Mongoosejs 虚拟填充 [英] Mongoosejs virtual populate
本文介绍了Mongoosejs 虚拟填充的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我的项目中有一个圆形模型:
I have a circle model in my project:
var circleSchema = new Schema({
//circleId: {type: String, unique: true, required: true},
patientID: {type: Schema.Types.ObjectId, ref: "patient"},
circleName: String,
caregivers: [{type: Schema.Types.ObjectId}],
accessLevel: Schema.Types.Mixed
});
circleSchema.virtual('caregiver_details',{
ref: 'caregiver',
localField: 'caregivers',
foreignField: 'userId'
});
照顾者模式:
var cargiverSchema = new Schema({
userId: {type: Schema.ObjectId, unique: true}, //objectId of user document
detailId: {type: Schema.ObjectId, ref: "contactDetails"},
facialId: {type: Schema.ObjectId, ref: "facialLibrary"}, //single image will be enough when using AWS rekognition
circleId: [{type: Schema.Types.ObjectId, ref: "circle"}], //multiple circles can be present array of object id
});
示例对象:
{
"_id" : ObjectId("58cf4832a96e0e3d9cec6918"),
"patientID" : ObjectId("58fea8ce91f54540c4afa3b4"),
"circleName" : "circle1",
"caregivers" : [
ObjectId("58fea81791f54540c4afa3b3"),
ObjectId("58fea7ca91f54540c4afa3b2")
],
"accessLevel" : {
"location"" : true,
"notes" : false,
"vitals" : true
}
}
我已经为 mongoosejs 尝试过虚拟填充,但我无法让它工作.这似乎是完全相同的问题:https://github.com/Automattic/mongoose/issues/4585
I have tried virtual populate for mongoosejs but I am unable to get it to work. This seems to be the exact same problem: https://github.com/Automattic/mongoose/issues/4585
circle.find({"patientID": req.user._id}).populate('caregivers').exec(function(err, items){
if(err){console.log(err); return next(err) }
res.json(200,items);
});
我只在结果中获取对象 ID.它没有被填充.
I am only getting the object id's in the result. It is not getting populated.
推荐答案
找出问题所在.默认情况下,虚拟字段不包含在输出中.在圆形架构中添加此后:
Figured out what the problem was. By default, the virtual fields are not included in the output. After adding this in circle schema:
circleSchema.virtual('caregiver_details',{
ref: 'caregiver',
localField: 'caregivers',
foreignField: 'userId'
});
circleSchema.set('toObject', { virtuals: true });
circleSchema.set('toJSON', { virtuals: true });
现在可以完美运行了.
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