How to use Mongodb for data storage in Beego framework

With the continuous development of the Internet and mobile Internet, the demand for Web applications continues to grow. In order to better meet these needs, corresponding technologies and frameworks are constantly updated and developed. For web application developers, it is crucial to choose a framework that suits their needs. Beego is an open source web application framework completely based on the Go language. It supports features such as automated operations and hot loading, so it is very suitable for web application development.

In the Beego framework, commonly used database storage methods include MySQL, PostgreSQL and Mongodb. Among them, Mongodb is a database based on distributed file storage, which not only has the high scalability of NoSQL databases, but also takes into account the flexibility of SQL databases.

The following describes how to use Mongodb for data storage in the Beego framework.

First, we need to install the Mongodb database. Taking the Ubuntu operating system as an example, install Mongodb through the following command:

sudo apt-get update
sudo apt-get install -y mongodb

After the installation is completed, we can start the Mongodb service through the following command:

sudo service mongodb start

Next, we need to introduce it into the Go language Mongodb driver package mgo. Enter the following command in the command line terminal to install:

go get gopkg.in/mgo.v2

Then, we need to perform relevant configurations in the Beego framework. Add the following configuration in the conf/app.conf file:

# Mongodb配置
mongo_db = test_db
mongo_host = localhost
mongo_port = 27017

Among them, mongo_db represents the database name to be used, mongo_host represents the Mongodb server address, and mongo_port represents the Mongodb server port.

When using Mongodb, we need to define a connection object. In the Beego framework, global variables can be defined in the main.go file as follows:

package main

import (
    "github.com/astaxie/beego"
    "gopkg.in/mgo.v2"
)

var (
    //定义mongodb session
    session *mgo.Session
)

func main() {
    var err error
    //连接Mongodb
    session, err = mgo.Dial(beego.AppConfig.String("mongo_host"))
    if err != nil {
        beego.Error(err)
    }
    //默认读写安全模式
    session.SetMode(mgo.Monotonic,true)
    //在最后关闭session
    defer session.Close()

    //启动Beego服务器
    beego.Run()
}

In the above code, we connect to the Mongodb database through the mgo.Dial function and save the connection object through the session variable . The session.SetMode function can set the default read and write security mode. Here it is set to mgo.Monotonic mode, which has the function of master-slave switching for minor errors. Finally, we close the connection in the Defer statement.

Next, we need to define a data model that contains CRUD operations. Create a Name.go file in the models directory and define the structure and methods as follows:

package models

import (
    "github.com/astaxie/beego"
    "gopkg.in/mgo.v2"
    "gopkg.in/mgo.v2/bson"
)

type User struct {
    Id bson.ObjectId `json:"id" bson:"_id"`
    Name string `json:"name" bson:"name"`
    Age int `json:"age" bson:"age"`
}

//定义集合名称
const COLLECTION = "user"

//定义Mongodb操作方法
func GetSession() *mgo.Session {
    return session.Copy()
}

func (this *User) Add() (err error) {
    //获得session会话
    session := GetSession()
    defer session.Close()
    //获得数据库名称和集合名称
    database := session.DB(beego.AppConfig.String("mongo_db"))
    collection := database.C(COLLECTION)
    //插入数据
    err = collection.Insert(this)
    return
}

//其他方法省略...

In the above code, we first define a structure named User, which contains The fields that need to be used in the model are simply defined here. An id, name and age attributes are simply defined. Next, we define a constant named COLLECTION, which is used to specify the collection name in the database corresponding to the model.

Finally, we define some methods for CRUD operations on the structure. Taking the Add method as an example, we first obtain the Mongodb session object through the GetSession function, and obtain the database object through the session.DB function. Next, we obtain the specified collection object through the C function of the object, and insert data into the collection by calling the Insert function of the object. Other CRUD operations can be defined as needed.

Using Mongodb for data storage requires first designing the database table and then using it to gradually become familiar with its features and usage. In the Beego framework, it is very simple to use Mongodb for data storage, and only simple configuration and code writing are required to implement the data storage function.

The above is the detailed content of How to use Mongodb for data storage in Beego framework. For more information, please follow other related articles on the PHP Chinese website!