sequelize-typescript

注意：

• 注意关联的名称 例如hobbies在使用HasMany 会生成createHobby关联方法 建议根据关联来起名称 对多就是负数 对一就是单数
• 关联关系(@BelongsToMany,@HasMany... )不要加@Column
• 加了关联关系的类才能使用对应的关联关系操作 没关联的类不能因为被关联而使用关联操作

常见操作

• CURD
• c => Model.create();
• u => Model.update(); instance.save(); instance.update();

• r =>
  1535300288894.png
• d => Model.destory();instance.destory();

表、列配置信息

• 表常用配置:
  1535300562473.png

• 数据库常用配置:
  1535300980622.png

• 字段常用配置

  • 主键:(注意 @Column一定要在下面)
    1535301033927.png

• 外键:
  1535301085507.png

• 自定义验证:
  1535301987646.png

• 钩子:
  1535302147260.png
  • 当一条数据被创建或者更新时可以调用这些钩子函数
  • 钩子函数必须是静态函数

关联关系

1. one to many

@Table
export default class Person extends Model {

  @Column
  name: string;

  @Column
  birthday: Date;

  @HasMany(() => Hobby,"p_id")
  hobbies: Hobby[];
}

@Table
export default class Hobby extends Model {

    @Column
    name: string;

    @ForeignKey(()=>Person)
    @AllowNull
    @Column({field:"p_id"})
    pId: string;

    @BelongsTo(() => Person)
    person: Person;
}

 const pModel = await Person.create({ name: "vijay", birthday: new Date() });
// create
const hModel = await pModel.$create("Hobby", { name: "sport" });
// add
const h = Hobby.build({ name: "sport2" });
await h.save();
await pModel.$add("Hobby",h);

// 常用关联方法
// modelA.$set('Hobbies', [ /* instance */]).then( /* ... */);
// modelA.$add('Hobby'|'Hobbies', /* instance */).then( /* ... */);
// modelA.$get('Hobbies').then( /* ... */);
// modelA.$count('Hobbies').then( /* ... */);
// modelA.$has('Hobbies').then( /* ... */);
// modelA.$remove('Hobby'|'Hobbies', /* instance */ ).then( /* ... */);
// modelA.$create('Hobby', /* value */ ).then( /* ... */);

2. one to one

@Table
export default class Hobby extends Model {

    @Column
    name: string;

    @ForeignKey(()=>Person)
    @AllowNull
    @Column({field:"p_id"})
    pId: string;

    @BelongsTo(() => Person)
    person: Person;
}

@Table
export default class Person extends Model {

  @Column
  name: string;

  @Column
  birthday: Date;

  @HasOne(() => Hobby,"p_id")
  hobby: Hobby;
}

3. many to many

   @Table
   export default class Person extends Model {
       @PrimaryKey
       @AutoIncrement
       @Column
       id: number;
   
       @Column
       name: string;
   
       @Column
       birthday: Date;
   
       @BelongsToMany(() => Hobby,()=>HobbyPerson)
       hobbies: Hobby[];
   }
   
   @Table
   export default class HobbyPerson extends Model{
       @PrimaryKey
       @AutoIncrement
       @Column
       id:number;
   
       @ForeignKey(()=>Hobby)
       @AllowNull
       @Column({field:"h_id"})
       hId:number;
   
       @ForeignKey(()=>Person)
       @AllowNull
       @Column({field:"p_id"})
       pId:number;
   }
   
   @Table
   export default class Person extends Model {
       @PrimaryKey
       @AutoIncrement
       @Column
       id: number;
   
       @Column
       name: string;
   
       @Column
       birthday: Date;
   
       @BelongsToMany(() => Hobby,()=>HobbyPerson)
       hobbies: Hobby[];
   }
   

   原生sequelize迁移

• 将sequelize换成从sequelize-typescript 中导出的

  import { Sequelize } from 'sequelize-typescript';
  // import * as Sequelize from 'sequelize'
  

• 将后续用sequelize-typescript写的模型类加入到sequlize实例中

  import Car from '../models/Car';
  
  const db = new Sequelize({
      dialect: 'mysql',
      operatorsAliases: true, //是否识别字段别名中的下划线
      database: 'shaliang',
      username: 'root',
      password: 'root',
      define: {
          timestamps: true,//开启时间戳 create_at delete_at update_at
          paranoid: true,//开启假删除
          underscored: true,//下划线
          charset: 'utf8',
          freezeTableName: true//固定表名为单数  默认表名是xxxs
      },
      pool: {
          max: 10,
          min: 0,
          acquire: 30000,
          idle: 10000
      },
      timezone: '+08:00',//更改为北京时区
      // modelPaths: [__dirname + '/../models'] //模型文件地址
  });
  db.addModels([Car]);