Question

当我要将产品添加到数据库（MongoDB）时。该程序处于循环模式，不会崩溃，但是会在控制台中显示错误。

控制台内容包含在底部

models / single-product.js

// models/single-product.js

const mongoose = require('mongoose')

const Schema = mongoose.Schema

const productSchema = new Schema({
    title: {
        type: String,
        required: true
    },
    description: {
        type: String,
        required: true
    },
    price: {
        type: Number,
        required: true
    },
    userId: {
        type: Schema.Types.ObjectId,
        ref: 'User',
        required: true
    }
})

module.exports = mongoose.model('Product', productSchema)

models / user.js

// models/user.js

const mongoose = require('mongoose')

const Schema = mongoose.Schema

const userSchema = new Schema({
    username: {
        type: String ,
        required: true
    },
    email: {
        type: String ,
        required: true
    },
    cart: {
        items:[
            {
               productId: {
                  type: Schema.Types.ObjectId,
                  ref: 'Product',
                  required: true
               }, 
               qty:{
                type: Number ,
                required: true
               }
            }
        ]
    }
})
module.exports =mongoose.model('User', userSchema)

controllers / admin.js

// constrollers/admin.js

const Product = require('../models/single-product')

module.exports.addProductsPage = (req,res)=> {
    res.render('admin/add-product',{
        pageTitle: "Add Product-Page"
    })
}

module.exports.sendProducts = (req,res)=>{
    const title = req.body.title
    const description = req.body.description
    const price = req.body.price
    const products = new Product({
        title: title,
        description: description ,
        price: price,
        userId: req.user
    })
    products.save()
    .then(result =>{
        console.log('Product Created!')
        res.redirect('/admin/add-product')
    })
    .catch(err =>{
        console.log(err)
    })
    
}
module.exports.getProducts = (req,res)=>{
    Product.find()
        .then(products =>{
            res.render('admin/products',{
                productsArray : products,
                pageTitle : 'Admin Products'
            })
        })
        .catch(err =>{
            console.log(err)
        })
}
module.exports.deleteProduct = (req,res)=>{
    const pId = req.body.productId
    Product.findByIdAndRemove(pId)
    .then(()=>{
        console.log('Product Deleted!')
        res.redirect('products')
    })
    .catch(err =>{
        console.log(err)
    })
}

Error [ValidationError]: Product validation failed: userId: Path `userId` is required.
at ValidationError.inspect (D:\Alireza\web\Test project's\OnlineShop-Node.js\node_modules\mongoose\lib\error\validation.js:59:24)
at formatValue (internal/util/inspect.js:550:31)
at inspect (internal/util/inspect.js:221:10)
at formatWithOptions (internal/util/inspect.js:1651:40)
at Object.Console.<computed> (internal/console/constructor.js:272:10)
at Object.log (internal/console/constructor.js:282:61)
at D:\Alireza\web\Test project's\OnlineShop-Node.js\controllers\admin.js:25:17
at processTicksAndRejections (internal/process/task_queues.js:85:5) {

错误：{ userId：MongooseError [ValidatorError]：路径userId是必需的。在新的ValidatorError（D：\ Alireza \ web \ Test项目的\ OnlineShop-Node.js \ node_modules \ mongoose \ lib \ error \ validator.js：29：11）在验证时（D：\ Alireza \ web \ Test项目的\ OnlineShop-Node.js \ node_modules \ mongoose \ lib \ schematype.js：1034：13）在D：\ Alireza \ web \ Test项目的\ OnlineShop-Node.js \ node_modules \猫鼬\ lib \ schematype.js：1088：11 在Array.forEach（）在ObjectId.SchemaType.doValidate（D：\ Alireza \ web \ Test项目的\ OnlineShop-Node.js \ node_modules \ mongoose \ lib \ schematype.js：1043：14）在D：\ Alireza \ web \ Test项目的\ OnlineShop-Node.js \ node_modules \ mongoose \ lib \ document.js：2134：9 在processTicksAndRejections（internal / process / task_queues.js：75：11）{ 消息：“路径userId是必需的。”，名称：“ ValidatorError”，属性：[对象]，种类：“必填”，路径：“ userId”，值：未定义，原因：未定义， [Symbol（mongoose：validatorError）]：正确 } }， _message：“产品验证失败”，名称：“ ValidationError” }

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Answer 1

请在controllers / admin.js中检查此代码部分。

const products = new Product({
        title: title,
        description: description ,
        price: price,
        userId: req.user
    })

您要插入具有未定义或null值的userId。我认为req.user是未定义的，并且您在模型中定义具有必需的真实约束的userId列的模式：

userId: {
        type: Schema.Types.ObjectId,
        ref: 'User',
        required: true
    }

请在插入数据之前检查此日志

console.log(req.user);

Answer 2

首先检查req.user是否为空，然后使用

保存产品

const products = new Product({
        title: title,
        description: description ,
        price: price,
        userId: mongoose.Types.ObjectId(req.user);
    })

您需要将userId设为objectID

猫鼬/ nodejs中的ValidationError

2 个答案: