Question

我正在尝试使用Sequelize和mysql db创建模型。我正在尝试发布到'/ students / register'，它一直给我一个错误，指出findOne不是函数。我试过需要我的sql，但它无法正常工作..我还尝试了类似findAll的其他功能，但仍然无法正常工作。这似乎是问题所在

const Sequelize = require('sequelize');
module.exports = function (sequelize, Sequelize) {
    const Stundet = sequelize.define(
        'student', {
            id: {
                type: Sequelize.INTEGER,
                primaryKey: true,
                autoIncrement: true
            },
            name: {
                type: Sequelize.STRING
            },
            email: {
                type: Sequelize.STRING
            },
            password: {
                type: Sequelize.STRING
            },
            created: {
                type: Sequelize.DATE,
                defaultValue: Sequelize.NOW
            }
        }, {
            timestamps: false
        });
    module.exports = Stundet;

}

路线

const Student_Info = require("../models/students")

student.post('/register', (req, res) => {
    const dataToday = new Date()
    const studentData = {
        name: req.body.name,
        email: req.body.email,
        password: req.body.password,
        created: dataToday
    }
    Student_Info.findOne({
            where: {
                email: req.body.email
            }
        })
        .then(student => {
            if (!student) {
                bcrypt.hash(req.body.password, 10, (err, hash) => {
                    studentData.password = hash
                    Student_Info.create(studentData)
                        .then(student => {
                            res.json({
                                status: student.email + 'registered'
                            })
                        })
                        .catch(err => {
                            res.send('error' + err)
                        })
                })

            } else {
                res.json({
                    error: 'Student already registered'
                })
            }
        })
        .catch(err => {
            res.send('error' + err)
        })
})
module.exports = student;

Answer 1

使用module.exports时，应返回Stundet。您已经导出了整个功能。而且我认为您应该传递DataTypes而不是Sequelize。

类似这样的东西：

module.exports = function (sequelize, DataTypes) {
    const Stundet = sequelize.define(
        //...
    return Stundet;

}

所以在您的路线中才能使用模型：

const Sequelize = require('sequelize');
const DataTypes = sequelize.DataTypes;

let sequelize = new Sequelize(...);

const Student = require('../models/students')(sequelize, DataTypes);

Answer 2

我怀疑您的Student_Info为空。您的应用程序是否成功连接到数据库？它有助于记录...例如

sequelizeDB
  .authenticate()
  .then(() => {
        console.log('Yes! DB Connection);
        ...
    })
    .catch(err => {
        console.error('No! Unable to connect to DB', err);
    });

...和恕我直言，将数据库实例命名为“ sequelize”以外的其他代码时，代码的可读性更好。

findOne不是函数

2 个答案: