【发布时间】：2018-09-07 19:44:37
【问题描述】：
使用 Sequelize 在我的数据库中创建或更新项目时，我发现验证器一次只返回一个验证错误。
这并不理想，因为我想在用户提交包含多个错误的表单时将所有错误返回给用户。
这是我的模型：
module.exports = (Sequelize, DataTypes) => {
const User = Sequelize.define(
'user',
{
email: {
type: DataTypes.STRING,
allowNull: false,
unique: {
args: true,
msg: 'That email is not available.'
},
validate: {
isEmail: {
args: true,
msg: 'Please enter a valid email.'
}
}
},
username: {
type: DataTypes.STRING,
allowNull: false,
notEmpty: true,
unique: {
args: true,
msg: 'That username is not available.'
},
validate: {
min: {
args: USER_USERNAME_MIN_LENGTH,
msg: 'Please choose a longer username.'
},
max: {
args: USER_USERNAME_MAX_LENGTH,
msg: 'Please choose a shorter username.'
},
is: {
args: /^[0-9a-zA-Z](\/?[a-zA-Z0-9-_])*\/?$/i,
msg: 'Please enter a valid username.'
}
}
}
},
{
underscored: true,
}
);
return User;
};
这是我的控制器（在这种情况下，我正在尝试更新用户，例如 User 1 并修改他们的 username 和 email 的值，这恰好是另一个用户的相同值用户，比如User 2)。
try {
const user = await User.findById(req.user.id);
if (user) {
const updatedUser = await user.update({
username: username || req.user.username,
email: email || req.user.email
});
res.status(200).end();
}
} catch (err) {
console.log(err);
return res.status(500).send(getMappedErrors(err));
}
因此，您可能希望验证器返回 email 和 username 字段的错误，因为它违反了 unique 标志。
但是，这就是我在 catch 块中得到的：
{ SequelizeUniqueConstraintError: That username is not available.
at Query.formatError (/site/node_modules/sequelize/lib/dialects/postgres/query.js:325:18)
at query.catch.err (/site/node_modules/sequelize/lib/dialects/postgres/query.js:86:18)
at tryCatcher (/site/node_modules/bluebird/js/release/util.js:16:23)
at Promise._settlePromiseFromHandler (/site/node_modules/bluebird/js/release/promise.js:512:31)
at Promise._settlePromise (/site/node_modules/bluebird/js/release/promise.js:569:18)
at Promise._settlePromise0 (/site/node_modules/bluebird/js/release/promise.js:614:10)
at Promise._settlePromises (/site/node_modules/bluebird/js/release/promise.js:689:18)
at Async._drainQueue (/site/node_modules/bluebird/js/release/async.js:133:16)
at Async._drainQueues (/site/node_modules/bluebird/js/release/async.js:143:10)
at Immediate.Async.drainQueues [as _onImmediate] (/site/node_modules/bluebird/js/release/async.js:17:14)
at runCallback (timers.js:763:18)
at tryOnImmediate (timers.js:734:5)
at processImmediate (timers.js:716:5)
at process.topLevelDomainCallback (domain.js:101:23)
name: 'SequelizeUniqueConstraintError',
errors:
[ ValidationErrorItem {
message: 'That username is not available.',
type: 'unique violation',
path: 'username',
value: 'bob',
origin: 'DB',
instance: [user],
validatorKey: 'not_unique',
validatorName: null,
validatorArgs: [] } ],
fields: { username: 'bob' },
parent:
{ error: duplicate key value violates unique constraint "users_username_key"
at Connection.parseE (/site/node_modules/pg/lib/connection.js:545:11)
at Connection.parseMessage (/site/node_modules/pg/lib/connection.js:370:19)
at Socket.<anonymous> (/site/node_modules/pg/lib/connection.js:113:22)
at Socket.emit (events.js:127:13)
at Socket.emit (domain.js:421:20)
at addChunk (_stream_readable.js:269:12)
at readableAddChunk (_stream_readable.js:256:11)
at Socket.Readable.push (_stream_readable.js:213:10)
at TCP.onread (net.js:598:20)
name: 'error',
length: 204,
severity: 'ERROR',
code: '23505',
detail: 'Key (username)=(bob) already exists.',
hint: undefined,
position: undefined,
internalPosition: undefined,
internalQuery: undefined,
where: undefined,
schema: 'public',
table: 'users',
column: undefined,
dataType: undefined,
constraint: 'users_username_key',
file: 'nbtinsert.c',
line: '434',
routine: '_bt_check_unique',
sql: 'UPDATE "users" SET "username"=\'bob\',"email"=\'me@aol.com\',"updated_at"=\'2018-03-28 19:26:27.341 +00:00\' WHERE "id" = 2' } ...
我截断了其余部分，但如您所见，它只返回用户名的错误。当我解决这个问题，然后再次提交我的表单时，我才会收到电子邮件地址的验证错误。
【问题讨论】：
-
我也遇到了同样的问题，你解决了吗？
-
我也很好奇这个问题是否得到了解决。 This answer 使用自定义 isUnique 验证函数，该函数为用户名和电子邮件地址调用 find/findOne 方法。这不能在不使用 findOne 方法的情况下完成吗？我想要所有的错误——不仅仅是一个错误。
标签： node.js orm sequelize.js