如何創建一個Mongoose方法將圖像寫入cloudinary

Question

因此，我有MEAN堆棧應用程序（汽車銷售），需要我允許用戶上傳多個圖像到MongoDB後端。我選擇將圖像上傳到Cloudinary，然後在成功上傳時，使用Cloudinary返回的圖像URL創建一個新文檔。

我對NodeJS/Mongoose相當陌生，所以我不確定我是如何實現我想要做的。以下是我迄今爲止：

var mongoose = require('mongoose'); 
var cloudinary = require('cloudinary'); 

var AdSchema = new mongoose.Schema({ 
    sellerEmail: String, 
    createdAt: { type: Date, default: Date.now }, 
    expiresAt: { type: Date, default: new Date(+ new Date() + 28 * 24 * 60 *  60 * 1000) }, 
    adTitle: String, 
    price: Number, 
    currency: String, 
    phoneNo: String, 
    county: String, 
    make: String, 
    model: String, 
    year: Number, 
    engineSize: Number, 
    fuelType: String, 
    bodyType: String, 
    otherMake: String, 
    otherModel: String, 
    transmission: String, 
    miles: Number, 
    milesKm: String, 
    taxExpiry: String, 
    testExpiry: String, 
    sellerType: String, 
    description: String, 
    imageUrls: Array, 
    mainImage: Number 
}); 

AdSchema.methods.uploadImages = function (images) { 
var ad = this.toObject(); 
if (images.length) { 
    images.forEach(function (image) { 
     cloudinary.uploader.upload(image.path).then(function (result) { 
      ad.imageUrls.push(result.secure_url); 
      //the images are uploaded to cloudinary as expected and the urls are pushed to imageUrls, but what do I do now? 
      // not sure what to return when images have been uploaded 
     }); 
    }); 
} else { 
    cloudinary.uploader.upload(images.path).then(function (result) { 
     ad.imageUrls.push(result.secure_url); 
     // not sure what to return when image has been uploaded 
    }); 
    } 
} 

module.exports = mongoose.model('Ad', AdSchema); 

server.js（片段）

//I want to call method above and on success, save the ad 
ad.uploadImages(req.files.images, function() { 

    ad.save(function(err, savedAd) { 
     //I am fine with this part 
    }); 
}); 

Answer 1

所以我想通了自己：

我添加回調方法：

AdSchema.methods.uploadImages = function (images, callback) 

然後成功上傳我回復了回調：

return callback(null, ad); 

然後把它稱爲是這樣的：

ad.uploadImages(req.files.images, function(err, callback) { 
    if(err) { 
     return res.status(400).send({ 
      message: 'there was an error creating your ad. Your card has not been charged' 
     }); 
    } 
    //save ad 
});