从对象数组上传图像（Multer）

Question

我一直在努力研究如何抓取如下所示的对象数组中的图像：

import mongoose from "mongoose";

const prodcutSchema = new mongoose.Schema(
  {
    title: {
      type: String,
      required: true,
      trim: true,
      lowercase: true,
      unique: true,
    },
    details: [String],
    fits: [String],
    compositions: [String],
    sold: {
      type: Number,
      default: 0,
    },
    colors: [
      {
        coverImage: {
          type: String,
          required: true,
        },
        hoverImage: String,
        images: [String],
        colorName: {
          type: String,
          required: true,
          trim: true,
          lowercase: true,
        },
        colorQuantity: {
          type: Number,
          required: true,
          trim: true,
        },
        discount: {
          type: Number,
          default: 0,
          max: 80,
        },
        sizes: [
          {
            sizeName: {
              type: String,
              required: true,
              trim: true,
              lowercase: true,
            },
            sizeQuantity: {
              type: Number,
              required: true,
              trim: true,
            },
          },
        ],
      },
    ],
    price: {
      type: Number,
      required: true,
      trim: true,
    },
    totalQuantity: {
      type: Number,
      required: true,
      trim: true,
    },
    category: {
      type: mongoose.Schema.ObjectId,
      ref: "Category",
      required: true,
    },
    subcategory: {
      type: mongoose.Schema.ObjectId,
      ref: "Subcategory",
      required: true,
    },
    series: {
      type: mongoose.Schema.ObjectId,
      ref: "Series",
      required: true,
    },
  },
  { timestamps: true }
);

这是对象的模式，我不知道如何在路由器中添加图像的路径，我有这样的：

router.post("/", upload.fields([
  {
    name: "coverImage",
    maxCount: 1,
  },
  {
    name: "hoverImage",
    maxCount: 1,
  },
  {
    name: "images",
    maxCount: 3,
  },
]), createProdcutValidation, createProduct);

并且总是向我抛出“MulterError：意外字段”，这就是我用邮递员发送它的方式： 那么问题出在哪里呢？

“MulterError：意外字段”我总是收到此错误！

Answer 1

由于文件位于对象数组中，

.fields()

无法检测字段，因此会出现该错误。

您可以使用

.any()

来处理所有文件，然后您可以循环

req.files

并读取

fieldname

属性来确定它是哪种类型的文件，添加计数器来替换

maxCount

，验证等

例如：

router.post("/", upload.any(), createProdcutValidation, createProduct);

处理和验证：

req.files.forEach(file => {
  // handle/validate
  console.log(file.fieldname); // e.g. 'colors[0][coverImage]'
});