javascript - Mongoosejs .find 返回整个模型而不是文档

Question

这个问题已经有答案了:

How do you turn a Mongoose document into a plain object? (9 个回答)

mongoose .find() method returns object with unwanted properties (5 个回答)

How can I display a JavaScript object? (40 个回答)

Model.findOne not returning docs but returning a wrapper object (1 个回答)

已关闭 3 年前。

我正在现有模型上运行 .find() 查询。我过去使用过这段代码并且没有进行任何更改，但现在突然由于某种原因它不起作用。我认为 MongoDB 或 MongooseJS 已更新并且功能已更改。

var retrieve = function() {
  Repo.find({}, function(err, docs) {
    console.log(docs)
  })
};

retrieve();

返回

[
  model {
    '$__': InternalCache {
      strictMode: true,
      selected: {},
      shardval: undefined,
      saveError: undefined,
      validationError: undefined,
      adhocPaths: undefined,
      removing: undefined,
      inserting: undefined,
      version: undefined,
      getters: {},
      _id: 5e02e91c908f0f086e737189,
      populate: undefined,
      populated: undefined,
      wasPopulated: false,
      scope: undefined,
      activePaths: [StateMachine],
      pathsToScopes: {},
      ownerDocument: undefined,
      fullPath: undefined,
      emitter: [EventEmitter],
      '$options': true
    },
    isNew: false,
    errors: undefined,
    _doc: {
      __v: 0,
      stars: 2,
      id: 1322,
      url: 'url',
      name: 'name',
      _id: 5e02e91c908f0f086e737189
    },
    '$init': true
  },
  model {
    '$__': InternalCache {
      strictMode: true,
      selected: {},
      shardval: undefined,
      saveError: undefined,
      validationError: undefined,
      adhocPaths: undefined,
      removing: undefined,
      inserting: undefined,
      version: undefined,
      getters: {},
      _id: 5e02e92c3f6b72088246c563,
      populate: undefined,
      populated: undefined,
      wasPopulated: false,
      scope: undefined,
      activePaths: [StateMachine],
      pathsToScopes: {},
      ownerDocument: undefined,
      fullPath: undefined,
      emitter: [EventEmitter],
      '$options': true
    },
    isNew: false,
    errors: undefined,
    _doc: {
      __v: 0,
      stars: 2,
      id: 2,
      url: 'url1',
      name: 'name1',
      _id: 5e02e92c3f6b72088246c563
    },
    '$init': true
  }
]

它应该返回

[{name: 'name', id: 2, url: 'url', stars: 2},
{name: 'name1', id: 1322, url: 'url1', stars: 2}]

我不知道为什么会这样

---- 为 Ahsok 编辑 ---我尝试使用你的代码

const retrieve = () => {
  Repo.find({})
  .then(repo => {
    console.log({ repo })
  })
  .catch(error => {
    console.log({ error })
  })
};

而且它仍然没有返回它需要的结果。现在它回来了

{
  repo: [
    model {
      '$__': [InternalCache],
      isNew: false,
      errors: undefined,
      _doc: [Object],
      '$init': true
    },
    model {
      '$__': [InternalCache],
      isNew: false,
      errors: undefined,
      _doc: [Object],
      '$init': true
    }
  ]
}

这与上面返回的内容相同，只是格式略有不同

Answer 1

这是预期的行为， Mongoose 查找查询总是返回 Mongoose 的实例，即您所得到的。有两种方法可以处理这个问题:

1. 自行将您的响应转换为普通对象:

console.log(docs.toObject())

让 Mongoose 自己为你做这件事(使用lean):

Repo.find({}).lean().exec(function(err, docs) {
    console.log(docs);
});

您可以阅读有关精益的更多信息 here

希望这有帮助:)