egg.js sequelize database operation configuration Article directory egg.js sequelize database operation configuration 1. Database configuration 2. Migrate configuration 3.Data table design and migration 4. Model Creation 1. Database configuration Install and configure the egg-sequelize plug-in (it will assist us in loading the defined Model objects into app and ctx) and the mysql2 module: npm install […]
Tag: sequel
Use Class to encapsulate sequelize twice (nodejs, next, nuxt operation database)
1. Foreword Recently, I am working on the NextJS full stack, and I cannot avoid operating the database. sequelize is an ORM framework for NodeJS data manipulation, which can effectively avoid SQL injection vulnerabilities caused by native SQL statements. However, the native sequelize is more cumbersome to write, and the support for detailed ts is […]
sequelize database and migration configuration
1. Database configuration Install and configure the egg-sequelize plug-in (it will assist us in loading the defined Model objects into app and ctx) and the mysql2 module: npm install –save egg-sequelize mysql2 Introduce the egg-sequelize plug-in into config/plugin.js exports.sequelize = {<!– –> enable: true, package: “egg-sequelize”, }; In config/config.default.js config.sequelize = {<!– –> dialect: “mysql”, […]
NodeJS Express Sequelize
1. NodeJS 1. Global variables global: the host of global variables (similar to the window object in browser js), this is a special object called the global object (Global Object), it and all its properties can be accessed anywhere in the program __filename: The filename (full/absolute path) of the currently executing script __dirname: The directory […]
Sequelize: A Powerful ORM Framework in Node.js
Forge ahead, live up to your vision, always on the road Table of Contents foreword Advantages: Improve efficiency and complete database operations without SQL. So what is Sequelize? Main features: 1. Model definition and mapping: 2. Association and connection: 3. Transaction management: 4. Query construction: 5. Data verification: Detailed usage example: 1. Create a database […]
[Solved] NodeJs reports SequelizeDatabaseError Unknown column ‘created_at’ in ‘field list’ solution
Phenomenon { “ret”: 0, “msg”: “Failed to get”, “e”: { “name”: “SequelizeDatabaseError”, “parent”: { “code”: “ER_BAD_FIELD_ERROR”, “errno”: 1054, “sqlState”: “42S22”, “sqlMessage”: “Unknown column ‘created_at’ in ‘field list'”, “sql”: “SELECT `id`, `room_id` AS `roomId`, `stu_name` AS `stuName`, `stu_code` AS `stuCode`, `vision_left` AS `visionLeft`, `vision_right` AS ` visionRight`, `vision_avg` AS `visionAvg`, `correct_left` AS `correctLeft`, `correct_right` AS `correctRight`, […]
[Solved] The solution to the problem that Sequel Pro needs to be reinstalled after the Mac restarts (with possible problems and solutions)
Solution to the problem that Sequel Pro needs to be reinstalled after the Mac restarts (with possible problems and solutions) Article table of contents foreword 1. Install HomeBrew under Mac system 2. Install Sequel Pro using Homebrew Summarize Foreword After every restart, Sequel Pro has to be reinstalled, which is cumbersome and time-consuming. Check the […]