SequelizeDatabaseError: could not serialize access due to concurrent update

Question

在 Mocha 测试 beforeEach 钩子中，我正在尝试 destroy 所有 table 记录。

import { db } from '../src/db/models';

export const truncateTable = () => {
  const promises = Object.keys(db).map(key => {
    if (key !== 'Sequelize' && key !== 'sequelize') {
      console.log(key);
      return db[key].destroy({ where: {} });
    }
  });

  return Promise.all(promises);
};

然后在测试中，我是这样做的：

describe.only('application mutations', () => {

  beforeEach(() => truncateTable());

  ...

我遇到的错误：

SequelizeDatabaseError: could not serialize access due to concurrent update

Answer 1

TL/DR：在您的测试中，如果您想快速删除模型并重置您的数据库，请使用 sync。

describe.only('application mutations', () => {
  beforeEach(async () => {
    await db.sync({force: true})
  });
}

如果你想单独销毁你的模型，你必须在启动新模型之前适当地等待你的承诺完成。目前，您的承诺正在同时启动，因此出现 Sequelize 错误。

export const truncateTable = async () => {
  const promises = Object.keys(db).map(key => {
    if (key !== 'Sequelize' && key !== 'sequelize') {
      await db[key].destroy({ where: {} });
    }
  });
};

// in your test file
describe.only('application mutations', () => {
  beforeEach(async () => {
    await truncateTable();
  });
})

SequelizeDatabaseError: could not serialize access due to concurrent update

SequelizeDatabaseError: could not serialize access due to concurrent update

mocha.js

sequelize.js