我如何在 mongoosastic 上进行填充？

Question

我的目标是填充 mongoosastic 搜索中的某些字段，但如果我执行以下代码，它总是会返回

这是代码

var mongoose = require('mongoose');
var Category = require('./category');
var mongoosastic = require('mongoosastic');
var Schema = mongoose.Schema;

var ProductSchema = new Schema({
  category: { type: Schema.Types.ObjectId, ref: 'Category', es_schema: Category, es_indexed:true, es_select: 'name'},
  name: String,
  price: Number,
  image: String
});

ProductSchema.plugin(mongoosastic, {
  hosts: [
    'localhost:9200'
  ],
  populate: [
    {path: 'category', select: 'name'}
  ]
});

module.exports = mongoose.model('Product', ProductSchema);


var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var CategorySchema = new Schema({
  name: { type: String, unique: true, lowercase: true}
});

module.exports = mongoose.model('Category', CategorySchema);

api.js

router.post('/search', function(req, res, next) {
  console.log(req.body.search_term);
  Product.search({
    query_string: { query: req.body.search_term }
  }, function(err, results) {
    if (err) return next(err);
    res.json(results);
  });
});

我应该怎么做才能填充 mongoosastic 中的某个类别？

Answer 1

您正在使用

populate: [
  {path: 'categories', select: 'name'}
]

但是代码中的

categories

是

undefined

。

您必须使用 类别代替

categories

，因为您已经 在模式声明中提到了键作为类别

希望能解决您的问题。

Answer 2

var ProductSchema = new Schema({
category: { type: Schema.Types.ObjectId, ref: 'Category', es_schema:
Category, es_indexed: true },
name: String,
price: Number,
image: String
});

ProductSchema.plugin(mongoosastic, {
hosts: ['localhost:9200'],
populate: [
{ path: 'category', select: 'name' }
]
});

Answer 3

编辑：

category: { type: Schema.Types.ObjectId, ref: 'Category', es_schema: Category, es_indexed:true, es_select: 'name'},

=>

_category : { type: Schema.Types.ObjectId, ref: 'Category' },

并使用填充：

.populate('_category ', 'name')

希望对您有帮助。

查看更多：http://mongoosejs.com/docs/populate.html