使用mongoose进行mongo db文本搜索

Question

我正在使用mongo db nodejs和mongoose.

我想用mongodb新文本搜索.

尝试像aaronheckmann一样使用mongoose-text-search,但我不断收到错误.

var mongoose = require("mongoose");
var Schema  = mongoose.Schema;
var ObjectId = Schema.ObjectId;
var Items = new Schema({
   type            : { type : String , default:""},
    color           : { type : [String] , default:""},
   category_A      : { type : String , default:""},
    category_B      : { type : String , default:""},
    category_C      : { type : String , default:""},
});
var textSearch = require("mongoose-text-search");
Items.plugin(textSearch);
var ItemModel = mongoose.model('Item', Items);
Items.index({
    type            :"text",
    color           :"text",
   category_A      :"text",
    category_B      :"text",
    category_C      :"text"
},
   {
        name: "best_match_index",
       weights: {
            type: 5,  
            color:   4,
      }
    }
)
ItemModel.textSearch('D', function (err, output) {
    if (err) 
    console.log(err);
    else
    console.log(output)
})

运行时,我得到:

no text index for: db.items

谢谢!

Answer 1

在将模式注册为模型之前,必须将插件添加到模式中.

更新

同样,您需要在注册模型之前在架构上定义索引.因此,重新排序代码的这一部分,如下所示:

var textSearch = require("mongoose-text-search");
Items.plugin(textSearch);
Items.index({
    type            :"text",
    color           :"text",
    category_A      :"text",
    category_B      :"text",
    category_C      :"text"
}, {
    name: "best_match_index",
    weights: {
        type: 5,  
        color: 4
    }
});
var ItemModel = mongoose.model('Item', Items);

请注意,您还需要通过mongoose.connect我在任何地方都看不到的调用将mongoose连接到数据库,但我假设您正在执行此代码范围之外的操作.这是我用来确认这个工作的完整代码:

var mongoose = require("mongoose");
var Schema  = mongoose.Schema;
var ObjectId = Schema.ObjectId;
var Items = new Schema({
    type            : { type : String , default:""},
    color           : { type : [String] , default:""},
    category_A      : { type : String , default:""},
    category_B      : { type : String , default:""},
    category_C      : { type : String , default:""},
});
var textSearch = require("mongoose-text-search");
Items.plugin(textSearch);
Items.index({
    type            :"text",
    color           :"text",
    category_A      :"text",
    category_B      :"text",
    category_C      :"text"
}, {
    name: "best_match_index",
    weights: {
        type: 5,
        color: 4,
    }
});
var ItemModel = mongoose.model('Item', Items);

mongoose.connect('mongodb://localhost/test', function (err) {
  ItemModel.textSearch('D', function (err, output) {
    if (err)
      console.log(err);
    else
      console.log(output);
    mongoose.disconnect();
  });
});

创建的文本搜索索引在shell中如下所示:

test> db.items.getIndexes()
[
  {
    "v": 1,
    "key": {
      "_id": 1
    },
    "ns": "test.items",
    "name": "_id_"
  },
  {
    "v": 1,
    "key": {
      "_fts": "text",
      "_ftsx": 1
    },
    "ns": "test.items",
    "name": "best_match_index",
    "weights": {
      "category_A": 1,
      "category_B": 1,
      "category_C": 1,
      "color": 4,
      "type": 5
    },
    "background": true,
    "safe": null,
    "default_language": "english",
    "language_override": "language",
    "textIndexVersion": 1
  }
]

Answer 2

npm install mongoose-text-search

https://github.com/aheckmann/mongoose-text-search

http://plugins.mongoosejs.com是发现其他猫鼬功能的好地方