Mongoose Model.find不是一个函数？

您的模块导出不正确

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var listSchema = new Schema({
    name: { type: String, default: datestring + " List" }
});

**mongoose.exports = mongoose.model('List', listSchema);** 

它应该是

**module.exports = mongoose.model('List', listSchema)**