如何在子集合中创建虚拟对象-Mogoose

Question

在猫鼬中，我有一个带有图像（名称+扩展名）的对象（'目标'）。每个对象（“目标”）。具有其他对象的子集合，该子集合再次包含图像（名称+扩展名）。

现在，我已经能够为target.image创建虚拟图像。所以我得到了一个完整的位置URL。但是我无法为target.upload.image创建虚拟。

我该怎么做？

const targetSchema = mongoose.Schema({
    title: {
        type: String, required: true
    },
    userId: {
        type: String, required: true
    },
    ........
    image: {
        type: String, required: true
    },
    uploads: [{
        upload_image: {
            type: String, required: true
        },
        upload_userId: {
            type: String, required: true
        },
    }],
});

这是我的目标图片的虚拟图片

targetSchema.virtual('targetImgURL').get(function(){
    let url = process.env.URL + ":" + process.env.PORT + "/public/images/targets/uploads/" + this.image
    return url
});

Answer 1

是，我已经找到了解决方案。不幸的是，不可能一次扣留所有东西。但是这种方式并不麻烦。请参阅下面的代码以获取解决方案。

const uploadSchema = mongoose.Schema({
    upload_image: {
        type: String, required: true
    },
    upload_userId: {
        type: String, required: true
    },
});

// Virtuals
uploadSchema.virtual('UploadImgURL').get(function(){
    let url = process.env.URL + ":" + process.env.PORT + "/public/images/targets/answers/" + this.image
    return url
});

const targetSchema = mongoose.Schema({
    title: {
        type: String, required: [true, 'A title is required']
    },
    ....
    uploads: [ uploadSchema ],
});

// Virtuals
targetSchema.virtual('targetImgURL').get(function(){
    let url = process.env.URL + ":" + process.env.PORT + "/public/images/targets/uploads/" + this.image
    return url
});