履约路由回退策略

apps/backend/src/services/fulfillment/routing-config-service.test.ts

@@ -94,6 +94,34 @@ test('resolveFulfillmentRoute 商品规则可以强制走 feifei', () => {
   assert.equal(result.reason, '命中商品路由规则')
 })
 
+test('resolveFulfillmentRoute 商品规则目标不可用时回退全局优先级', () => {
+  const result = resolveFulfillmentRoute({
+    productName: '套装-糯粉咩咩',
+    candidates: [
+      { executorKey: 'kuaishou_ct_assisted', available: true },
+      { executorKey: 'kuaishou_feifei', available: true },
+      { executorKey: 'affiliate_dash', available: false, reason: '未命中 affiliate-dash sku 映射' },
+    ],
+    config: normalizeFulfillmentRoutingConfig({
+      rules: [
+        {
+          enabled: true,
+          productName: '套装-糯粉咩咩',
+          executorKey: 'affiliate_dash',
+          priority: 200,
+        },
+      ],
+    }),
+  })
+
+  assert.equal(result.selectedExecutorKey, 'kuaishou_ct_assisted')
+  assert.equal(result.reason, '商品路由规则目标不可用，按全局优先级回退')
+  assert.deepEqual(result.skipped[0], {
+    executorKey: 'affiliate_dash',
+    reason: '未命中 affiliate-dash sku 映射',
+  })
+})
+
 test('resolveFulfillmentRoute 商品规则可以强制转人工', () => {
   const result = resolveFulfillmentRoute({
     productName: '临时停用商品',

apps/backend/src/services/fulfillment/routing-config-service.ts

@@ -185,9 +185,22 @@ export function resolveFulfillmentRoute({
       return selected
     }
 
+    const fallback = resolveByExecutorPriority({
+      priority: normalizedConfig.defaultExecutorPriority.filter(
+        (executorKey) => executorKey !== matchedRule.executorKey,
+      ),
+      candidates: normalizedCandidates,
+      config: normalizedConfig,
+      skipped,
+      reasonPrefix: '商品路由规则目标不可用，按全局优先级回退',
+    })
+    if (fallback.selectedExecutorKey) {
+      return fallback
+    }
+
     return {
       ...selected,
-      reason: selected.reason || '商品路由规则目标通道不可用',
+      reason: selected.reason || '商品路由规则目标通道不可用，且未命中其他履约通道',
     }
   }