在購物車管理系統中, 用戶具有多個訂單並且訂單屬於一個用戶,在這種情況下,用戶ID('用戶'表'的PK)在'訂單'表中爲FK。 我試過這個,但是這給了關聯錯誤,訂單沒有關聯到用戶。續訂關聯 - 訂單未與用戶關聯
db.user.findAll({
include: [
{
model: db.order
}
]
})
.then(users => {
res.json(users)
});
下面是型號: -
訂量: -
'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;
};
用戶: -
'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;
};
以下是錯誤: -
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)
仍然沒有工作 –
檢查我的編輯。你在定義結構中有錯誤 – yBrodsky
謝謝你,你是一個救命的人:) –