模型导出不是问题。我遇到过同样的问题。
真正的问题是需要模型声明
var mongoose = require('mongoose');mongoose.connect('mongodb://localhost/news');require('./models/Posts');require('./models/Comments');低于路线依赖关系。只需将mongoDB依赖关系移到路由依赖关系之上。它应该是这样的：
// MongoDBvar mongoose = require('mongoose');mongoose.connect('mongodb://localhost/news');require('./models/Posts');require('./models/Comments');var routes = require('./routes/index');var users = require('./routes/users');var app = express();
