在猫鼬中填充数组

Question

如何填充数组 "ascents" 请帮助我。

{"_id":"5d92775ab93e250910838d98",
"seminars":["5d854deecfed0e2494b03e38","5d85533e56fa1c24588824ff"],
"ascents":[
{"_id":"5d8bd237f55e4326a4faf7d0","dateAscent":"2019-09-20T00:00:00.000Z"},
{"_id":"5d8bd250f55e4326a4faf7d1","dateAscent":"2019-09-20T00:00:00.000Z"},
{"_id":"5d8bd258f55e4326a4faf7d2","dateAscent":"2019-09-20T00:00:00.000Z"},
{"_id":"5d8bd26af55e4326a4faf7d3","dateAscent":"2019-0920T00:00:00.000Z"}
],
"status":true,
"user":"5d84f154d275fd125835b4ec","__v":17
}

我的模型：

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


var profileSchema = new Schema({
    user: { type: Schema.Types.ObjectId, ref: 'User', required: true },
    seminars: [{ type: Schema.Types.ObjectId, ref: 'Seminar', required: false }],
    ascents: [{ascent:{ type: Schema.Types.ObjectId, ref: 'Ascent', required: false },dateAscent:{ type: Date, required: true, default: Date.now }}],
    status: { type: Boolean, default: true }
});


module.exports = mongoose.model('Profile', profileSchema);

谁能帮帮我，我该怎么做？

Answer 1

考虑分开定义 Ascent 模式，以便它有自己的模型

const ascentSchema = new Schema({
    dateAscent:{ 
        type: Date, 
        required: true, 
        default: Date.now 
     }
})

module.exports = mongoose.model('Ascent',ascentSchema  )

那么您的个人资料架构将如下所示：

var profileSchema = new Schema({
    user: { type: Schema.Types.ObjectId, ref: 'User', required: true },
    seminars: [{ type: Schema.Types.ObjectId, ref: 'Seminar', required: false }],
    ascents: [{type: Schema.Types.ObjectId, ref: 'Ascent'}],
    status: { type: Boolean, default: true }
});

module.exports = mongoose.model('Profile', profileSchema);

到 populate ascents 您必须确保将有效的 _ids 添加到 ascents 数组当您添加到新的 Ascents 文档时。

编写查询时，为了用相关文档填充 ascents 数组你会这样做：

Profile.find().
  populate({
    path: 'ascents',
    match: { }, //you can even filter the documents in the array using this match option
    // Explicitly exclude `_id`
    select: '-_id',
    options: { limit: 5 } //Also limit the amount of documents returned
  }).
  exec();

让我知道这种方法是否有效。请记住，当您添加新的 Ascent 文档时，您必须将 _ids 推入与 relatProfile 文档分开的 ascents 数组。请参阅文档 example

在猫鼬中填充数组

Populate array in mongoose

mongoose

mongoose-populate

mongoose-schema