node后台使用sequelize操作及总结资料

一、基本的sequelize常见操作--增删改查

1、引入sequelize模块

    var sequelize = require('sequelize');  

2、连接数据库

var  sequelize =  new  Sequelize(  
    'sample' ,  // 数据库名   
     'root' ,    // 用户名   
    'psw' ,    // 用户密码  
       { 

           'dialect' :  'mysql' ,   // 数据库使用mysql  

            'host' :  'localhost' ,  // 数据库服务器ip   

            'port' : 3306,         // 数据库服务器端口   

             'define' : {  

                    // 字段以下划线（_）来分割（默认是驼峰命名风格）   

                     'underscored' :  true  ,

                        ' charset ' : 'utf8',

                        ' collate': 'utf8_general_ci',

                        ' freezeTableName': true,

                        ' timestamps': true, //为模型添加 createdAt 和 updatedAt 两个时间戳字段
               },
              ' pool': {//连接池
                              'maxConnections': 20,
                             ' minConnections': 0,
                             ' maxIdleTime': 10000 // 连接最大空置时间（毫秒），超时后将释放连接
                },
          } 

 );  

3、定义表

1. var User = sequelize.define(  
2.   
3.     'user',  
4.   
5.     {  
6.   
7.         userId: {  
8.             field: 'user_id',  
9.             primaryKey: true,  
10.             type: Sequelize.BIGINT,  
11.             allowNull: false  
12.         },  
13.         userName: {  
14.             field: 'user_name',  
15.             type: Sequelize.STRING,  
16.             allowNull: false  
17.         },  
18.         userIcon: {  
19.             field: 'user_icon',  
20.             type: Sequelize.STRING,  
21.             allowNull: true  
22.         },  
23.         title: {  
24.             field: 'title',  
25.             type: Sequelize.STRING,  
26.             allowNull: true  
27.         },  
28.         gender: {  
29.             field: 'gender',  
30.             type: Sequelize.ENUM('MALE','FEMALE'),  
31.             allowNull: true  
32.         },  
33.         birth: {  
34.             field: 'birth',  
35.             type: Sequelize.STRING,  
36.             allowNull: true  
37.         },  
38.         mail: {  
39.             field: 'mail',  
40.             type: Sequelize.STRING,  
41.             allowNull: true  
42.         },  
43.         tel: {  
44.             field: 'tel',  
45.             type: Sequelize.STRING,  
46.             allowNull: true  
47.         },  
48.         mobile: {  
49.             field: 'mobile',  
50.             type: Sequelize.STRING,  
51.             allowNull: true  
52.         },  
53.         updateTime: {  
54.             field: 'update_time',  
55.             type: Sequelize.STRING,  
56.             allowNull: true  
57.         }  
58.     },  
59.     {  
60.         tableName: 'user',  
61.         timestamps: false,  
62.         freezeTableName: true  
63.     }  
64.   
65.   
66. );  

4、往表里添加数据

1. User.create({  
2.     userId: 23,  
3.     userName: '老杨',  
4.     updateTime: '2016-01-22 18:37:22'  
5. });  

5、修改表内数据

1. var pram={'userName':'晓博'};  
2.   
3. user.update(  
4.   
5.     pram,{  
6.           
7.             'where':{'userId':{eq:23}}  
8. }  
9. );//将userId等于23的userName改为'晓博' 

6、删除表内数据

user.destroy({'where':{'id':{eq:23}}});//将表内userId等于23的元组删除 

二、sequelize常见知识总结

定义model

import sequelize from 'sequelize'
var Foo = sequelize.define('foo', {
 // 默认值 和 是否为空
 flag: { type: Sequelize.BOOLEAN, allowNull: false, defaultValue: true},

 // 默认时间为创建时间

 myDate: { type: Sequelize.DATE, defaultValue: Sequelize.NOW },

 // 设置allowNull为false将会在数据表中添加 NOT NULL列,如果查询时该列为null,数据库会抛出错误
 // 如果你想在查询前检查该值是否为null，看一下下面的验证（validations）部分
 title: { type: Sequelize.STRING, allowNull: false},

 // unique 可以是boolean, 或 string.如果多个列是相同string
 // 就会变成 composite unique key.
 uniqueOne: { type: Sequelize.STRING,  unique: 'compositeIndex'},
 uniqueTwo: { type: Sequelize.INTEGER, unique: 'compositeIndex'}

 // unique会创建索引
 someUnique: {type: Sequelize.STRING, unique: true}
 // 也可以这么创建索引
 {someUnique: {type: Sequelize.STRING}},
 {indexes: [{unique: true, fields: ['someUnique']}]}

 // 主键
 identifier: { type: Sequelize.STRING, primaryKey: true},
 // 自动增量
 incrementMe: { type: Sequelize.INTEGER, autoIncrement: true },
 // 在MySQL and PG可以有comments
 hasComment: { type: Sequelize.INTEGER, comment: "I'm a comment!" },

 // 可以通过"field"属性设置特定的值
 fieldWithUnderscores: { type: Sequelize.STRING, field: "field_with_underscores" },

