NODEJS sequelize中联合唯一索引的实现

查了半天API文档，仔细看才发现这么一条

[attributes.column.unique=false]

String | Boolean

If true, the column will get a unique constraint. If a string is provided, the column will be part of a composite unique index. If multiple columns have the same string, they will be part of the same unique index

意思是unique这个属性可以为字符串也可以为bool型

假如为bool型的true，则表示单个这个列建唯一索引

假如为字符串，别的列中使用相同字符串的跟这个组成联合唯一索引，所以就实现了

"use strict";

module.exports = function (sequelize, DataTypes) {
    var Store = sequelize.define("Store", {
        storeId:{type:DataTypes.INTEGER, primaryKey: true,  autoIncrement: true},
        name: {type:DataTypes.STRING, unique:"uk_t_store"},
        address: DataTypes.STRING,
        status: {type: DataTypes.INTEGER, defaultValue: 1},
        areaId: {type:DataTypes.UUID,allowNull: false, unique:"uk_t_store"}
    }, {
        tableName: 't_store'
    });
    return Store;
};

本例中，areaId同时又是外键，关联一张area表，可以这么写

db['Store'].belongsTo(db['Area'], {foreignKey: "areaId", constraints: false});

同时附上另一张表的表结构

"use strict";

module.exports = function (sequelize, DataTypes) {
    var Area = sequelize.define("Area", {
        //区域ID
        areaId: {type: DataTypes.UUID, primaryKey: true, allowNull: false, defaultValue: DataTypes.UUIDV4},
        //区域名
        name: {type:DataTypes.STRING, unique:"uk_t_area"},
        //区域状态  1-启用 0-禁用
        status: {type: DataTypes.INTEGER, defaultValue: 1}

    }, {
        tableName: 't_area'
    });
    return Area;
};