javascript - 未处理的拒绝 SequelizeUniqueConstraintError : Validation error

Question

我收到这个错误:

Unhandled rejection SequelizeUniqueConstraintError: Validation error

我该如何解决这个问题？

这是我的模型/user.js

"use strict";

module.exports = function(sequelize, DataTypes) {
  var User = sequelize.define("User", {
    id:  { type: DataTypes.INTEGER, autoIncrement: true, primaryKey: true},
    name: DataTypes.STRING,
    environment_hash: DataTypes.STRING
  }, {
    tableName: 'users',
    underscored: false,
    timestamps: false
  }

  );

  return User;
};

这是我的 routes.js:

app.post('/signup', function(request, response){

        console.log(request.body.email);
        console.log(request.body.password);

        User
        .find({ where: { name: request.body.email } })
            .then(function(err, user) {
                if (!user) {
                        console.log('No user has been found.');

                        User.create({ name: request.body.email }).then(function(user) {
                            // you can now access the newly created task via the variable task
                            console.log('success');
                        });

                } 
            });



    });

Answer 1

调用 User.create() 返回一个 Promise.reject()，但是没有 .catch(err)处理它。如果不捕获错误并不知道输入值，就很难说出验证错误是什么——request.body.email 可能太长，等等。

捕获 Promise 拒绝以查看错误/验证详细信息

User.create({ name: request.body.email })
.then(function(user) {
    // you can now access the newly created user
    console.log('success', user.toJSON());
})
.catch(function(err) {
    // print the error details
    console.log(err, request.body.email);
});

更新，因为现在是 2019 年，您可以使用 async/await

try {
  const user = await User.create({ name: request.body.email });
  // you can now access the newly created user
  console.log('success', user.toJSON());
} catch (err) {
  // print the error details
  console.log(err, request.body.email);
}