node.js - 无法设置未定义的属性(设置 'login' )

Question

看起来它不喜欢我设置嵌套架构的方式？

用户架构

const mongoose = require("mongoose");
    const twitchSchema = mongoose.Schema(
      {
        id: Number,
        login: String,
        display_name: String,
        type: String,
        broadcaster_type: String,
        description: String,
        profile_image_url: String,
        offline_image_url: String,
        view_count: Number,
        email: String,
        created_at: String,
        provider: String,
        accessToken: String,
        refreshToken: String,
      },
      { _id: false }
    );
    const userSchema = new mongoose.Schema({
      provider: {
        youtube: {},
        twitch: twitchSchema,
      },
    });
    module.exports = mongoose.model("User", userSchema);

这就是我创建新文档的方式

const userModels = new UserModels();
userModels.provider[profile.provider].login = profile.login;
const result = await userModels.save()

Answer 1

您应该始终在问题中添加您遇到的错误。我已经尝试过您的代码并收到未定义的引用错误:

// Schema setup

const mongoose = require('mongoose');
const twitchSchema = mongoose.Schema(
    {
        id: Number,
        login: String,
        display_name: String,
        type: String,
        broadcaster_type: String,
        description: String,
        profile_image_url: String,
        offline_image_url: String,
        view_count: Number,
        email: String,
        created_at: String,
        provider: String,
        accessToken: String,
        refreshToken: String,
    },
    { _id: false }
);
const userSchema = new mongoose.Schema({
    provider: {
        youtube: {},
        twitch: twitchSchema,
    },
});

module.export = mongoose.model('User', userSchema);

// Driver code
const u = new User();
console.log(u);

const profile = {
  provider: 'twitch',
  login: 'dummy_login',
};

u.provider[profile.provider].login = profile.login;
console.log(u);

const res = await User.create(u);
console.info(res);

// Error
// { _id: new ObjectId("624e8901dc46c217a1461c41") }
// TypeError: Cannot set property 'login' of undefined

所以问题出在用户模型中设置登录字段时。您应该像这样调整您的 userSchema:

const userSchema = new mongoose.Schema({
    provider: {
        youtube: {},
        twitch: { type: twitchSchema, default: {} },
    },
});

请参阅 Mongoose documentation here 。 现在，如果您运行以下驱动程序代码，它就可以在 mongo 中创建记录。

const u = new User();
console.log(u);

const profile = {
  provider: 'twitch',
  login: 'dummy_login',
};

u.provider[profile.provider].login = profile.login;
console.log(u);

const res = await User.create(u);
console.info(res);

查看下面的日志:

{ _id: new ObjectId("624e8a9990d90dea47e7f62a") }
{
  provider: { twitch: { login: 'dummy_login' } },
  _id: new ObjectId("624e8a9990d90dea47e7f62a")
}
{
  provider: { twitch: { login: 'dummy_login' } },
  _id: new ObjectId("624e8a9990d90dea47e7f62a"),
  __v: 0
}