Express-Validator 检查子文档数组答案

【问题标题】：Express-Validator Check array of SubdocumentsExpress-Validator 检查子文档数组
【发布时间】：2017-09-25 19:02:18
【问题描述】：

这是我的架构：

const InvoiceSchema = new Schema({
name: { type: String, required: true },
description: { type: String },

items: [{
    name: { type: String, required: true },
    rate: { type: Number, required: true },
    quantity: { type: Number, required:true, default: 1 },
    amount: { type: Number }
}]});

我想知道如何使用 Express-validator 来检查 items 元素？

【问题讨论】：

标签： node.js validation express mongoose mongoose-schema

【解决方案1】：

之前也遇到过同样的问题，而且非常痛苦，尤其是当它需要验证一个深度数组或对象数组时。我最终创建了自己的验证器 (wallter) 来处理这个问题。而且这个工具可以直接从你的猫鼬模型生成验证模式。

所以你上面的架构会生成一个验证架构：

{
  "name": {
    "required": {
      "msg": "Value for field 'name' is required"
    }
  },
  "description": {
    "optional": true
  },
  "items.*.name": {
    "required": {
      "msg": "Value for field 'items.*.name' is required"
    }
  },
  "items.*.rate": {
    "required": {
      "msg": "Value for field 'items.*.rate' is required"
    },
    "isDecimal": {
      "msg": "Expecting 'decimal' value for field 'items.*.rate'"
    }
  },
  "items.*.quantity": {
    "required": {
      "msg": "Value for field 'items.*.quantity' is required"
    },
    "isDecimal": {
      "msg": "Expecting 'decimal' value for field 'items.*.quantity'"
    }
  },
  "items.*.amount": {
    "optional": true,
    "isDecimal": {
      "msg": "Expecting 'decimal' value for field 'items.*.amount'"
    }
  }
}

这个验证模式可以提供给验证器

const halter = require('wallter').halter
const Builder = require('wallter').builder // validation schema builder

const builder = new Builder({
  model: mongoose.model('YourModelName')
})

server.use(halter())

server.post('/test', function (req, res, next) {
    let validationSchema = builder.build() // see above generated validation schema output

    req.halt(validationSchema).then(result => {
        if (result.length) {
            res.send(400, result)
        } else {
            res.send(200)
        }

        return next()
    })
})

【讨论】：