支持2级model

src/router.js

@@ -127,6 +127,10 @@ const createRoutes = async (app, modules, groups, basePath) => {
         modelBundle = await import(`./models/main/modules/${layout.route}`);
         modelBundle = modelBundle.default;
         registerModel(app, modelBundle);
+        const { subModels } = modelBundle;
+        if (subModels && subModels.forEach) {
+          subModels.forEach(m => registerModel(app, m));
+        }
         let routeBundle = await import(`./routes/main/modules/${layout.route}`);
         routeBundle = routeBundle.default || routeBundle;
         route.component = routeBundle;