本文介绍了Sequelize.js-“不与”相关联的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
从数据库获取完整数据时遇到一些问题。
这是我的模型:
I have some issue with getting full data from db.That are my models:
用户
module.exports = function(sequelize, DataTypes) {
return sequelize.define('user', {
id: {
type: DataTypes.INTEGER(11),
allowNull: false,
primaryKey: true,
autoIncrement: true,
field: 'ID'
},
password: {
type: DataTypes.STRING(255),
allowNull: false,
field: 'password'
},
email: {
type: DataTypes.STRING(255),
allowNull: false,
unique: true,
field: 'email'
},
roleId: {
type: DataTypes.INTEGER(11),
allowNull: false,
references: {
model: 'role',
key: 'ID'
},
field: 'role_id'
}
}, {
timestamps: false,
tableName: 'user'
});
};
角色
module.exports = function(sequelize, DataTypes) {
return sequelize.define('role', {
id: {
type: DataTypes.INTEGER(11),
allowNull: false,
primaryKey: true,
autoIncrement: true,
field: 'ID'
},
name: {
type: DataTypes.STRING(255),
allowNull: false,
unique: true,
field: 'name'
},
description: {
type: DataTypes.STRING(255),
allowNull: false,
field: 'description'
},
permission: {
type: DataTypes.INTEGER(11),
allowNull: false,
field: 'permission'
}
}, {
timestamps: false,
tableName: 'role',
});};
我想获取一个特定用户的对象,包括所有角色内容。
像
I want to get object of one specific user including all role content.Somethink like
{
id: 4,
password: 'xxx',
email: '[email protected]',
role: {
id: 2,
name: 'admin'
description: 'ipsum ssaffa',
permission: 30
}
}
所以我正在使用:
User.findOne( { where: { id: req.userId }, include: [ Role ] } ).then( user =>{...});
但我得到的结果是err.message:角色未与用户关联
but I get in the result err.message: "role is not associated to user"
简单的问题-怎么了? :)
And the simple question - what's wrong ? :)
*处理我使用的模型sequelize-cli
*to handle models I'm using sequelize-cli
推荐答案
出现此错误是因为您没有在模型之间添加关联
You get this error because you didn't add associate between the models
基于json我看到每个用户只有一个角色,所以您可以在角色模型中使用EmiratesTo或在用户模型中使用hasOne
应该是这样的:
User.js
module.exports = function(sequelize, DataTypes) {
var user = sequelize.define('user', {
id: {
type: DataTypes.INTEGER(11),
allowNull: false,
primaryKey: true,
autoIncrement: true,
field: 'ID'
},
password: {
type: DataTypes.STRING(255),
allowNull: false,
field: 'password'
},
email: {
type: DataTypes.STRING(255),
allowNull: false,
unique: true,
field: 'email'
},
roleId: {
type: DataTypes.INTEGER(11),
allowNull: false,
references: {
model: 'role',
key: 'ID'
},
field: 'role_id'
}
}, {
timestamps: false,
tableName: 'user'
});
user.associate = function(models) {
user.hasOne(models.role, {foreignKey: 'id',sourceKey: 'roleId'});
}
return user;
};
Role.js
module.exports = function(sequelize, DataTypes) {
var role = sequelize.define('role', {
id: {
type: DataTypes.INTEGER(11),
allowNull: false,
primaryKey: true,
autoIncrement: true,
field: 'ID'
},
name: {
type: DataTypes.STRING(255),
allowNull: false,
unique: true,
field: 'name'
},
description: {
type: DataTypes.STRING(255),
allowNull: false,
field: 'description'
},
permission: {
type: DataTypes.INTEGER(11),
allowNull: false,
field: 'permission'
}
}, {
timestamps: false,
tableName: 'role',
});
role.associate = function(models) {
user.belongsTo(models.role, {foreignKey: 'id'});
}
return role;
};
这篇关于Sequelize.js-“不与”相关联的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!