子文档的Express-Validator校验数组

Question

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检查items元素？

Answer 1

以前也有过同样的问题，特别是如果要验证的是一个深度数组或对象数组，就会非常痛苦。我最终创建了自己的验证器(wallter)来处理这个问题。此外，该工具还可以直接从您的mongoose模型生成验证模式。

所以上面的模式将生成一个验证模式：

{
  "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'"
    }
  }
}

可以将此验证模式提供给验证器

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()
    })
})