How to implement addition, deletion, modification and query in phpmongodb
How to implement addition, deletion, modification and query in php mongodb: 1. Data insertion, the code is [$res = $collection->insert($doc)]; 2. Data query, the code is [$One= $collection ->findOne(['First Name)]. The operating environment of this tutorial: Windows 7 system, PHP version 5.6, DELL G3 computer. How php mongodb implements addition, deletion, modification and query: MongoDB’s PHP driver provides some core classes to operate MongoDB. In general, the MongoDB command line It can implement all the functions in , and the parameter formats are basically similar. The operations of MongoDB between versions before PHP7 and after PHP7 are different. This article mainly uses the previous version of PHP7 as an example to explain the various operations of PHP on MongoDB. Finally, it briefly explains the operations of MongoDB by versions after PHP7. 1. Data insertion //insert() //Parameter 1: an array or object //Parameter 2: Extended options // fsync: The default is false. If it is true, mongo will force the data to be written to the hard disk before confirming that the data is inserted successfully. // j: The default is false. If it is true, mongo will force the data to be written to the log before confirming that the…
Understand the Golang file operation addition, deletion, modification and search functions in one article (Basics)
Foreword Currently, Golang can be considered one of the trends in the development of server development languages, especially in the development of streaming media servers, where it has already occupied a place. Many audio and video technology service providers also use the Golang language to develop their own backend services. It seems that the industry has reached a certain consensus. Today we won’t talk about the particularly profound mechanisms and contents, but let’s talk about Golang’s basic operations on files. Text Before we begin, let me tell you a very interesting little plot. When I first came into contact with the language Golang, I always felt that it was more similar to Google Words, so I once suspected that there was any connection between the two. Later, after a search, I discovered that the two are indeed related, hazy… because the Golang language was launched by Google. This promotion model reminds me of “Wangzi Milk” and “Wangzi Milk”. Okay, let’s get back to the topic. When it comes to file operations, they should be the basic operations of any language. So, how does Golang operate files? When using Golang to operate files, we can understand the basic operations on the…
Examples of creation, addition, deletion, modification and query methods of ORM tables in Django
Foreword Django, as a heavyweight Python web framework, must deal with the database when doing projects. Programmers are okay with the simple syntax of the database, but too many database statements are not the focus of programmers. Therefore, it is very fast to use ORM to operate the database. Today I will introduce how to use ORM to operate the database. 1. Create a Django project Can be created directly and quickly using pycharme professional version. If you are not in the professional version, you can also use commands to create it. The command line creation methods are listed below: django-admin startproject orm_test At this time, a folder named orm_test will be created in the current directory. Next, enter the orm_test folder and execute the command: python manage.py runserver The project is started. By accessing 127.0.0.1:8000 with the default browser, you can see the prompt that the project is running successfully. Next we use the command to create an application in the project: django-admin startapp cmdb The basic preparations are now complete. 2. Modify the configuration file Add our application, cmdb, to INSTALLED_APPS in setting.py: INSTALLED_APPS = [ ‘django.contrib.admin’, ‘django.contrib.auth’, ‘django.contrib.contenttypes’, ‘django.contrib.sessions’, ‘django.contrib.messages’, ‘django.contrib.staticfiles’, ‘cmdb’, #The application we created ]…
nodejs connects to mongodb database to implement addition, deletion, modification and query
Preparation 1. Install mongodb through npm command 2. Install the mongodb database. I will not introduce it in detail here. The installation URL is: https://www.jb51.net/article/82522.htm CRUD operations Before this, you should have some understanding of the MongoDB database and some of its add, delete, check and modify commands. 1. Add var MOngoClient= require(“mongodb”).MongoClient; var DB_URL = “mongodb://localhost:27017/chm”; function insertData(db) { var devices = db.collection(‘vip’); var data = {“name”:”node”,”age”:22,”addr”:”nb”,”addTime”:new Date()}; devices.insert(data,function(error, result){ if(error) { console.log(‘Error:’+ error); }else{ console.log(result.result.n); } db.close(); }); } MongoClient.connect(DB_URL, function(error, db){ console.log(‘Connection successful!’); insertData(db); }); 2. Search var mOngodb= require(‘mongodb’) var MOngoClient= require(‘mongodb’).MongoClient; var DB_CONN_STR = ‘mongodb://localhost:27017/chm’; var selectData = function(db, callback) { //Connect to table var collection = db.collection(‘vip’); //Query data var whereStr = {“name”:’node’}; collection.find(whereStr,function(error, cursor){ cursor.each(function(error,doc){ if(doc){ //console.log(doc); if (doc.addTime) { console.log(“addTime: “+doc.addTime); } } }); }); } MongoClient.connect(DB_CONN_STR, function(err, db) { console.log(“Connection successful!”); selectData(db, function(result) { console.log(result); db.close(); }); }); 3.Update var MOngoClient= require(“mongodb”).MongoClient; var DB_URL = “mongodb://localhost:27017/chm”; MongoClient.connect(DB_URL, function(error, db){ console.log(“Connection successful!”); updateData(db); }); function updateData(db) { var devices = db.collection(‘vip’); var whereData = {“name”:”node”} var updateDat = {$set: {“age”:26}}; //If $set is not used, replace the entire data devices.update(whereData, updateDat, function(error, result){ if (error) { console.log(‘Error:’+ error); }else{ console.log(result); } db.close();…
