我有三个模型:用户
、物业
和 推荐
。
推荐
模型包含 物业 ID
、留言
和 用户 ID
。我可以通过管道获取每个物业的所有推荐。
Property.aggregate([
{ $match: { _id: ObjectId(propertyId) } },
{
$lookup: {
from: 'propertytestimonials',
let: { propPropertyId: '$_id' },
pipeline: [
{
$match: {
$expr: {
$and: [{ $eq: ['$propertyId', '$$propPropertyId'] }],
},
},
},
],
as: 'testimonials',
},
},
])
返回的属性看起来像这样
{
.... other property info,
testimonials: [
{
_id: '6124bbd2f8eacfa2ca662f35',
userId: '6124bbd2f8eacfa2ca662f29',
message: 'Amazing property',
propertyId: '6124bbd2f8eacfa2ca662f2f',
},
{
_id: '6124bbd2f8eacfa2ca662f35',
userId: '6124bbd2f8eacfa2ca662f34',
message: 'Worth the price',
propertyId: '6124bbd2f8eacfa2ca662f2f',
},
]
}
用户模式
firstName: {
type: String,
required: true,
},
lastName: {
type: String,
required: true,
},
email: {
type: String,
required: true,
},
属性模式
name: {
type: String,
required: true,
},
price: {
type: Number,
required: true,
},
location: {
type: String,
required: true,
},
推荐信架构
propertyId: {
type: ObjectId,
required: true,
},
userId: {
type: ObjectId,
required: true,
},
testimonial: {
type: String,
required: true,
},
现在的问题是如何从每个推荐中进行$lookup,以展示用户信息而非仅有id?
我希望我的响应结构如下:
{
_id: '6124bbd2f8eacfa2ca662f34',
name: 'Maisonette',
price: 100000,
testimonials: [
{
_id: '6124bbd2f8eacfa2ca662f35',
userId: '6124bbd2f8eacfa2ca662f29',
testimonial: 'Amazing property',
propertyId: '6124bbd2f8eacfa2ca662f34',
user: {
_id: '6124bbd2f8eacfa2ca662f29',
firstName: 'John',
lastName: 'Doe',
email: 'jd@mail.com',
}
},
{
_id: '6124bbd2f8eacfa2ca662f35',
userId: '6124bbd2f8eacfa2ca662f27',
testimonial: 'Worth the price',
propertyId: '6124bbd2f8eacfa2ca662f34',
user: {
_id: '6124bbd2f8eacfa2ca662f27',
firstName: 'Sam',
lastName: 'Ben',
email: 'sb@mail.com',
}
}
]
}