TypeError："x“不是构造函数

Question

TypeError: Produto is not a constructor
    at exports.create (C:\Users\mathe\Documents\TESTES\todoList\back-end\src\controllers\produtos.controller.js:18:4)
    at Layer.handle [as handle_request] (C:\Users\mathe\Documents\TESTES\todoList\back-end\node_modules\express\lib\router\layer.js:95:5)
    at next (C:\Users\mathe\Documents\TESTES\todoList\back-end\node_modules\express\lib\router\route.js:137:13)
    at Route.dispatch (C:\Users\mathe\Documents\TESTES\todoList\back-end\node_modules\express\lib\router\route.js:112:3)
    at Layer.handle [as handle_request] (C:\Users\mathe\Documents\TESTES\todoList\back-end\node_modules\express\lib\router\layer.js:95:5)
    at C:\Users\mathe\Documents\TESTES\todoList\back-end\node_modules\express\lib\router\index.js:281:22
    at Function.process_params (C:\Users\mathe\Documents\TESTES\todoList\back-end\node_modules\express\lib\router\index.js:335:12)
    at next (C:\Users\mathe\Documents\TESTES\todoList\back-end\node_modules\express\lib\router\index.js:275:10)
    at Function.handle (C:\Users\mathe\Documents\TESTES\todoList\back-end\node_modules\express\lib\router\index.js:174:3)
    at router (C:\Users\mathe\Documents\TESTES\todoList\back-end\node_modules\express\lib\router\index.js:47:12)

"produtos构造函数“：

exports.create = (req, res) => {
  const new_produto = new Produto(req.body);

    if(req.body.constructor === Object && Object.keys(req.body).length ===0) {
        res.status(400).send({error: true, message: "Please provide all required field"});
    } else {
        Produto.create(new_produto, (err, Produto) => {
            if(err) res.send(err);

            res.json({
                error: false,
                message: "Produto added sucefull",
                data: Produto
            });
        });
    }
}

Answer 1

您必须更改Produto的定义。

从这里开始

const Produto = () => { ... }
Produto.create = (newProd, result) => { ... }

到这个

function Produto() { ... }
Produto.prototype.create = function (newProd, result) { ... }

这将创建一个带有create方法的构造函数，而箭头函数不创建构造函数，并且不是创建方法的最佳方法，因为它不保留this上下文。