Javascript Nodejs-Express-Mongoose：使用save方法处理请求问题

节点在我发出PUT请求时显示此错误：

TypeError:product.save不是函数

（参考controllers/product.js中的

保存

功能）

我发现这是更新文档的正确表单，但我有这个问题

我正在分享部分代码：

app.js

var api = express.Router();

api.route('/products') 
 .get(ProductCtrl.findAll)
 .post(ProductCtrl.add);

api.route('/products/:isbn')
 .get(ProductCtrl.findByISBN)
 .delete(ProductCtrl.delete)
 .put(ProductCtrl.update);

app.use('/api', api);

var mongoose = require('mongoose');
var Schema = mongoose.schema;

var productSchema = mongoose.Schema({
  isbn: {type: String},
  title: {type: String},
  author: {type: String},
  template: {type: String},
  active: {type: Number} //1 - Active, 0 - Inactive
});

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

//PUT - Update the product by ISBN
exports.update = function(req, res){

Product.find(req.params.isbn, function(err, product){
    if(!product) res.status(404).send({message: 'Product not exits'});
    console.log("PUT - /products/" + req.params.isbn);
    product.isbn = req.body.isbn;
    product.title = req.body.title;
    product.author = req.body.author;
    product.active = req.body.active;
    product.template = req.body.template;

    product.save(function(err){
        if(err) return res.send(500,err.message);
        console.log("Successfully updated: " + req.body.isbn);
        res.status(200).json(product);
    });
});
};

models/product.js

var api = express.Router();

api.route('/products') 
 .get(ProductCtrl.findAll)
 .post(ProductCtrl.add);

api.route('/products/:isbn')
 .get(ProductCtrl.findByISBN)
 .delete(ProductCtrl.delete)
 .put(ProductCtrl.update);

app.use('/api', api);

var mongoose = require('mongoose');
var Schema = mongoose.schema;

var productSchema = mongoose.Schema({
  isbn: {type: String},
  title: {type: String},
  author: {type: String},
  template: {type: String},
  active: {type: Number} //1 - Active, 0 - Inactive
});

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

//PUT - Update the product by ISBN
exports.update = function(req, res){

Product.find(req.params.isbn, function(err, product){
    if(!product) res.status(404).send({message: 'Product not exits'});
    console.log("PUT - /products/" + req.params.isbn);
    product.isbn = req.body.isbn;
    product.title = req.body.title;
    product.author = req.body.author;
    product.active = req.body.active;
    product.template = req.body.template;

    product.save(function(err){
        if(err) return res.send(500,err.message);
        console.log("Successfully updated: " + req.body.isbn);
        res.status(200).json(product);
    });
});
};

控制器/product.js

var api = express.Router();

api.route('/products') 
 .get(ProductCtrl.findAll)
 .post(ProductCtrl.add);

api.route('/products/:isbn')
 .get(ProductCtrl.findByISBN)
 .delete(ProductCtrl.delete)
 .put(ProductCtrl.update);

app.use('/api', api);

var mongoose = require('mongoose');
var Schema = mongoose.schema;

var productSchema = mongoose.Schema({
  isbn: {type: String},
  title: {type: String},
  author: {type: String},
  template: {type: String},
  active: {type: Number} //1 - Active, 0 - Inactive
});

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

//PUT - Update the product by ISBN
exports.update = function(req, res){

Product.find(req.params.isbn, function(err, product){
    if(!product) res.status(404).send({message: 'Product not exits'});
    console.log("PUT - /products/" + req.params.isbn);
    product.isbn = req.body.isbn;
    product.title = req.body.title;
    product.author = req.body.author;
    product.active = req.body.active;
    product.template = req.body.template;

    product.save(function(err){
        if(err) return res.send(500,err.message);
        console.log("Successfully updated: " + req.body.isbn);
        res.status(200).json(product);
    });
});
};

---

这是因为

Model.find

返回一个项目数组，而不是一个特定的mongoose对象。因此，请尝试

Model.findOne

或

Model.findById（id，（err，data）={}）

然后您可以调用

save

函数。还有另一种方法，不是两个查询，而是尝试一个查询<代码>Model.findOneAndUpdate（）

---

希望这有帮助。

这是因为

模型。find

返回一个项目数组，而不是特定的mongoose对象。因此，请尝试

Model.findOne

或

Model.findById（id，（err，data）={}）

然后您可以调用

save

函数。还有另一种方法，不是两个查询，而是尝试一个查询<代码>Model.findOneAndUpdate（）

希望这有帮助。

做这个

Product.find(req.params.isbn, function(err, product){
    if(!product) res.status(404).send({message: 'Product not exits'});
    console.log("PUT - /products/" + req.params.isbn);
    product.isbn = req.body.isbn;
    product.title = req.body.title;
    product.author = req.body.author;
    product.active = req.body.active;
    product.template = req.body.template;

   let updateproduct = new Product(product);

    updateproduct.save(function(err){
        if(err) return res.send(500,err.message);
        console.log("Successfully updated: " + req.body.isbn);
        res.status(200).json(product);
    });
});
};

