UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'public_id' of undefined

Question

嗨，我在这里遇到了问题，该功能运行良好，我所做的验证并没有给我一个错误提示“TypeError: Cannot read 属性 'path' of undefined”，但现在我稍后有问题，在函数的最后 return 部分，如果我只在 1-5 之间上传，我如何解决获取和“类型错误：无法读取未定义的 属性 'public_id'”图片？如果我上传 6 张图片，它会完美运行，如果我上传 2 张，它会上传 tu cloudinary，但它给出了我之前在该部分代码中所说的错误。请谢谢

create: async (req, res) => {


        var pinturaId = req.params.id;

        var imageloop=[];

        if(req.files.file0!=undefined){
            imageloop.push(req.files.file0);
        }
        if(req.files.file1!=undefined){
            imageloop.push(req.files.file1);
        }
        if(req.files.file2!=undefined){
            imageloop.push(req.files.file2);
        }
        if(req.files.file3!=undefined){
            imageloop.push(req.files.file3);
        }
        if(req.files.file4!=undefined){
            imageloop.push(req.files.file4);
        }
        if(req.files.file5!=undefined){
            imageloop.push(req.files.file5);
        }

        var array = [];
        

        for (let i = 0; i < imageloop.length; i++) {

            await cloudinary.uploader.upload(imageloop[i].path, (err, result) => {

             array.push(result)
               

            });
        }

        if (pinturaId) {

            Pintura.findOneAndUpdate({ _id: pinturaId }, { new: true }, (err, paintUpdated) => {

                if (err || !paintUpdated) {
                    return res.status(200).send({
                        status: "Error",
                        message: "Error al guardar la imagen"
                    });
                }

                if (paintUpdated != null) {

                }

                return res.status(200).send({
                    status: "Success",
                    paints: paintUpdated
                });
            });
        } else {
            return res.status(200).send({
                status: "Success",
                image: array[0].public_id + "." + array[0].format,
                imageurl: array[0].secure_url,
                image2: array[1].public_id + "." + array[1].format,
                image2url: array[1].secure_url,
                image3: array[2].public_id + "." + array[2].format,
                image3url: array[2].secure_url,
                image4: array[3].public_id + "." + array[3].format,
                image4url: array[3].secure_url,
                image5: array[4].public_id + "." + array[4].format,
                image5url: array[4].secure_url,
                image6: array[5].public_id + "." + array[5].format,
                image6url: array[5].secure_url
            });
        }
    }

}

Answer 1

我相信这对你有用，我还看到你忘记在 .findOneAndUpdate

之前添加一个 await

无需对键进行硬编码，您只需遍历对象，然后在最后动态构建响应

create: async (req, res) => {


        var pinturaId = req.params.id;

        var imageloop=[];

        if (req.files) {
          // loops over req.files
          Object.keys(req.files).map(key => {
            // check if the key name includes the substring "file"
            if (req.files[key] !== undefined && key.includes('file')) {
              imageloop.push(req.files[key]);
            }
          });
        }

        var array = [];
        

        for (let i = 0; i < imageloop.length; i++) {
          await cloudinary.uploader.upload(imageloop[i].path, (err, result) => {
            array.push(result)
          });
        }

        if (pinturaId) {
          // you forgot the "await" here
            await Pintura.findOneAndUpdate({ _id: pinturaId }, { new: true }, (err, paintUpdated) => {

                if (err || !paintUpdated) {
                    return res.status(200).send({
                        status: "Error",
                        message: "Error al guardar la imagen"
                    });
                }

                if (paintUpdated != null) {

                }

                return res.status(200).send({
                    status: "Success",
                    paints: paintUpdated
                });
            });
        } else {
            const obj = {
              status: 'Success',
            }
            array.map((_n, index) => {
              obj[`image${index}`] = `${array[index].public_id}.${array[index].format}`
              obj[`image${index}url`] = array[index].secure_url
            })
            return res.status(200).send(obj);
        }
    }
}