Javascript sequelize关联-订单未与用户关联
在购物车管理系统中, 用户拥有多个订单和一个属于用户的订单,在这种情况下,用户ID(“用户”表的PK)在“订单”表中是FK。 我尝试过这个,但这会导致关联错误,即订单未关联到用户Javascript sequelize关联-订单未与用户关联,javascript,express,sequelize.js,Javascript,Express,Sequelize.js,在购物车管理系统中, 用户拥有多个订单和一个属于用户的订单,在这种情况下,用户ID(“用户”表的PK)在“订单”表中是FK。 我尝试过这个,但这会导致关联错误,即订单未关联到用户 db.user.findAll({ include: [ { model: db.order } ] }) .then(users => { res.json(users) }); 以下是模型:- 订单:- 'use st
db.user.findAll({
include: [
{
model: db.order
}
]
})
.then(users => {
res.json(users)
});
以下是模型:-
订单:-
'use strict';
var db = require('../models/index');
module.exports = function (sequelize, DataTypes) {
var order = sequelize.define('order', {
id: {
type: DataTypes.INTEGER,
allowNull: false,
primaryKey: true,
autoIncrement: true
},
userId: {
type: DataTypes.INTEGER,
allowNull: false
},
totalAmount: {
type: DataTypes.INTEGER,
allowNull: false
}
,
createdAt: {
type: DataTypes.DATE,
allowNull: true
},
updatedAt: {
type: DataTypes.DATE,
allowNull: true
}
}, {
classMethods: {
associate: function (models) {
order.belongsTo(models.user);
order.belongsToMany(models.products, { through: { model: models.orderProduct } });
// order.hasMany(models.orderProduct);
}
}
});
return order;
};
用户:-
'use strict';
var db = require('../models/index');
module.exports = function (sequelize, DataTypes) {
var user = sequelize.define('user', {
id: {
type: DataTypes.INTEGER(11),
allowNull: false,
primaryKey: true,
autoIncrement: true
},
name: {
type: DataTypes.STRING(255),
allowNull: false
},
email: {
type: DataTypes.STRING(255),
allowNull: false
},
password: {
type: DataTypes.STRING(255),
allowNull: false
},
address: {
type: DataTypes.STRING(255),
allowNull: true
},
contact: {
type: DataTypes.STRING(255),
allowNull: true
},
type: {
type: DataTypes.STRING(255),
allowNull: true
},
createdAt: {
type: DataTypes.DATE,
allowNull: true
},
updatedAt: {
type: DataTypes.DATE,
allowNull: true
},
}, {
activated: {
type: DataTypes.BOOLEAN,
allowNull: true
}
}, {
classMethods: {
associate: function (models) {
user.hasMany(models.order);
}
}
});
return user;
};
以下是错误:-
Unhandled rejection Error: order is not associated to user!
at Model.validateIncludedElement (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\sequelize\lib\model.js:558:11)
at F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\sequelize\lib\model.js:440:29
at Array.map (native)
at Model.validateIncludedElements (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\sequelize\lib\model.js:436:37)
at Model.<anonymous> (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\sequelize\lib\model.js:1372:32)
at Model.tryCatcher (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\bluebird\js\release\util.js:16:23)
at Promise._settlePromiseFromHandler (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\bluebird\js\release\promise.js:512:31)
at Promise._settlePromise (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\bluebird\js\release\promise.js:569:18)
at Promise._settlePromise0 (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\bluebird\js\release\promise.js:614:10)
at Promise._settlePromises (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\bluebird\js\release\promise.js:693:18)
at Async._drainQueue (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\bluebird\js\release\async.js:133:16)
at Async._drainQueues (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\bluebird\js\release\async.js:143:10)
at Immediate.Async.drainQueues (F:\UNI\BSCS -VII\IAD\WebProjects\Project\SERVER\node_modules\bluebird\js\release\async.js:17:14)
at runCallback (timers.js:666:20)
at tryOnImmediate (timers.js:639:5)
at processImmediate [as _immediateCallback] (timers.js:611:5)
未处理的拒绝错误:订单未与用户关联!
在Model.validateincludeelement(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\sequelize\lib\Model.js:558:11)
位于F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\sequelize\lib\model.js:440:29
at Array.map(本机)
在Model.validateincludeelements(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\sequelize\lib\Model.js:436:37)
在模型上。(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\sequelize\lib\model.js:1372:32)
在Model.tryCatcher(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\bluebird\js\release\util.js:16:23)
在Promise.\u settlePromiseFromHandler(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\bluebird\js\release\Promise.js:512:31)
在Promise.\u结算Promise(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\bluebird\js\release\Promise.js:569:18)
在Promise.\u settlePromise0(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\bluebird\js\release\Promise.js:614:10)
在Promise.\u结算项目(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\bluebird\js\release\Promise.js:693:18)
异步绘制队列(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\bluebird\js\release\Async.js:133:16)
异步绘制队列(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\bluebird\js\release\Async.js:143:10)
位于Immediate.Async.drainQueues(F:\UNI\BSCS-VII\IAD\WebProjects\Project\SERVER\node\u modules\bluebird\js\release\Async.js:17:14)
运行回调时(timers.js:666:20)
在tryOnImmediate(timers.js:639:5)
在processImmediate[as_immediateCallback](timers.js:611:5)
指定外键。你使用的那些钥匙不会自动推断出来
order.belongsTo(models.user, {foreignKey: 'userID'});
..
user.hasMany(models.order, {foreignKey: 'userID'});
编辑:我重新检查了你的帖子,你的用户定义错误。最后一个“激活”字段位于外部,关闭上一个对象。这就是为什么它没有阅读你的协会
updatedAt: {
type: DataTypes.DATE,
allowNull: true
},
}, {
activated: {
type: DataTypes.BOOLEAN,
allowNull: true
}
}, {
classMethods: {
associate: function (models) {
user.hasMany(models.order);
}
}
});
应该是:
updatedAt: {
type: DataTypes.DATE,
allowNull: true
},
activated: {
type: DataTypes.BOOLEAN,
allowNull: true
}
}, {
classMethods: {
associate: function (models) {
user.hasMany(models.order);
}
}
});
试试这个。
修改您的关联,如下所示:
order.belongsTo(models.user, {as : 'User'});
user.hasMany(models.order, {as : 'Orders'});
查询时:
db.user.findAll({
include: [{model: db.order, as: 'Orders'}]
})
.then(users => {
res.json(users)
});
检查我的编辑。您在定义结构中有一个错误问题出现在my user.js(activated属性)中,谢谢:)