[英]one-to-many relationship with sequelize
我有 2 个表,users 和 users_signature,其中签名需要多个应用程序,我需要根据应用程序进行选择。
楷模:
用户
const { INTEGER } = require('sequelize');
const Sequelize = require('sequelize');
const database = require('../../config/db');
const User_has_signature = require('./user_has_signature');
const Usuario = database.define('usuario', {
usu_id: {
type: Sequelize.INTEGER,
autoIncrement: true,
allowNull: false,
primaryKey: true
},
usu_rg: {
type: Sequelize.STRING,
},
},
{
freezeTableName: true,
createdAt: false,
updatedAt: false,
});
User.hasMany(User_has_signature, {as: 'user_has_signature'});
module.exports = User;
User_has_signature
const { INTEGER } = require('sequelize');
const Sequelize = require('sequelize');
const database = require('../../config/db');
const User_has_signature = database.define('user_has_signature', {
usu_has_signature_id: {
type: Sequelize.INTEGER,
autoIncrement: true,
allowNull: false,
primaryKey: true
},
user_usu_id: {
type: Sequelize.STRING,
},
signature_aplicativo_signature_aplicativo_id: {
type: Sequelize.STRING,
},
signature_type_signature_type_id: {
type: Sequelize.STRING,
},
},
{
freezeTableName: true,
createdAt: false,
updatedAt: false,
});
User_has_signature.associate = (models) => {
User_has_signature.belongsTo(models.User,
{ foreignKey: 'user_usu_id', as: 'users' });
};
module.exports = User_has_signature;
控制器
用户控制器
const User = require("../../model/user/user")
const User_has_signature = require("../../model/user/user_has_signature")
async index(req, res){
const user = await User.findAll({
include: [{
model: User_has_signature,
foreignKey: 'user_usu_id',
through: {
where: {signature_ttype_signature_type_id: 3}
}
}]
})
res.status(200).json(user)
return
}
在终端中返回给我的错误是:(node:15168) UnhandledPromiseRejectionWarning: SequelizeEagerLoadingError: user_has_signature 使用别名关联到 usuario。 您必须使用“as”关键字在包含语句中指定别名
我认为您必须在编写查询时指定您提供的别名:
include: [{
model: User_has_signature,
foreignKey: 'user_usu_id',
as : 'users'
through: {
where: {signature_ttype_signature_type_id: 3}
}]
无论哪种方式,我都在 Typescript 中更多地使用 Sequelize,所以我不确定语法。
它处理一对多关系的方式并不是我见过的最清晰的(比如 Symfony 或 Spring)
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