Question

我的架构如下

var DeptSchema   = new Schema({
    name : {type : String, default: ''},
    sku : {type : String, default: ''}, // (SKU = stock keeping unit)
    Product : {
    name : {type : String, default: '', unique:true},
    sku : {type : String, default: '', unique:true}, // (SKU = stock keeping unit)
    description : {type : String, default: '100gm'},
    price : {type : String, default: ''},
    quantity : {type : Number, default: '0'},
    isFav : {type : Boolean, default: 'false'}
    }
});

通过Mongoose我创建了一个API，但是当我想将产品添加到特定的部门（部门）时，问题开始了，创建了一个全新的部门实例，而不是将新产品附加到现有的部门。<登记/> 我的POST / PUT如下所述

.put(function(req, res) {
    // use our Dept model to find the Dept we want
    Dept.findById(req.params.Dept_id, function(err, Dept) {
        if (err)
            res.send(err);

        Dept.name = req.body.name;  // update the Dept info
        Dept.sku = req.body.sku;
        Dept.Product.name = req.body.ProductName;
        Dept.Product.sku = req.body.ProductSKU;
        Dept.Product.description = req.body.ProductDescription;
        Dept.Product.price = req.body.ProductPrice;
        Dept.Product.quantity = req.body.ProductQuantity;
        Dept.Product.isFav = req.body.ProductisFav;            
        // save the Dept
        Dept.save(function(err) {
            if (err)
                res.send(err);

            res.json({ message: 'Department updated!' });
        });
    });
})
.post(function(req, res) {

        var dept = new Dept();      // create a new instance of the Dept model
        dept.name = req.body.name;  // set the Dept name (comes from the request)
        dept.sku = req.body.sku;
        dept.Product.name = req.body.ProductName;
        dept.Product.sku = req.body.ProductSKU;
        dept.Product.description = req.body.ProductDescription;
        dept.Product.price = req.body.ProductPrice;
        dept.Product.quality = req.body.ProductQuality;
        dept.Product.isFav = req.body.ProductisFav;
        // save the Dept and check for errors
        dept.save(function(err) {
            if (err)
                res.send(err);

            res.json({ message: 'Department created!' });
        });        
    })

e.g。我们可以很容易地从输出中看到，不同水果而不是追加到同一个水果部门正在创建另一个实例。另外，为什么ProductSchema没有自动生成的Object Id？

[
{
"__v": 0,
"_id": "5528027cd4eb13d80cf81f87",
"Product": 
{
"isFav": true,
"quantity": 34,
"price": "128",
"description": "1kg",
"sku": "APL",
"name": "Apple"
},
"sku": "FRT",
"name": "Fruits"
},
{
"_id": "552824abd67bf9d81391ad92",
"__v": 0,
"Product": 
{
"isFav": true,
"quantity": 0,
"price": "40",
"description": "1kg",
"sku": "ORG",
"name": "Orange"
},
"sku": "FRT",
"name": "Fruits"
}
]

感谢您的耐心等待。

Answer 1

您已声明Product为对象而非数组。

Product: {...} - ＆gt; Product: [{...}]

此外，您需要更新put方法以将新项目推送到Dept.Product数组而不是更新Dept的属性。您可以阅读如何在documentation中正确使用subdoc。

添加/添加对象而不在Mongoose中创建新的父项

1 个答案: