子文档的猫鼬复杂查询

Question

我需要通过 Owner、Manager 或 Team Member 之一找到一个项目。架构如下所示：

var project = new mongoose.Schema({
  title: { type: String, require: true },
  slug: { type: String, require: true },
  description: { type: String, require: true },
  descriptionHtml: { type: String, require: true },
  nextVanityId: { type: Number, default: 1 },
  owner: { type: ObjectId, ref: 'Member', require: true },
  teams: [{ type: ObjectId, ref: 'Team' }],
  managers: [{ type: ObjectId, ref: 'Member' }]
};

var team = new mongoose.Schema({
  name: { type: String, require: true },
  slug: { type: String, require: true },
  project:  { type: ObjectId, require: true, ref: 'Project' },
  created: { type: Date, require: true, default: Date.now },
  members: [{ type: ObjectId, default: null, ref: 'Member' }]
};

我的查询方法是这样的：

function findByMember (member, done) {
  var id = member._id;

  Project
    .find()
    .or([
      { owner: id },
      { managers: id },
      { 'teams.members': id }
    ])
    .exec(done);
}

目前它对所有者和经理都适用，但我在查询每个团队的成员集合时出现空白。我应该使用什么？

Answer 1

为了使您的查询有效，您可以通过两种方式解决问题。

解决方案 1

将您的团队作为项目中的嵌入式文档：

var team = new mongoose.Schema({
  name: { type: String, require: true },
  slug: { type: String, require: true },
  project:  { type: ObjectId, require: true, ref: 'Project' },
  created: { type: Date, require: true, default: Date.now },
  members: [{ type: ObjectId, default: null, ref: 'Member' }]
};

var project = new mongoose.Schema({
  title: { type: String, require: true },
  slug: { type: String, require: true },
  description: { type: String, require: true },
  descriptionHtml: { type: String, require: true },
  nextVanityId: { type: Number, default: 1 },
  owner: { type: ObjectId, ref: 'Member', require: true },
  teams: [team],
  managers: [{ type: ObjectId, ref: 'Member' }]
};

这样您的项目文档将包含团队信息并且 teams.members 有意义。

解决方案 2

对您的 Team 数据进行非规范化，使其仅嵌入相关信息：

var team = new mongoose.Schema({
  name: { type: String, require: true },
  slug: { type: String, require: true },
  project:  { type: ObjectId, require: true, ref: 'Project' },
  created: { type: Date, require: true, default: Date.now },
  members: [{ type: ObjectId, default: null, ref: 'Member' }]
};

var project = new mongoose.Schema({
  title: { type: String, require: true },
  slug: { type: String, require: true },
  description: { type: String, require: true },
  descriptionHtml: { type: String, require: true },
  nextVanityId: { type: Number, default: 1 },
  owner: { type: ObjectId, ref: 'Member', require: true },
  teams: [{
    _id: { type: ObjectId, ref: 'Team' },
    members: [{ type: ObjectId, default: null, ref: 'Member' }]
  }],
  managers: [{ type: ObjectId, ref: 'Member' }]
};

在第二种方法中，您需要保持 Team 文档和非规范化数据同步。

子文档的猫鼬复杂查询

Mongoose Complex Query by Subdocument

mongoose

mongodb

node.js

解决方案 1

解决方案 2