MissingSchemaError:尚未为模型"Role“注册架构

const mongoose = require('mongoose');

const roleSchema = new mongoose.Schema({
  // 定义模型的属性
  // 例如：name, permissions等
});

const Role = mongoose.model('Role', roleSchema);

mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => {
    console.log('Connected to MongoDB');
    // 在这里使用模型
  })
  .catch((error) => {
    console.error('Error connecting to MongoDB', error);
  });

const Role = require('./models/role'); // 根据实际文件路径进行导入