 // 创建外键
 bar_id: {
   type: Sequelize.INTEGER,
   references: {
     // This is a reference to another model
     model: Bar,
     // This is the column name of the referenced model
     key: 'id',
     // This declares when to check the foreign key constraint. PostgreSQL only.
     deferrable: Sequelize.Deferrable.INITIALLY_IMMEDIATE
   }
 }

})

数据类型

Sequelize.STRING                      // VARCHAR(255)
Sequelize.STRING(1234)                // VARCHAR(1234)
Sequelize.STRING.BINARY               // VARCHAR BINARY
Sequelize.TEXT                        // TEXT
Sequelize.TEXT('tiny')                // TINYTEXT
Sequelize.INTEGER                     // INTEGER
Sequelize.BIGINT                      // BIGINT
Sequelize.BIGINT(11)                  // BIGINT(11)
Sequelize.FLOAT                       // FLOAT
Sequelize.FLOAT(11)                   // FLOAT(11)
Sequelize.FLOAT(11, 12)               // FLOAT(11,12)
Sequelize.REAL                        // REAL        PostgreSQL only.
Sequelize.REAL(11)                    // REAL(11)    PostgreSQL only.
Sequelize.REAL(11, 12)                // REAL(11,12) PostgreSQL only.
Sequelize.DOUBLE                      // DOUBLE
Sequelize.DOUBLE(11)                  // DOUBLE(11)
Sequelize.DOUBLE(11, 12)              // DOUBLE(11,12)
Sequelize.DECIMAL                     // DECIMAL
Sequelize.DECIMAL(10, 2)              // DECIMAL(10,2)
Sequelize.DATE                        // DATETIME for mysql / sqlite, TIMESTAMP WITH TIME ZONE for postgres
Sequelize.DATE(6)                     // DATETIME(6) for mysql 5.6.4+. Fractional seconds support with up to 6 digits of precision
Sequelize.DATEONLY                    // DATE without time.
Sequelize.BOOLEAN                     // TINYINT(1)
Sequelize.ENUM('value 1', 'value 2')  // An ENUM with allowed values 'value 1' and 'value 2'
Sequelize.ARRAY(Sequelize.TEXT)       // Defines an array. PostgreSQL only.
Sequelize.JSON                        // JSON column. PostgreSQL only.
Sequelize.JSONB                       // JSONB column. PostgreSQL only.
Sequelize.BLOB                        // BLOB (bytea for PostgreSQL)
Sequelize.BLOB('tiny')                // TINYBLOB (bytea for PostgreSQL. Other options are medium and long)
Sequelize.UUID                        // UUID datatype for PostgreSQL and SQLite, CHAR(36) BINARY for MySQL (use defaultValue: Sequelize.UUIDV1 or Sequelize.UUIDV4 to make sequelize generate the ids automatically)
Sequelize.RANGE(Sequelize.INTEGER)    // Defines int4range range. PostgreSQL only.
Sequelize.RANGE(Sequelize.BIGINT)     // Defined int8range range. PostgreSQL only.
Sequelize.RANGE(Sequelize.DATE)       // Defines tstzrange range. PostgreSQL only.
Sequelize.RANGE(Sequelize.DATEONLY)   // Defines daterange range. PostgreSQL only.
Sequelize.RANGE(Sequelize.DECIMAL)    // Defines numrange range. PostgreSQL only.
Sequelize.ARRAY(Sequelize.RANGE(Sequelize.DATE)) // Defines array of tstzrange ranges. PostgreSQL only.
Sequelize.GEOMETRY                    // Spatial column.  PostgreSQL (with PostGIS) or MySQL only.
Sequelize.GEOMETRY('POINT')           // Spatial column with geomerty type.  PostgreSQL (with PostGIS) or MySQL only.
Sequelize.GEOMETRY('POINT', 4326)     // Spatial column with geomerty type and SRID.  PostgreSQL

范围类型

// 默认左开右闭'["2016-01-01 00:00:00+00:00", "2016-02-01 00:00:00+00:00")'
// inclusive lower bound, exclusive upper bound
Timeline.create({ range: [new Date(Date.UTC(2016, 0, 1)), new Date(Date.UTC(2016, 1, 1))] });

// control inclusion
const range = [new Date(Date.UTC(2016, 0, 1)), new Date(Date.UTC(2016, 1, 1))];
range.inclusive = false; // '()'
range.inclusive = [false, true]; // '(]'
range.inclusive = true; // '[]'
range.inclusive = [true, false]; // '[)'

// or as a single expression
const range = [
  { value: new Date(Date.UTC(2016, 0, 1)), inclusive: false },
  { value: new Date(Date.UTC(2016, 1, 1)), inclusive: true },
];
// '("2016-01-01 00:00:00+00:00", "2016-02-01 00:00:00+00:00"]'

// composite form
const range = [
  { value: new Date(Date.UTC(2016, 0, 1)), inclusive: false },
  new Date(Date.UTC(2016, 1, 1)),
];
// '("2016-01-01 00:00:00+00:00", "2016-02-01 00:00:00+00:00")'

Timeline.create({ range });

更多资料：https://itbilu.com/nodejs/npm/VkYIaRPz-.html#induction-promise  中文文档资料
https://www.liaoxuefeng.com/wiki/001434446689867b27157e896e74d51a89c25cc8b43bdb3000/001472286125147031e735933574ae099842afd31be80d1000