我正在尝试使用 PostgreSQL 在 Sequelize 中执行 Eager Loading,我需要在其中找到具有给定特定 Mail id 或的 Users基本上,我正在对 Mail 模型执行查找操作,同时使用 include 来包含 User 模型
用户模型:
module.exports = function (sequelize, Sequelize) {
var User = sequelize.define('User', {
userId: {
type: Sequelize.INTEGER,
primaryKey: true,
autoIncrement: true
},
firstname: {
type: Sequelize.STRING,
require: true
},
lastname: {
type: Sequelize.STRING,
require: true
},
age: {
type: Sequelize.INTEGER,
require: true
},
phone: {
type: Sequelize.STRING,
require: true
},
location: {
type: Sequelize.STRING,
require: true
},
createdAt: {
type: Sequelize.DATE,
defaultValue: Sequelize.NOW
},
updatedAt: {
type: Sequelize.DATE,
defaultValue: Sequelize.NOW
}
});
return User;
};
邮件模型:
module.exports = function (sequelize, Sequelize) {
var User = require('./User.js')(sequelize, Sequelize)
var Mail = sequelize.define('Mail', {
name: {
type: Sequelize.STRING,
require: true
}
});
Mail.belongsTo(User);
return Mail;
};
邮件 Controller :
var db = require('../services/db.js');
module.exports = {
create: function (req, res, next) {
var Mailm = db.MailModel;
var name = req.body;
try {
db.sequelize.sync().then(function () {
Mailm.create(name).then(function (found) {
return res.json({
success: true,
message: found.get({
plain: true
})
});
})
});
} catch (ex) {
res.json({
success: false,
exception: ex
});
return;
}
},
query: function (req, res, next) {
var Mailm = db.MailModel;
var Userm = db.UserModel;
var name = req.body;
var option = {};
option.where = name;
option.include = [{
model: Userm
}];
try {
Mailm.findAll(option).then(function (found) {
console.log(found);
return res.json({
success: true,
message: found
});
});
} catch (ex) {
res.json({
success: false,
exception: ex
});
return;
}
}
};
它以完全正确的方式返回用户表和邮件表的记录。
Output :
{
"success": true,
"message":[
{
"id": 2,
"name": "Mailb2",
"createdAt": "2015-07-30T07:32:51.807Z",
"updatedAt": "2015-07-30T07:32:51.807Z",
"UserUserId": 2,
"User":{
"userId": 2,
"firstname": "Prerna",
"lastname": "Jain",
"age": 20,
"phone": "9812123456",
"location": "Sirsa",
"createdAt": "2015-07-30T07:30:48.000Z",
"updatedAt": "2015-07-30T07:30:48.000Z"
}
}
]
}
但我想禁用 createdAt 和 updatedAt User 表的字段,这样它就不会给我用户输出中的这两个字段。
我已经尝试了很多关于如何做到这一点,但仍然是徒劳的。任何人都可以帮助我。
最佳答案
我敢打赌这会迟到,将属性/特性添加到您的模型中,称为时间戳,它接受一个 bool 值作为值。例如:
module.exports = function (sequelize, Sequelize) {
var User = require('./User.js')(sequelize, Sequelize)
var Mail = sequelize.define('Mail', {
name: {
type: Sequelize.STRING,
require: true
}
},
{
// This does the magic
timestamps: false,
});
Mail.belongsTo(User);
return Mail;
};
此外,将其添加到用户模型中:
var User = sequelize.define('User', {
userId: {
type: Sequelize.INTEGER,
primaryKey: true,
autoIncrement: true
},
firstname: {
type: Sequelize.STRING,
require: true
},
lastname: {
type: Sequelize.STRING,
require: true
},
age: {
type: Sequelize.INTEGER,
require: true
},
phone: {
type: Sequelize.STRING,
require: true
},
location: {
type: Sequelize.STRING,
require: true
},
createdAt: {
type: Sequelize.DATE,
defaultValue: Sequelize.NOW
},
updatedAt: {
type: Sequelize.DATE,
defaultValue: Sequelize.NOW
}
},
{
timestamps: false
});
return User;
};
关于postgresql - 预加载 : How to disable specific fields of included table,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31722834/