问题描述
我有一个这样的收集模式:
const PrescriptionSchema = new Schema({
patientId:{type: mongoose.Schema.ObjectId,ref: 'User'},prescriptionName: String,prescriptionNote: String,prescriptionDate: Date,diseaseId: {type: mongoose.Schema.ObjectId,ref: 'Diseases'},drugs: [{
drugcateId:{type: mongoose.Schema.ObjectId,ref: 'DrugCategory'},quantity: Number,howtouse: String
}],is_deleted: {type: Boolean,default: false},createdBy: {type: mongoose.Schema.ObjectId,ref: 'User'}
},{
timestamps: true,collection: 'prescriptions'
}
);
export default mongoose.model('prescriptions',PrescriptionSchema );
请注意,在此集合中,我有一系列“药物”,这是我从“ DrugCategory”中获得的一系列药物,在每种药物中我都有数量和使用方法..以便将其分组(drugCateId,数量(如何使用)在药品数组中。 找到处方时,我想在Drugs数组中填充drugCateId。我该怎么做? 下面是我当前的代码:
async findOne(req,res){
const { id } = req.params;
await Prescriptions.
findOne({ is_deleted: false,_id: id}).
.populate(
{
path: 'drugs',populate: {
path: 'drugCateId',model: 'DrugCategory'
}
}).
exec(function (err,data) {
if (err) return handleError(err);
res.send(data)
});
}
但这是行不通的。 以下是我的结果:
{
"is_deleted": false,"_id": "5f32768a06693a520806717d","patientId": "5c80930d447df7735138693e","prescriptionName": "Prescription for you","prescriptionNote": "Please drink follow doctor","prescriptionDate": "2020-07-08T00:00:00.000Z","diseaseId": "5f22a6d600980c081ca9e14f","drugs": [
{
"_id": "5f32768a06693a5208067181","drugcateId": "5f23deca04e3150a48632229",// How can I populate this one?
"quantity": 10,"howtouse": "drink 2 times after meal everyday"
},{
"_id": "5f32768a06693a5208067180","drugcateId": "5f23deca04e3150a48632233",{
"_id": "5f32768a06693a520806717f","drugcateId": "5f23deca04e3150a48632234",{
"_id": "5f32768a06693a520806717e","drugcateId": "5f23deca04e3150a4863224a","howtouse": "drink 2 times after meal everyday"
}
],"createdBy": "5d1cd947231ceb95b8838c1b","createdAt": "2020-08-11T10:44:26.842Z","updatedAt": "2020-08-11T10:44:26.842Z","__v": 0
}
希望您能理解我的问题,请看一看。谢谢你
解决方法
您似乎很亲近,但请确保提供正确的路径:
.populate({
path: 'drugcateId',model: 'DrugCategory'
})
将drugCateId
更改为drugcateId
。
此外,您应该可以直接填充DrugCategory
。
您当前的版本与您的架构不匹配。建议您同时填充drugs
和drugs.drugcateId
。但是这里drugs
是直接嵌入的,不能引用另一个集合中的文档,因此不可能populate()
:
.populate({
path: 'drugs',// this assumes drugs are objectIds: [{ type: ObjectId,ref: 'Drug' }]
populate: {
path: 'drugCateId',model: 'DrugCategory'
}
})
相反,您应该能够对数组使用点符号:
.populate({ path: "drugs.drugcateId" })
或简称
.populate("drugs.drugcateId")
,
感谢您的回复。我有一个错误,我的模型是“ drugcate”,但在我的填充命令中是“ drugCate”。我已经将模型更改为“ drugCate”,并且可以进行以下查询。
populate({ path: 'drugs.drugCateId',populate: {path: 'drugs.drugCateId'}
})
谢谢