Sample code for springboot integrated mongodb addition, deletion, modification and query
Add dependencies org.springframework.boot spring-boot-starter-data-mongodb properties configuration spring.data.mongodb.host=127.0.0.1 spring.data.mongodb.port=27017 spring.data.mongodb.database=enterprise_dc_db spring.data.mongodb.username=enterprise_dc_dba spring.data.mongodb.password=123456 server.port=8081 Create entity class @Document is the mongodb collection name package com.example.springbootmongodb.domian; import org.springframework.data.mongodb.core.mapping.Document; @Document(collection = “mydb”) public class Users { private String userId; private String name; private Integer age; public String getUserId() { return userId; } public void setUserId(String userId) { this.userId = userId; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } } controller package com.example.springbootmongodb.controller; public class ResultObject { private int code; private String desc; private Object data; public ResultObject() { } public ResultObject(int code) { this.code = code; } public ResultObject(int code, Object data) { this.code = code; this.data = data; } public Object getData() { return data; } public void setData(Object data) { this.data = data; } public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getDesc() { return desc; } public void setDesc(String desc) { this.desc = desc; } } package com.example.springbootmongodb.controller; import com.example.springbootmongodb.domian.Users; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.mongodb.core.MongoTemplate; import org.springframework.data.mongodb.core.query.Criteria; import org.springframework.data.mongodb.core.query.Query; import org.springframework.data.mongodb.core.query.Update; import org.springframework.web.bind.annotation.*; import java.util.List; @RequestMapping(“/mongo”) @RestController…
Examples of basic operations such as Android programming to connect to MongoDB and addition, deletion, modification, and query
The examples in this article describe basic operations such as Android programming to connect to MongoDB and add, delete, modify, and query. Share it with everyone for your reference, the details are as follows: Introduction to MongoDB Mongodb, a distributed document storage database, written in C++ language, aims to provide scalable, high-performance data storage solutions for WEB applications. MongoDB is a high-performance, open source, schema-less document database, which is currently a popular NoSQL database. It can be used to replace traditional relational databases or key/value storage in many scenarios. Mongo is developed using C++. Mongo installation reference 1) Download the installation package file and extract it to a certain folder. Official download address: http://www.mongodb.org/downloads 2) Configure environment variables: add the installation path after path. 3) Start the Mongo database: Enter “cmd” -> type “mongod –dbpath D:\amp\MongoDBDATA” D:\amp\MongoDBDATA represents the database file storage path 4) Start the Mongo client: mongo 127.0.0.1:27017/admin Android connects to MongoDB Step 1: Download and import the jar package into the project Step 2: Install MongoDB on PC (see MongoDB installation) Step 3: Write code to connect to MongoDB to implement simple operations (add, delete, modify and query) Code reference (Android side, also applicable to java and…
Examples of basic operations such as Android programming to connect to MongoDB and addition, deletion, modification, and query
The examples in this article describe basic operations such as Android programming to connect to MongoDB and add, delete, modify, and query. Share it with everyone for your reference, the details are as follows: Introduction to MongoDB Mongodb, a distributed document storage database, written in C++ language, aims to provide scalable, high-performance data storage solutions for WEB applications. MongoDB is a high-performance, open source, schema-less document database, which is currently a popular NoSQL database. It can be used to replace traditional relational databases or key/value storage in many scenarios. Mongo is developed using C++. Mongo installation reference 1) Download the installation package file and extract it to a certain folder. Official download address: http://www.mongodb.org/downloads 2) Configure environment variables: add the installation path after path. 3) Start the Mongo database: Enter “cmd” -> type “mongod –dbpath D:\amp\MongoDBDATA” D:\amp\MongoDBDATA represents the database file storage path 4) Start the Mongo client: mongo 127.0.0.1:27017/admin Android connects to MongoDB Step 1: Download and import the jar package into the project Step 2: Install MongoDB on PC (see MongoDB installation) Step 3: Write code to connect to MongoDB to implement simple operations (add, delete, modify and query) Code reference (Android side, also applicable to java and…
Example of webpack4+express+mongodb+vue implementing addition, deletion, modification and query
Before explaining, let’s take a look at the effect as follows: 1) The effect of the entire page is as follows: 2) The effect of adding new data is as follows: 3) The new addition is successful as follows: 4) The effect of editing data is as follows: 5) The result of successful editing is as follows: 6) The effect of deleting data is as follows: 7) The effect of successful deletion is as follows: 8) The query results are as follows: With the above effect, we will still do the same as before. Let’s first look at the structure of our entire project as follows: ### The directory structure is as follows: demo1 # project name | |— dist # Directory file generated after packaging | |— node_modules # All dependent packages | |—-database # Database related file directory | | |—db.js # Database connection operation of mongoose class library | | |—user.js # Schema Create model | | |—addAndDelete.js # Add, delete, modify and check operations | |— app | | |—index | | | |– views # Store all vue page files | | | | |– list.vue # List data | | | | |– index.vue…