这样做

Product.find(req.params.isbn, function(err, product){
    if(!product) res.status(404).send({message: 'Product not exits'});
    console.log("PUT - /products/" + req.params.isbn);
    product.isbn = req.body.isbn;
    product.title = req.body.title;
    product.author = req.body.author;
    product.active = req.body.active;
    product.template = req.body.template;

   let updateproduct = new Product(product);

    updateproduct.save(function(err){
        if(err) return res.send(500,err.message);
        console.log("Successfully updated: " + req.body.isbn);
        res.status(200).json(product);
    });
});
};

请用这个

exports.update = function(req, res){

    Product.find(req.params.isbn, function(err, product){
        if(!product) res.status(404).send({message: 'Product not exits'});
        console.log("PUT - /products/" + req.params.isbn);
        product.isbn = req.body.isbn;
        product.title = req.body.title;
        product.author = req.body.author;
        product.active = req.body.active;
        product.template = req.body.template;

        Product.save(product,function(err,data){
            if(err) return res.send(500,err.message);
            console.log("Successfully updated: " + req.body.isbn);
            res.status(200).json(product);
        });
    });
    };

而不是

    exports.update = function(req, res){

    Product.find(req.params.isbn, function(err, product){
        if(!product) res.status(404).send({message: 'Product not exits'});
        console.log("PUT - /products/" + req.params.isbn);
        product.isbn = req.body.isbn;
        product.title = req.body.title;
        product.author = req.body.author;
        product.active = req.body.active;
        product.template = req.body.template;

        product.save(function(err){
            if(err) return res.send(500,err.message);
            console.log("Successfully updated: " + req.body.isbn);
            res.status(200).json(product);
        }

);
});
};

这意味着您需要使用产品作为产品

请使用此

exports.update = function(req, res){

    Product.find(req.params.isbn, function(err, product){
        if(!product) res.status(404).send({message: 'Product not exits'});
        console.log("PUT - /products/" + req.params.isbn);
        product.isbn = req.body.isbn;
        product.title = req.body.title;
        product.author = req.body.author;
        product.active = req.body.active;
        product.template = req.body.template;

        Product.save(product,function(err,data){
            if(err) return res.send(500,err.message);
            console.log("Successfully updated: " + req.body.isbn);
            res.status(200).json(product);
        });
    });
    };

而不是

    exports.update = function(req, res){

    Product.find(req.params.isbn, function(err, product){
        if(!product) res.status(404).send({message: 'Product not exits'});
        console.log("PUT - /products/" + req.params.isbn);
        product.isbn = req.body.isbn;
        product.title = req.body.title;
        product.author = req.body.author;
        product.active = req.body.active;
        product.template = req.body.template;

        product.save(function(err){
            if(err) return res.send(500,err.message);
            console.log("Successfully updated: " + req.body.isbn);
            res.status(200).json(product);
        }

);
});
};

---

这意味着您需要使用产品作为产品

最好使用mongoose

findOneAndUpdate

方法进行更新。这样看起来既简洁又干净

exports.update = function(req, res){

  Product
    .findOneAndUpdate({ isbn: req.params.isbn }, req.body)
    .exec(function(err, product){
      if(err) return res.status(500).json({err: err.message}):
      res.json({product, message: 'Successfully updated'})
    });
};

---

最好使用mongoose

findOneAndUpdate

方法进行如下更新。这样看起来既简洁又干净

exports.update = function(req, res){

  Product
    .findOneAndUpdate({ isbn: req.params.isbn }, req.body)
    .exec(function(err, product){
      if(err) return res.status(500).json({err: err.message}):
      res.json({product, message: 'Successfully updated'})
    });
};

---

谢谢Rajesh Dan，我使用了Model.findOneAndUpdate（）和所有预期的工作！当然，很乐意帮忙@阿方索·桑切斯！：）谢谢Rajesh Dan，我使用了Model.findOneAndUpdate（）和所有预期的工作！当然，很乐意帮忙@阿方索·桑切斯！：）