猫鼬填充subdoc的

Question

我有一个orderSchema具有subdoc productOrder：

const paymentTrans = require('./PaymentTrans').schema; 
const productOrder = require('./ProductOrder').schema; 

const orderSchema = new mongoose.Schema({ 
    orderId: { type: mongoose.Schema.Types.ObjectId }, 
    userId : {type: mongoose.Schema.Types.ObjectId, ref: 'User'}, 
    productOrder: [productOrder], 
    totalPerOrder: {type: Number, default:''}, 
    paymentTrans: [paymentTrans] 
}, { timestamps: true }); 

const Order = mongoose.model('Order', orderSchema); 

module.exports = Order; 

porductOrder模式

const productOrderSchema = new mongoose.Schema({ 
    sku: { type: String, default: '' }, 
    name: { type: String, default: '' }, 
    quantity: { type: Number, default: '' }, 
    price: { type: Number, default: '' }, 
    total: { type: Number, default: '' } 
}); 

const ProductOrder = mongoose.model('ProductOrder', productOrderSchema); 

module.exports = ProductOrder; 

我希望得到orderproductOrder（orderSchema）：

尝试这些

Order.findById(req.body.id) 
     .exec(function (err, products) { 
      var opts = { 
       path: 'productOrder', 
       model: 'ProductOrder' 
      }; 

      Order.populate(products, opts, function (ree, products) { 
       console.log(JSON.stringify(products)); 
      }); 

      res.render('store/cart', { 
       title: 'MyCart', 
       angularApp: 'storeApp', 
       products: products 
      }); 
     }); 

哪里req.body.id为orderId和console的object看起来像这样：（抱歉，WebStorm没有复制/从控制台粘贴）

另一种方法我试过

Order.findById(req.body.id, function (err, products) { 
     var opts = [ 
      { path: 'productOrder', model: 'ProductOrder' } 
     ] 

     Order.populate(products, opts, function (err, products) { 
      console.log(products); 
     }) 
    }) 

而另一个

Order.find({ _id: req.body.id, userId: req.user._id }) 
     .populate({ 
      path: 'productOrder', 
      populate: { 
       path: 'productOrder', 
       model: 'ProductOrder' 
      } 

     }) 
     .exec(function (err, productOrder) { 
      //products.forEach(function(elem){ 
       console.log("products = " + JSON.stringify(productOrder)); 
      //}); 

      console.log("REQ._ID " + req.body.id); 
      res.render('store/cart', { 
       title: 'MyCart', 
       angularApp: 'storeApp', 
       products: productOrder 
      }); 
     }); 

他们都最终给我订单的整个doc。 我怎样才能得到订单的产品？ （productOrder） 感谢名单

Answer 1

您可以使用select功能，然后填充如下

Order.findOne({ _id: req.body.id}) 
    .select('-_id productOrder') 
    .populate('productOrder') 
    .exec(function (err, orderObj) { 
     if(!err) { 
     var productOrder = orderObj.productOrder; 
     //products.forEach(function(elem){ 
      console.log("products = " + JSON.stringify(productOrder)); 
     //}); 

     console.log("REQ._ID " + req.body.id); 
     res.render('store/cart', { 
      title: 'MyCart', 
      angularApp: 'storeApp', 
      products: productOrder 
     }); 
     } 
    });