MongoDB 在对象数组中进行全文搜索

Question

我有一个这样的架构：

const AyoSchema = new Schema({
images: Array,

Images 是一个数组，其中存储的对象格式如下：

{
id: a uuid here, 
name: a string here,
url: a url here, 
topic: a string here 
}

我想做的是，我想搜索图像数组中所有对象的名称属性，而不需要做太多索引工作，

我该怎么办？

Answer 1

有几种方法可以处理它。如果你只想 return 匹配的文档，那就有点复杂了。

我假设您只想 return 匹配的项目。为此，您需要使用聚合管道，特别是 $unwind 和 $match 运算符。

Check out a live demo here

考虑以下因素：

数据库

[
  {
    _id: ObjectId("111111111111111111111111"),
    images: [
      {
        id: ObjectId("123123224454323123121314"),
        name: "foo",
        url: "cdn.domain.com/images/foo",
        topic: "lorem ipsum"
      },
      {
        id: ObjectId("222123224454323123121314"),
        name: "bar",
        url: "cdn.domain.com/images/bar",
        topic: "lorem ipsum"
      },
      {
        id: ObjectId("333323224454323123121314"),
        name: "baz",
        url: "cdn.domain.com/images/baz",
        topic: "lorem ipsum"
      }
    ]
  },
  {
    _id: ObjectId("222222222222222222222222"),
    images: [
      {
        id: ObjectId("888823224454323123121314"),
        name: "text",
        url: "cdn.domain.com/images/text",
        topic: "lorem ipsum"
      },
      {
        id: ObjectId("999993224454323123121314"),
        name: "foo",
        url: "cdn.domain.com/images/pic",
        topic: "lorem ipsum"
      }
    ]
  }
]

查询

db.collection.aggregate([
  {
    $unwind: "$images"
  },
  {
    $match: {
      "images.name": "foo" // <-- replace "foo" with your query
    }
  }
])

结果

[
  {
    "_id": ObjectId("111111111111111111111111"),
    "images": {
      "id": ObjectId("123123224454323123121314"),
      "name": "foo",
      "topic": "lorem ipsum",
      "url": "cdn.domain.com/images/foo"
    }
  },
  {
    "_id": ObjectId("222222222222222222222222"),
    "images": {
      "id": ObjectId("999993224454323123121314"),
      "name": "foo",
      "topic": "lorem ipsum",
      "url": "cdn.domain.com/images/pic"
    }
  }
]

更新

包括正则表达式。

Live demo

查询

db.collection.aggregate([
  {
    $unwind: "$images"
  },
  {
    $match: {
      "images.name": {
        "$regex": "fo*"
      }
    }
  }
])

MongoDB 在对象数组中进行全文搜索

MongoDB Full Text Search in an Array of objects

arrays

full-text-search

mongoose

mongodb

数据库

查询

结果

更新

查询