sequelize-typescript使用的一些坑

在安装sequelize-typescript过程中遇到的一些坑

注意安装的方法：
当你使用的是npm install sequelize --save安装时默认安装的是sequelize最新版也就是V5以上的版本当你在安装npm install sequelize-typescript --save 时默认安装的是最新版，当你在将ts代码编译成js过程中会报一些关于sequelize-typescript包的一些错误，是由于当前sequelize的版本和sequelize-typescript的版本不兼容。解决方案如下:
1.卸载当前sequelize-typescript的版本（npm uninstall sequelize-typescript --save）
2.执行npm install sequelize-typescript@next --save命令
3.执行 npm install @types/validator @types/bluebird --save-dev
4.重新编译就不会报错

但是不要以为这样就解决问题了
当你在链接数据库的时候会发现莫名其妙的多了一些字段如creatAt等等，还会发现自己的数据表莫名的多了个s解决办法
在@Table中加入timestamps: false,freezeTableName: true

@Table({
    tableName: "project",
    timestamps: false,
    freezeTableName: true
})

因为当你在使用sequelize时会默认给你加一些字段，将你的表名变成第三人称所以需要手动的去修改
具体参数如下

var Bar = sequelize.define('bar', { /* bla */ }, {
  // don't add the timestamp attributes (updatedAt, createdAt)
  timestamps: false,

  // don't delete database entries but set the newly added attribute deletedAt
  // to the current date (when deletion was done). paranoid will only work if
  // timestamps are enabled
  paranoid: true,

  // don't use camelcase for automatically added attributes but underscore style
  // so updatedAt will be updated_at
  underscored: true,

  // disable the modification of table names; By default, sequelize will automatically
  // transform all passed model names (first parameter of define) into plural.
  // if you don't want that, set the following
  freezeTableName: true,

  // define the table's name
  tableName: 'my_very_custom_table_name',

  // Enable optimistic locking.  When enabled, sequelize will add a version count attriubte
  // to the model and throw an OptimisticLockingError error when stale instances are saved.
  // Set to true or a string with the attribute name you want to use to enable.
  version: true
})